Document:

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                                                                    EXHIBIT 10.1
________________________________________________________________________________

                     CONTRIBUTION AND ASSUMPTION AGREEMENT

                                 by and among

                             PPG AUTO GLASS, LLC,

                           APOGEE ENTERPRISES, INC.,

                            THE GLASS DEPOT, INC.,

                      THE GLASS DEPOT OF NEW YORK, INC.,

                             HARMON GLASS COMPANY,

                          AMERICAN MANAGEMENT GROUP,

                              DOVER GLASS COMPANY

                                      and

                             PPG INDUSTRIES, INC.

                                  dated as of

                                  Jun 13, 2000

________________________________________________________________________________
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                               TABLE OF CONTENTS
                               -----------------

<TABLE>
<S>                                                                                                           <C>
ARTICLE I  DEFINITIONS...................................................................................      2

ARTICLE II  CONTRIBUTION OF ASSETS; ASSUMPTION OF LIABILITIES............................................     15
 Section 2.1.  Agreement to Contribute and Accept........................................................     15
 Section 2.2.  Excluded Assets...........................................................................     18
 Section 2.3.  Assumption of Liabilities.................................................................     19
 Section 2.4.  Prorations................................................................................     20
 Section 2.5.  Taxes.....................................................................................     20
 Section 2.6.  Rents.....................................................................................     21

ARTICLE III  CONTRIBUTION CONSIDERATION; PAYMENT FOR CONTRIBUTION EXCESS.................................     21
 Section 3.1.  Contribution Consideration................................................................     21
 Section 3.2.  Company Payment based on Contribution Excess..............................................     21
 Section 3.3.  Contribution of Inventory.................................................................     25
 Section 3.4.  Purchase of PPG Owned Trucks..............................................................     26

ARTICLE IV  THE CLOSING..................................................................................     26
 Section 4.1.  The Closing...............................................................................     26
 Section 4.2.  Deliveries upon Execution of this Agreement; Effective Upon Closing ......................     26
 Section 4.3.  Closing Deliveries of both Contributing Parties...........................................     27
 Section 4.4.  Closing Deliveries of Apogee..............................................................     28
 Section 4.5.  Closing Deliveries of PPG.................................................................     28
 Section 4.6.  Closing Deliveries of the Company.........................................................     28

ARTICLE V  REPRESENTATIONS AND WARRANTIES OF APOGEE......................................................     29
 Section 5.1.  Corporate Existence and Power.............................................................     29
 Section 5.2.  Authority; Execution, Delivery; Valid and Binding Agreement...............................     29
 Section 5.3.  No Breach.................................................................................     30
 Section 5.4.  Governmental Authorization................................................................     30
 Section 5.5.  Inventory.................................................................................     30
 Section 5.6.  Properties; Leases........................................................................     30
 Section 5.7.  Contracts; Required Consents..............................................................     31
 Section 5.8.  Permits...................................................................................     32
 Section 5.9.  Compliance with Laws......................................................................     32
 Section 5.10. Financial Information.....................................................................     33

ARTICLE VI  REPRESENTATIONS AND WARRANTIES OF PPG........................................................     33
 Section 6.1.  Corporate Existence and Power.............................................................     33
 Section 6.2.  Authority; Execution, Delivery; Valid and Binding Agreement...............................     33
 Section 6.3.  No Breach.................................................................................     34
 Section 6.4.  Governmental Authorization................................................................     34
 Section 6.5.  Inventory.................................................................................     34
 Section 6.6.  Properties; Leases........................................................................     34
 Section 6.7.  Contracts; Required Consents..............................................................     35
 Section 6.8.  Permits...................................................................................     36
 Section 6.9.  Compliance with Laws......................................................................     36
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<TABLE>
<S>                                                                                                            <C>
 Section 6.10.   Financial Information....................................................................     36

ARTICLE VII  COVENANTS OF THE CONTRIBUTING PARTIES........................................................     37
 Section 7.1.    Required Consents........................................................................     37
 Section 7.2.    Acces....................................................................................     38
 Section 7.3.    Further Assurances.......................................................................     38
 Section 7.4.    Environmental Information................................................................     38
 Section 7.5.    Release of Security Interests............................................................     38

ARTICLE VIII  ADDITIONAL AGREEMENTS.......................................................................     39
 Section 8.1.    Diligence in Pursuit of Conditions Precedent.............................................     39
 Section 8.2.    Taxes....................................................................................     39
 Section 8.3.    Regulatory Consents......................................................................     39
 Section 8.4.    Accounts Receivable Collection...........................................................     39

ARTICLE IX  EMPLOYEE MATTERS..............................................................................     41
 Section 9.1.    Offers of Employment.....................................................................     41
 Section 9.2     Employee Benefits........................................................................     44
 Section 9.3.    Company-Defined Benefit Pension Plans....................................................     46

ARTICLE X  CONDITIONS TO CLOSING..........................................................................     48
 Section 10.1.   Conditions to Apogee's Obligations.......................................................     48
 Section 10.2.   Conditions to PPG's Obligations..........................................................     49

ARTICLE XI  SURVIVAL; INDEMNIFICATION.....................................................................     50
 Section 11.1.   Survival of Representations and Warranties...............................................     50
 Section 11.2.   Indemnification by Apogee................................................................     50
 Section 11.3.   Indemnification of Apogee by the Company.................................................     50
 Section 11.4.   Indemnification by PPG...................................................................     51
 Section 11.5.   Indemnification of PPG by the Company....................................................     52
 Section 11.6.   Procedure for Indemnification............................................................     52
 Section 11.7.   Exclusive Remedy; Adjustment.............................................................     54

ARTICLE XII  TERMINATION..................................................................................     54
 Section 12.1.   Termination..............................................................................     54
 Section 12.2.   Effect on Obligations....................................................................     54

ARTICLE XIII  MISCELLANEOUS...............................................................................     54
 Section 13.1.   Notices..................................................................................     54
 Section 13.2.   Press Releases and Announcements.........................................................     56
 Section 13.3.   Expenses.................................................................................     56
 Section 13.4    Amendments; No Waivers...................................................................     56
 Section 13.5.   Rights and Remedies Cumulative...........................................................     57
 Section 13.6    Successors and Assigns...................................................................     57
 Section 13.7.   Severability.............................................................................     57
 Section 13.8.   Counterparts.............................................................................     57
 Section 13.9.   Entire Agreement.........................................................................     57
 Section 13.10.  Governing Law............................................................................     57
 Section 13.11.  Dispute Resolution.......................................................................     57
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                     CONTRIBUTION AND ASSUMPTION AGREEMENT
                     -------------------------------------

     This CONTRIBUTION AND ASSUMPTION AGREEMENT (this "Agreement"), is dated as
of June 13, 2000, by and among PPG AUTO GLASS, LLC, a Delaware limited liability
company (the "Company"), APOGEE ENTERPRISES, INC., a Minnesota corporation
("Apogee"), THE GLASS DEPOT, INC., a Minnesota corporation ("Glass Depot"), THE
GLASS DEPOT OF NEW YORK, INC., a Minnesota corporation ("Glass Depot New York"),
HARMON GLASS COMPANY, a Minnesota corporation ("Harmon Glass"), AMERICAN
MANAGEMENT GROUP, a Maine corporation ("AMG"), DOVER GLASS COMPANY, a Maine
corporation ("Dover") and PPG INDUSTRIES, INC., a Pennsylvania corporation
("PPG").

     WHEREAS, Apogee, through its wholly owned subsidiaries, Glass Depot, Glass
Depot New York, Harmon Glass, AMG and Dover, currently is engaged in
distributing at wholesale glass parts and related supplies for sale to non-
truckload wholesalers and non-truckload retail automotive glass retailers (the
"Apogee Business").

     WHEREAS, PPG, through its branch distribution business of its U.S.
Automotive Replacement Glass business unit currently is engaged in distributing
at wholesale glass parts and related supplies for sale to non-truckload
wholesalers and non-truckload retail automotive glass retailers in the United
States (the "PPG Business").

     WHEREAS, Apogee and PPG have previously formed the Company.

     WHEREAS, Apogee, PPG and the Company are entering into this Contribution
and Assumption Agreement, pursuant to which Apogee and PPG will contribute, or
cause to be contributed, to the Company the Apogee Assets (as defined herein)
and the PPG Assets (as defined herein), respectively, in exchange for which
Apogee (or wholly owned subsidiaries of Apogee) will receive a Membership
Interest representing an Equity Percentage equal to thirty-four percent (34%) of
the Company and PPG will receive a Membership Interest representing an Equity
Percentage equal to sixty-six percent (66%) of the Company, in each case
pursuant to the PPG Auto Glass, LLC Limited Liability Company Agreement dated
the date hereof (the "LLC Agreement").

     WHEREAS, it is the intention of the parties that, after the Closing (as
defined herein), the Company will engage in the Apogee Business and the PPG
Business (the "Company Business") and the parties, or their Affiliates, as the
case may be, will enter into the Ancillary Agreements (as defined herein) with
the Company for the purpose of assisting the Company in engaging in the Company
Business.

     NOW, THEREFORE, in consideration of the premises, the mutual
representations, warranties, covenants and agreements hereinafter set forth, and
other good and valuable consideration, the receipt and adequacy of which are
hereby acknowledged, the parties hereto, intending to be legally bound, agree as
follows:
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                            Article I  Definitions
                                       -----------

     Unless the context otherwise specifies or requires, the terms defined in
this Article I shall, for the purposes of this Agreement, have the meanings
herein specified.  Certain other capitalized terms used herein are defined
elsewhere in the Agreement.

     "Affiliate" has the meaning given to it in the LLC Agreement.

     "Ancillary Agreements" means the agreements identified on Exhibit A hereto,
in each case to be executed and delivered in connection with this Agreement in
accordance with Article IV.

     "Ancillary Documents" means the Ancillary Agreements and the certificates,
instruments or other documents to be executed and delivered in connection with
this Agreement or the Ancillary Agreements.

     "Apogee Contracts" means all contracts, agreements, leases, licenses, sales
and purchase orders, commitments and other instruments of any kind, whether
written or oral, to which Apogee or any Apogee Contributing Affiliate is a party
as of the Closing Date and which relate exclusively to the Apogee Business or
which exclusively affect the Apogee Assets, including, but not limited to, the
contracts listed on Schedule 5.7(a).

     "Apogee Contributing Affiliate" means each of Glass Depot, Glass Depot New
York Harmon Glass, AMG and Dover.

     "Apogee Employee" means any full-time or part-time employee, consultant or
independent contractor of Apogee or any Apogee Contributing Affiliate whose
services relate exclusively to the Apogee Business.

     "Apogee Excluded Liabilities" means all Liabilities of Apogee or any of its
Affiliates not expressly assumed by the Company as an Apogee Assumed Liability
pursuant to Section 2.3, including without limitation all Liabilities of Apogee
or any of its Affiliates:  (i) arising out of, based upon events or
circumstances occurring in connection with or resulting from, the operation or
ownership of the Apogee Business or the Apogee Assets prior to the Closing Date
or (ii) relating to any of the Excluded Apogee Assets, except, in each case, to
the extent such Liabilities are otherwise included in the Assumed Liabilities.
Without limiting the generality of the foregoing, Apogee Excluded Liabilities
shall include, without limitation, (i) (A) any Environmental Claims or any
Environmental Remediation Costs arising out of, based on or resulting from,
conditions (including Environmental Conditions) or circumstances existing or
occurring on or prior to the Closing Date relating in any way to the Apogee
Business, the Apogee Facilities or Apogee Real Property (including, without
limitation, any violation by Apogee or any Affiliate thereof of any Applicable
Law or any permit relating to the Apogee Facilities, Apogee Business or the
Apogee Real Property), even if such conditions, Environmental Conditions or
circumstances are not discovered or an Environmental Claim with respect thereto
is not asserted until after the Closing Date and (B) any transportation of
Hazardous Materials or other materials to an off-site facility or the handling,
storage, treatment

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or disposal of Hazardous Materials or other materials at an off-site facility by
or on behalf of Apogee or any Affiliate thereof, or any Release or Threatened
Release of such Hazardous Materials or other materials occurring at any off-site
facility by or on behalf of Apogee or any Affiliate thereof arising out of,
based on or resulting from, conditions (including Environmental Conditions) or
circumstances existing or occurring on or prior to the Closing Date relating in
any way to the Apogee Business, the Apogee Facilities or Apogee Real Property
(including, without limitation, any violation by Apogee or any Affiliate thereof
of any Applicable Law or any permit relating to the Apogee Facilities, Apogee
Business or the Apogee Real Property), even if such conditions, Environmental
Conditions or circumstances are not discovered until after the Closing Date,
(ii) any obligations under the Apogee Contracts accruing prior to the Closing
Date, (iii) subject to Article IX hereof, any obligations arising under any
current or prior Employee Plan of Apogee or any Apogee Contributing Affiliate or
their respective ERISA Affiliates, (iv) any and all Liens and encumbrances
(except Permitted Liens) on any of the Apogee Assets as of the Closing Date, (v)
any and all Apogee Taxes with respect to periods (or portions thereof) ending on
or before the Closing Date, (vi) any Liabilities arising out of any suit,
action, proceeding, claim or investigation pending against or affecting the
Apogee Business, the Apogee Assets, Apogee or any Apogee Contributing Affiliate
relating to any act or omission occurring prior to the Closing Date, and (vii)
any Liabilities relating to products sold prior to the Closing Date (whether or
not distributed by the Company after the Closing Date), including, without
limitation, any product warranty and product liability claims, or any refunds,
credits, claims or other liabilities relating to the return of any products sold
prior to the Closing Date, all of which liabilities and obligations shall remain
and be obligations and liabilities solely of Apogee or the Apogee Contributing
Affiliates. Apogee Excluded Liabilities shall not include the Apogee Assumed
Liabilities expressly assumed by the Company pursuant to Section 2.3.

     "Apogee Facilities" means the offices, warehouses and buildings located on
the Apogee Owned Real Property or on the Apogee Leased Real Property, provided,
                                                                      --------
that for the avoidance of doubt, the Apogee Facilities shall not include the NDC
or any Apogee manufacturing facilities, retail auto glass locations or call
center locations.

     "Apogee Field Locations" means (i) the Apogee Facilities and (ii) all
branch distribution offices of Apogee located on properties identified on
Schedule 5.6(b).

     "Apogee Fixtures and Equipment" means all of the furniture, fixtures,
furnishings, machinery, equipment, vehicles, computer hardware, and other
tangible personal property owned or leased by Apogee or its Affiliates that is
(i) used or reserved for use exclusively in connection with the Apogee Business,
and (ii) located at the Apogee Facilities, including the fixtures and equipment
listed on Schedule 5.6(c) and excluding fixtures and equipment included in the
Excluded Apogee Assets.

     "Apogee Leased Real Property" means the real property leased, subleased or
sublicensed by Apogee or any Apogee Contributing Affiliates in connection with
the Apogee Business listed on Schedule 5.6(b), excluding the leased real
property included in the Excluded Apogee Assets.

     "Apogee Leases" means, collectively, (i) all material personal property
leases or licenses to which Apogee or any Apogee Contributing Affiliate is a
party or by which Apogee or any

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Apogee Contributing Affiliate is bound relating to the Apogee Business listed on
Schedule 5.6(d) and (ii) all leases of Apogee Leased Real Property, entered in
connection with the Apogee Business, as listed on Schedule 5.6(d), excluding any
leases and licenses included in the Excluded Apogee Assets.

     "Apogee Owned Real Property" means all real property owned by Apogee or any
Apogee Contributing Affiliate and used in connection with the Apogee Business
listed on Schedule 5.6(b), excluding any real property included in the Excluded
Apogee Assets.

     "Apogee Owned Real Property Leases" means the real property leases for the
Apogee Owned Real Property to be executed and delivered in connection with this
Agreement.

     "Apogee Real Property" includes all Apogee Owned Real Property and all
Apogee Leased Real Property, in each case together with all buildings, fixtures
and improvements erected thereon and appurtenances thereto.

     "Applicable Law" means, with respect to a Person, any domestic or foreign,
federal, state or local statute, law, ordinance, rule, administrative
interpretation, regulation, order, writ, injunction, judgment, decree or other
requirement of any Governmental Authority (including any Environmental Law)
applicable to such Person or any of its Affiliates or any of their respective
properties, assets, officers, directors, employees, consultants or agents (in
connection with such officer's, director's, employee's, consultant's or agent's
activities on behalf of such Person or any of its Affiliates).

     "BONY Security Agreement" means the Security Agreement dated as of June 13,
2000 by and among Apogee, certain Affiliates of Apogee, and The Bank of New
York.

     "Books and Records" of a Contributing Party means all business records,
tangible data, documents, management information systems, files, customer lists,
supplier lists, operation or maintenance manuals, bids, personnel records,
invoices, sales literature, and all other books and records (collectively,
"Information"), in each case to the extent related solely to the Apogee Business
or the PPG Business, as applicable, at any time prior to the Closing Date;
provided, however, that "Books and Records" shall exclude (i) all tax returns
--------  -------
and all worksheets, notes, files or documents primarily related thereto,
wherever located, (ii) all documents prepared in connection with the
transactions contemplated by this Agreement and all minute books and corporate
records of that Contributing Party and its Affiliates, (iii) all Information of
that Contributing Party or its Affiliates to the extent not related to the
Apogee Business or the PPG Business, as applicable, (iv) any Excluded Assets or
Excluded Liabilities, (v) all documents payroll records for periods prior to the
Closing and (vi) any Information which is prohibited from being transferred by
Applicable Law.

     "Code" means the Internal Revenue Code of 1986, as amended.

     "Contracts" means the Apogee Contracts and the PPG Contracts, as
applicable.

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     "Contributed Assets" means with respect to Apogee as the Contributing
Party, the Apogee Assets, and with respect to PPG as the Contributing Party, the
PPG Assets, or with respect to PPG and Apogee together as Contributing Parties,
the Apogee Assets and the PPG Assets, as the context requires.

     "Contributed Business" means with respect to Apogee as the Contributing
Party, the Apogee Business, and with respect to PPG as the Contributing Party,
the PPG Business.

     "Contributing Party" shall mean Apogee or PPG, as the context requires.

     "Employee Other Benefit Plans" means all employee benefit plans, contracts,
agreements, practices, policies or arrangements, written or oral, and whether or
not subject to ERISA, which a Person maintains, contributes to, or is a party to
or otherwise has or could have any obligation under or with respect to,
including, without limitation, the following plans:  all employment, vacation,
severance, change-in-control and fringe benefit plans; all stock option, stock
bonus, and stock purchase programs; all retirement income, bonus, profit
sharing, gain sharing, deferred compensation, retention bonus or other similar
plans, other than Employee Pension Plans or Employee Welfare Plans.

     "Employee Pension Plans" means "employee pension benefit plans" (as that
term is defined in Section 3(2) of ERISA).

     "Employee Plans" means all Employee Welfare Plans, Employee Pension Plans
and Employee Other Benefit Plans.

     "Employee Transfer Date" means the first day of the month immediately
following the Lease Termination Date.

     "Employee Welfare Plans" means "employee welfare benefit plans" (as that
term is defined in Section 3(1) of ERISA).

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

     "ERISA Affiliate" of any Person means any other Person that, together with
such Person as of the relevant measuring date under ERISA, was or is required to
be treated as a single employer under Section 414 of the Code.

     "Environmental Claims" means any and all Liabilities, claims, suits,
losses, Environmental Losses (including, without limitation, remediation,
removal, response, mitigation, abatement, cleanup, investigative and/or
monitoring costs and any other related costs and expenses), other causes of
action or enforcement actions recognized now or at any later time, damages,
settlements, expenses, charges, assessments, liens, penalties, fines,
prejudgment and postjudgment interest and reasonable attorneys' fees (i)
pursuant to any agreement, order, notice, requirement, injunction, judgment or
similar documents (including settlements) arising out of or in connection with
any Environmental Conditions or Environmental Laws, and (ii) pursuant to any
claim by a Governmental Authority or other Person or entity for personal injury,
real or

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personal property damage, damage to natural resources, remediation, or similar
costs or expenses incurred or asserted by such entity or Person pursuant to
common law, statute, or any Environmental Conditions or Environmental Laws.

     "Environmental Conditions" means any conditions affecting the state of the
environment or workplace health or safety, including natural resources (e.g.,
flora and fauna), soil, surface water, groundwater, any present or potential
drinking water supply, subsurface strata or ambient air, and which relate to or
arise out of the use, handling, storage, treatment, recycling, generation,
transportation, Release, Threatened Release or disposal of Hazardous Materials
by any Contributing Party or any of their respective predecessors.

     "Environmental Laws" shall mean all U.S. and national, federal, state,
local and foreign laws, statutes, regulations, codes, ordinances and other
provisions having the force or effect of law, all judicial and administrative
orders and determinations and all common law concerning public health, worker
health and safety and pollution or protection of the environment, natural
resources, air quality, soil quality, water quality, hazardous waste, hazardous
or toxic substances or the protection of human health or the environment,
including without limitation, the Comprehensive Environmental Response,
Compensation and Liability Act ("CERCLA") (42 U.S.C. (S) 9601 et seq.), as
                                                              -- ---
amended, the Superfund Amendments and Reauthorization Act of 1986 ("SARA") (Pub.
L. No. 99-499, October 17, 1986), as amended, the Federal Water Pollution
Control Act (33 U.S.C. (S) 1251 et seq.), as amended, the Safe Drinking Water
                                -- ---
Act (42 U.S.C. (S) 201 et seq.), as amended, the Resource Conservation and
                       -- ---
Recovery Act ("RCRA") (42 U.S.C. (S) 6901 et seq.), as amended, the Clean Air
               ----                       -- ---
Act (42 U.S.C. (S) 7401 et seq.), as amended, and the Toxic Substances Control
                        -- ---
Act ("TSCA") (15 U.S.C. (S) 2601 et seq.), as amended, the Hazardous Material
                                 -- ---
Transportation Act ("HMTA") (49 U.S.C. (S) 1801 et seq.), as amended, the
                                                -- ---
Federal Insecticide Fungicide and Rodenticide Act (7 U.S.C. 136 et seq.), as
                                                                -- ---
amended, the Occupational Safety and Health Act (29 U.S.C. (S) 651 et seq.), as
                                                                   -- ---
amended, and any analogous national, foreign, state or local laws, statutes,
codes, ordinances and the regulations promulgated pursuant thereto, as each of
these laws may have been amended through the date of this Agreement and all
those relating to the presence, use, production, generation, handling,
transportation, treatment, storage, disposal, distribution, labeling, testing,
processing, discharge, Release, Threatened Release, control, or cleanup of any
hazardous materials, substances or wastes, chemical substances or mixtures,
pesticides, pollutants, Hazardous Materials, toxic chemicals, petroleum products
or byproducts, asbestos, polychlorinated biphenyls, noise or radiation, each as
amended and as now, or to the extent applicable to facts or circumstances
existing prior to or as at the Closing Date.

     "Environmental Losses" shall mean (i) all Losses resulting from the
manufacture, generation, refining, processing, distribution, use, sale,
treatment, receipt, storage, disposal, transportation or handling, or the
emission, discharge, Release or Threatened Release into the environment of any
Hazardous Material at any Apogee Real Property or PPG Real Property, as the case
may be, in violation of any Environmental Laws and (ii) all Losses resulting
from the presence of any Hazardous Materials at any location other than the
Apogee Real Property or PPG Real Property, as the case may be, containing
Hazardous Materials disposed of from the Apogee Real Property or PPG Real
Property, as the case may be, or any off-site migration,

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leaking, leaching, flowing, emitting or other movement of Hazardous Materials
from any such location.

     "Environmental Remediation Costs" means all costs and expenses relating to
activities or actions required by Environmental Laws, orders by a Governmental
Authority or environmental, health and safety policies adopted by the Company in
accordance with the terms of the LLC Agreement, to (i) clean up or remove
Hazardous Materials from the environment, (ii) prevent, minimize or mitigate the
movement, leaching, Release, Threatened Release, or migration of Hazardous
Materials into the environment, or mitigate the injury or damage therefrom,
(iii) clean up, remediate or close any Apogee Facility or PPG Facility, as the
case may be, or any Apogee Real Property or PPG Real Property, as the case may
be, or (iv) comply with the requirements of any Environmental Laws or permits
relating to any Apogee Facility, PPG Facility, Apogee Real Property or PPG Real
Property, as the case may be.  Environmental Remediation Costs include, without
limitation, reasonable costs and expenses payable in connection with the
foregoing for legal, engineering or other related services; for investigation,
testing, sampling and monitoring; for boring, excavation and construction; for
removal, modification or replacement of equipment or facilities; for labor and
material; and for proper storage, treatment or disposal of Hazardous Materials.

     "Equity Percentage" has the meaning given to it in the LLC Agreement.

     "Excluded Liabilities" means the Apogee Excluded Liabilities and the PPG
Excluded Liabilities.

     "Facilities" means the Apogee Facilities and the PPG Facilities.

     "GAAP" means generally accepted accounting principles in the United States,
consistently applied.

     "Governmental Authority" means any foreign, domestic, federal, territorial,
state or local governmental authority, quasi-governmental authority, law
enforcement authority, instrumentality, court, government or self-regulatory
organization, commission, tribunal or organization or any regulatory,
administrative or other agency, or any political or other subdivision,
department or branch of any of the foregoing.

     "Hazardous Materials" means each and every element, compound, chemical
mixture, contaminant, pollutant, material (including, without limitation,
asbestos, petroleum and petroleum products, mercury, chromium, lead and
polychlorinated biphenyls), waste or other substance which is defined,
determined or identified as hazardous or toxic under any Applicable Law or the
Release or Threatened Release of which is prohibited under any Applicable Law.
Without limiting the generality of the foregoing, the term will include (i)
"hazardous substances" as defined in CERCLA and regulations promulgated
thereunder, (ii) "extremely hazardous substances" as defined in SARA, each as
amended, and regulations promulgated thereunder, (iii) "hazardous waste" as
defined in RCRA, and regulations promulgated thereunder, (iv) "hazardous
materials" as defined in the HMTA and regulations promulgated thereunder and

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<PAGE>

(v) "chemical substance or mixture" as defined in the TSCA and regulations
promulgated thereunder.

     "HSR Act" means the Hart-Scott-Rodino Antitrust Improvements Act of 1976,
as amended, and the rules and regulations thereunder.

     "Inventory" of a Contributing Party means all inventory (excluding products
shipped prior to the Closing Date but not invoiced) relating to the Apogee
Business or the PPG Business, as applicable, held for resale and all raw
materials, work in process, finished products, wrapping supply and packaging
items and similar items with respect to the Apogee Business or the PPG Business,
as applicable, in each case wherever the same may be located, unless otherwise
specified in this Agreement; it being understood that the Contributing Parties
shall be responsible to invoice customers for products sold prior to the Closing
Date.

     "IRS" means the Internal Revenue Service.

     "Judgment" includes any judicial or administrative judgment, order, writ,
injunction, decree or award.

     "Leased Employees Agreements" means the Apogee Leased Employees Agreement
and the PPG Leased Employees Agreement.

     "Leased Real Property" means the Apogee Leased Real Property and the PPG
Leased Real Property.

     "Leasing Period Termination Date" means the last day of the month occurring
at least sixty (60) days following the Closing Date.

     "Liability" means, with respect to any Person, any liability, expense or
obligation of such Person of any kind, character or description, whether known
or unknown, absolute or contingent, accrued or unaccrued, liquidated or
unliquidated, secured or unsecured, joint or several, due or to become due,
vested or unvested, executory, determined, determinable or otherwise and whether
or not the same is required to be accrued on the financial statements of such
Person.

     "Lien" includes any mortgage, lien, pledge, security interest, conditional
sale agreement, charge, claim, easement, right, condition, restriction or other
encumbrance or defect of title of any nature whatsoever (including without
limitation, any assessment, charge or other type of notice which is levied or
given by any Governmental Authority and for which a lien could be filed).

     "Losses" means any and all costs, losses, Taxes, Liabilities, damages,
lawsuits, deficiencies, claims, demands, and expenses (whether or not arising
out of third-party claims), including without limitation interest, penalties,
costs of mitigation, losses in connection with any Environmental Law (including
without limitation any clean-up or remedial action), losses resulting from any
shutdown or curtailment of operations, damages to the environment,

                                       8
<PAGE>

reasonable attorneys' fees and all amounts paid in investigation, defense or
settlement of any of the foregoing.

     "Material Adverse Effect on Apogee" or "Material Adverse Change to Apogee"
or similar phrase means a material adverse change in, or effect on, (a) the
business, operations, affairs, financial condition, results of operations,
assets, Liabilities, reserves or any other aspect of the Apogee Assets or the
Apogee Business, taken as a whole, or (b) the right or ability of Apogee or any
Apogee Contributing Affiliate to consummate any of the transactions contemplated
hereby.

     "Material Adverse Effect on the Company or Material Adverse Change to the
Company" or similar phrase means any facts or circumstances that would result in
a material adverse change in, or effect on, the business, operations, affairs,
financial condition, results of operations, assets, Liabilities, reserves or any
other aspect of the Company, taken as a whole, assuming consummation of the
transactions contemplated hereby.

     "Material Adverse Effect on PPG" or "Material Adverse Change to PPG" or
similar phrase means a material adverse change in, or effect on, (a) the
business, operations, affairs, financial condition, results of operations,
assets, Liabilities, reserves or any other aspect of the PPG Assets or the PPG
Business, taken as a whole, or (b) the right or ability of PPG to consummate any
of the transactions contemplated hereby.

     "Members" has the meaning given to it in the LLC Agreement.

     "Membership Interest" has the meaning given to it in the LLC Agreement.

     "NDC" means the national distribution center of Apogee located in Owatonna,
Minnesota.

     "Owned Real Property" means the Apogee Owned Real Property and the PPG
Owned Real Property.

     "Owned Real Property Leases" means the Apogee Owned Real Property Leases
and the PPG Owned Real Property Leases.

     "Permitted Liens" means (a) Liens for Taxes or charges or claims by a
Governmental Authority (i) not yet due and payable or (ii) being contested in
good faith, if a reserve or other appropriate provision, if any, as shall be
required by GAAP shall have been made therefor, (b) statutory Liens of
landlords, Liens of carriers, warehousemen, mechanics and materialmen and other
Liens imposed by law incurred in the ordinary course of business for sums (i)
not yet due and payable or (ii) being contested in good faith, if a reserve or
other appropriate provision, if any, as shall be required by GAAP shall have
been made therefor, (c) Liens incurred or deposits made in connection with
workers' compensation, unemployment insurance and other similar types of social
security programs or to secure the performance of tenders, statutory
obligations, surety and appeal bonds, bids, leases, government contracts,
performance and return of money bonds and similar obligations, in each case in
the ordinary course of business, consistent with past practice, (d) easements,
rights of way and other imperfections of title or

                                       9
<PAGE>

encumbrances that are a matter of public record and do not materially affect the
marketability of the property subject thereto or materially interfere with the
present or proposed use of such property and (e) other encumbrances or minor
matters that individually or in the aggregate are not substantial in amount and
do not detract from or interfere with the value or the present or intended use
of the Contributed Asset(s) to which such encumbrance(s) relate(s).

     "Person" means and includes an individual, a corporation, a partnership, a
limited liability company, a trust, an unincorporated organization, a government
or any department or agency thereof, or any entity similar to any of the
foregoing.

     "PPG Contracts" means all contracts, agreements, leases, licenses, sales
and purchase orders, commitments and other instruments of any kind, whether
written or oral, to which PPG is a party as of the Closing Date and which relate
exclusively to the PPG Business or which exclusively affect the PPG Assets,
including, but not limited to, the contracts listed on Schedule 6.7(a).

     "PPG Employee" means any full-time or part-time employee, consultant or
independent contractor of PPG whose services relate exclusively to the PPG
Business.

     "PPG Excluded Liabilities" means all Liabilities of PPG or any of its
Affiliates not expressly assumed by the Company as a PPG Assumed Liability
pursuant to Section 2.3, including without limitation all Liabilities of PPG or
any of its Affiliates:  (i) arising out of, based upon events or circumstances
occurring in connection with or resulting from the operation or ownership of the
PPG Business or the PPG Assets prior to the Closing Date or (ii) relating to any
of the Excluded PPG Assets, except, in each case, to the extent such Liabilities
are otherwise included in the Assumed Liabilities.  PPG Excluded Liabilities
shall include, without limitation, (i) (A) any Environmental Claims or any
Environmental Remediation Costs arising out of, based on or resulting from,
conditions (including Environmental Conditions) or circumstances existing or
occurring on or prior to the Closing Date relating in any way to the PPG
Business, the PPG Facilities or PPG Real Property (including, without
limitation, any violation by PPG or any Affiliate thereof of any Applicable Law
or any permit relating to the PPG Facilities, PPG Business or the PPG Real
Property), even if such conditions, Environmental Conditions or circumstances
are not discovered or an Environmental Claim with respect thereto is not
asserted until after the Closing Date and (B) any transportation of Hazardous
Materials or other materials to an off-site facility or the handling, storage,
treatment or disposal of Hazardous Materials or other materials at an off-site
facility by or on behalf of PPG or any Affiliate thereof, or any Release or
Threatened Release of such Hazardous Materials or other materials occurring at
any off-site facility by or on behalf of PPG or any Affiliate thereof arising
out of, based on or resulting from, conditions (including Environmental
Conditions) or circumstances existing or occurring on or prior to the Closing
Date relating in any way to the PPG Business, the PPG Facilities or PPG Real
Property (including, without limitation, any violation by PPG or any Affiliate
thereof of any Applicable Law or any permit relating to the PPG Facilities, PPG
Business or the PPG Real Property), even if such conditions, Environmental
Conditions or circumstances are not discovered until after the Closing Date,
(ii) any obligations under the PPG Contracts accruing prior to the Closing Date,
(iii) subject to Article IX hereof, any obligations arising under any current or
prior Employee Plan of PPG or its ERISA Affiliates, (iv) any and all

                                       10
<PAGE>

Liens and encumbrances (except Permitted Liens) on any of the PPG Assets as of
the Closing Date, (v) any and all PPG Taxes with respect to periods (or portions
thereof) ending on or before the Closing Date, (vi) any Liabilities arising out
of any suit, action, proceeding, claim or investigation pending against or
affecting the PPG Business, the PPG Assets or PPG relating to any act or
omission occurring prior to the Closing Date, and (vii) any Liabilities relating
to products sold prior to the Closing Date (whether or not distributed by the
Company after the Closing Date), including, without limitation, any product
warranty and product liability claims, or any refunds, credits, claims or other
liabilities relating to the return of any products sold prior to the Closing
Date, all of which liabilities and obligations shall remain and be obligations
and liabilities solely of PPG. Notwithstanding the foregoing, the PPG Excluded
Liabilities shall not include the PPG Assumed Liabilities expressly assumed by
the Company pursuant to Section 2.3.

     "PPG Facilities" means the offices, warehouses and facilities located on
the PPG Owned Real Property or PPG Leased Real Property; provided, that for the
avoidance of doubt, the PPG Facilities shall not include the PPG manufacturing
facilities including Chillicothe, Ohio and any central distribution centers.

     "PPG Field Locations" means (i) the PPG Facilities and (ii) all branch
distribution offices of the PPG Business located on properties identified on
Schedule 6.6(b).

     "PPG Fixtures and Equipment" means all of the furniture, fixtures,
furnishings, machinery, equipment, vehicles, computer hardware, and other
tangible personal property owned or leased by PPG or its Affiliates that is (i)
used or reserved for use exclusively in connection with the PPG Business, and
(ii) located at the PPG Facilities; including the fixtures and equipment listed
on Schedule 6.6(c) and excluding fixtures and equipment included in the Excluded
PPG Assets.

     "PPG Leased Real Property" means the real property leased, subleased or
sublicensed by PPG in connection with the PPG Business listed on Schedule 6(b),
excluding the leased real property included in the Excluded PPG Assets.

     "PPG Leases" means, collectively, (i) all material personal property leases
or licenses to which PPG is a party or by which PPG is bound relating to the PPG
Business listed on Schedule 6(d), and (ii) all leases of PPG Leased Real
Property, entered in connection with the PPG Business, as listed on Schedule
6(d), excluding any leases and licenses included in the Excluded PPG Assets.

     "PPG Owned Real Property" means the real property owned by PPG and used in
connection with the PPG Business listed on Schedule 6(b), excluding any real
property included in the Excluded PPG Assets.

     "PPG Owned Real Property Leases" means the real property leases for the PPG
Owned Real Property to be executed and delivered in connection with this
Agreement.

                                       11
<PAGE>

     "PPG Owned Trucks" means the delivery trucks owned by PPG and used
exclusively in connection with the PPG Business.

     "PPG Real Property" includes all PPG Owned Real Property and all PPG Leased
Real Property, in each case together with all buildings, fixtures and
improvements erected thereon and appurtenances thereto.

     "Prepaid Expenses" means the prepaid charges and expenses of a Contributing
Party, including, without limitation, any such charges and expenses with respect
to ad valorem taxes, leases and rentals and utilities, but excluding any prepaid
insurance premiums.

     "Proceedings" means actions, suits, hearings, arbitrations, proceedings
(public or private) or investigations that have been brought by or against any
Governmental Authority or any other Person.

     "Release" or "Threatened Release" shall have the meaning given to such
terms in CERCLA and regulations promulgated thereto.

     "Representative" means any officer, director, principal, attorney, agent,
employee or other representative.

     "Required Consents" means the Required Apogee Contractual Consents and the
Required PPG Contractual Consents.

     "Taxes" means all taxes, charges, fees, levies, or other assessments,
including, without limitation, all net income, gross income, gross receipts,
value added, sales, use, ad valorem, transfer, franchise, profits, license,
withholding, payroll, employment, social security, unemployment, excise,
estimated, severance, stamp, occupation, property, or other taxes, customs
duties, fees, assessments, or charges of any kind whatsoever, including, without
limitation, all interest and penalties thereon, and additions to tax or
additional amounts imposed by any Governmental Authority, domestic or foreign,
responsible for the imposition of any such tax.

     "Tax Returns" means all returns, declarations, reports, estimates,
information returns, and statements, forms or other information required to be
filed with respect to any Tax.

     "Unrealized Increment" means  internal profit that is generated by
transferring inventoriable product within a company at a transfer price which
exceeds inventoriable cost; the amount of such Unrealized Increment is the
difference between inventoriable cost at the producing/shipping unit and the
inventoriable cost at the receiving unit, less applicable freight.

                                       12
<PAGE>

     In addition to those terms defined above, the following terms shall have
the respective meanings given thereto in the sections indicated below:

<TABLE>
<CAPTION>
          Term                                             Section
          ----                                             -------
          <S>                                              <C>

          AMG                                              Recitals
          Agreement                                        Recitals
          Apogee                                           Recitals
          Apogee Assets                                         2.1
          Apogee Assumed Liabilities                            2.3
          Apogee Business                                  Recitals
          Apogee Indemnified Parties                           11.3
          Apogee Leased Employees Agreement                     4.4
          Apogee Leased Real Property                           5.6
          Apogee Permits                                        5.8
          Apogee Transition Services Agreement                  4.3
          Apogee Taxes                                          2.5
          Assumed Liabilities                                   2.3
          Claimant                                             11.6
          Closing                                               4.1
          Closing Date                                          4.1
          Closing Date Contribution Balance Sheet               3.2
          Closing Date Net Assets                               3.2
          Closing Date Receivables                              8.4
          Closing Date Relative Asset Percentage                3.2
          Common Obligor                                        8.4
          Company                                          Recitals
          Company/Apogee Indemnified Parties                   11.4
          Company Business                                 Recitals
          Company Defined Benefit Plans                         9.3
          Company Fund                                          9.3
          Company Nonqualified Plan                             9.3
          Company/PPG Indemnified Parties                      11.2
          Contract Restructuring                                7.1
          Contributed Business Employees                        9.1
          Contribution Consideration                            3.1
          Contribution Equalization Payment                     3.2
          Contribution Excess                                   3.2
          Contribution Shortfall                                3.2
          Curvlite Supply Agreement                             4.2
          Dispute                                             13.11
          Dover                                            Recitals
          Environmental Information                             7.4
          Excluded Apogee Assets                                2.2
          Excluded Assets                                       2.2
          Excluded PPG Assets                                   2.2
</TABLE>

                                       13
<PAGE>
<TABLE>
          <S>                                                   <C>
          Expert                                                3.3
          Final Closing Date Contribution Balance Sheet         3.2
          Glass Depot                                      Recitals
          Glass Depot New York                             Recitals
          Harmon Glass Supply Agreement                         4.2
          Harmon Glass                                     Recitals
          Indemnifying Party                                   11.6
          Inventory Sampling List                               3.2
          June 2000 Trial Balance                               3.2
          LLC Agreement                                    Recitals
          Leased Employees                                      9.2
          Leasing Period                                        9.1
          NDC Transition Agreement                              4.4
          Objection                                             3.2
          Physical Inventory Tolerance                          3.2
          PPG                                              Recitals
          PPG Assets                                            2.1
          PPG Assumed Liabilities                               2.3
          PPG Business                                     Recitals
          PPG Consent to Security Interest                      4.3
          PPG Credit Agreement                                  4.2
          PPG Defined Benefit Plans                             9.3
          PPG Greensboro Plan                                   9.3
          PPG Indemnified Parties                              11.5
          PPG Lansing Plan                                      9.3
          PPG Leased Employees Agreement                        4.5
          PPG Memphis Plan                                      9.3
          PPG Nonqualified Plan                                 9.3
          PPG Nonunion Hourly Plan                              9.3
          PPG Salaried Plan                                     9.3
          PPG Services Agreement                                4.5
          PPG Supply Agreement                                  4.2
          PPG Taxes                                             2.5
          PPG Transition Services Agreement                     4.5
          Requested Contributing Party                          3.2
          Requesting Contributing Party                         3.2
          Required Apogee Contractual Consent                   5.8
          Sampling Date                                         3.2
          Sampling Locations                                    3.2
          10/31 Net Assets                                      3.2
          10/31 Contribution Balance Sheet                      3.2
          10/31 Relative Asset Percentage                       3.2
          Transferred Employees                                 9.1
          Union Employees                                       9.1
</TABLE>

                                       14
<PAGE>

                                  Article II
               Contribution of Assets; Assumption of Liabilities
               -------------------------------------------------

     Section 2.1.  Agreement to Contribute and Accept.  Upon the terms and
                   ----------------------------------
subject to the conditions of this Agreement and in reliance upon the
representations, warranties and agreements herein set forth, the Contributing
Parties shall initially contribute to the Company the following:

            (a)    Apogee shall, and shall cause its Apogee Contributing
     Affiliates to, convey, transfer, assign and deliver to the Company on the
     Closing Date, and the Company shall accept from Apogee or such Apogee
     Contributing Affiliates, free and clear of all Liens, other than Permitted
     Liens, and not subject to any Liabilities or obligations other than the
     Assumed Liabilities, all of Apogee's (or such Apogee Contributing
     Affiliate's) right, title and interest in the assets that are (y) used or
     reserved for use exclusively in the operation of the Apogee Business and
     are located at the Apogee Field Locations, or (z) specifically identified
     on Schedule 2.1(a) hereof, except to the extent included in the Excluded
     Apogee Assets (collectively, the "Apogee Assets"), including, without
     limitation, all of Apogee's (or such Apogee Contributing Affiliate's)
     right, title and interest in the following assets to the extent used or
     reserved for use exclusively in the operation of the Apogee Business:

               (i)    Apogee Fixtures and Equipment;

               (ii)   Apogee Contracts;

               (iii)  Subject to Section 3.2 and Section 3.3, Inventory used
          exclusively in the operation of the Apogee Business and located at the
          Apogee Field Locations;

               (iv)   Prepaid Expenses relating exclusively to the Apogee
          Business;

               (v)    Apogee Facilities;

               (vi)   Apogee Leases;

               (vii)  All of Apogee's or any Apogee Contributing Affiliate's
          rights, claims, credits, causes of action or rights of setoff against
          third parties exclusively relating to insurance coverage covering or
          relating to the Apogee Business with respect to events occurring or
          claims arising prior to the Closing Date, but only to the extent such
          coverage and any proceeds therefrom covers or relates to any of the
          Assumed Liabilities or any pre-Closing liabilities or obligations of
          the Apogee Business to which the Company becomes subject
          notwithstanding the provisions of this Agreement;

               (viii) All of Apogee's or any Apogee Contributing Affiliate's
          rights, claims, credits, causes of action or rights of setoff against
          third parties exclusively

                                       15
<PAGE>

          relating to the Apogee Business, whether liquidated or unliquidated,
          fixed or contingent, including claims pursuant to all warranties,
          representations and guaranties made by suppliers, manufacturers,
          contractors and other third parties in connection with products or
          services purchased by or furnished to Apogee or such Apogee
          Contributing Affiliate in connection with the Apogee Business and
          affecting any of the Apogee Assets, but excluding any such rights,
          claims, credits, causes of action or rights of setoff to the extent
          they relate to the Excluded Apogee Assets or the Apogee Excluded
          Liabilities;

               (ix)   All franchises, licenses, permits or other authorizations
          issued or granted by any Governmental Authority that are owned by,
          granted to or held or used by Apogee or any Apogee Contributing
          Affiliate exclusively in connection with the Apogee Business, in each
          case to the extent transferable;

               (x)    All Books and Records of Apogee and the Apogee
          Contributing Affiliates relating exclusively to the Apogee Business,
          provided, that Apogee or the applicable Apogee Contributing Affiliate
          --------
          shall have the option to retain any such Books and Records contingent
          on providing the Company with copies of such Books and Records;

               (xi)   Receivables identified on Schedule 2.1(a)(xi) as of the
          Closing Date, which receivables will be reflected on the Closing Date
          Contributed Balance Sheet of Apogee prepared in accordance with
          Section 3.2; provided, that Apogee shall not have written off such
                       --------
          receivables, nor taken any reserve against such receivables, on the
          Closing Date Contributed Balance Sheet; and

               (xii)  Except for the Excluded Apogee Assets, all other assets
          and properties of Apogee or any Apogee Contributing Affiliate to the
          extent used in exclusively the Apogee Business.

     In no event shall "Apogee Assets" include any of the Excluded Apogee
     Assets.

          (b)  PPG shall convey, transfer, assign and deliver to the Company on
     the Closing Date, and the Company shall accept from PPG, free and clear of
     all Liens, other than Permitted Liens, and not subject to any Liabilities
     or obligations other than the Assumed Liabilities, all of PPG's right,
     title and interest in the assets that are (y) used or reserved for use
     exclusively in the operation of the PPG Business and are located at the PPG
     Field Locations or (z) specifically identified on Schedule 2.1(b) hereto,
     except to the extent included in the Excluded PPG Assets (collectively, the
     "PPG Assets"), including, without limitation, all of PPG's right, title and
     interest in the following assets to the extent used exclusively in the
     operation of the PPG Business:

               (i)    PPG Fixtures and Equipment;

               (ii)   PPG Contracts;

                                       16
<PAGE>

               (iii)  Subject to Section 3.2 and Section 3.3, Inventory used
          exclusively in the operation of the PPG Business and located at the
          PPG Field Locations (which Inventory shall be contributed net of any
          Unrealized Increment and LIFO amount taken as a reserve with respect
          to such Inventory reflected in PPG's Books and Records);

               (iv)   Prepaid Expenses relating exclusively to the PPG Business;

               (v)    PPG Facilities;

               (vi)   PPG Leases;

               (vii)  All of PPG's rights, claims, credits, causes of action or
          rights of setoff against third parties exclusively relating to
          insurance coverage covering or relating to the PPG Business with
          respect to events occurring or claims arising prior to the Closing
          Date, but only to the extent such coverage and any proceeds therefrom
          covers or relates to any of the Assumed Liabilities or any pre-Closing
          liabilities or obligations of the PPG Business to which the Company
          becomes subject notwithstanding the provisions of this Agreement;

               (viii) All of PPG's rights, claims, credits, causes of action or
          rights of setoff against third parties relating exclusively to the PPG
          Business, whether liquidated or unliquidated, fixed or contingent,
          including claims pursuant to all warranties, representations and
          guaranties made by suppliers, manufacturers, contractors and other
          third parties in connection with products or services purchased by or
          furnished to PPG in connection with the PPG Business and affecting any
          of the PPG Assets, but excluding any such rights, claims, credits,
          causes of action or rights of setoff to the extent they relate to the
          Excluded PPG Assets or the PPG Excluded Liabilities;

               (ix)   All franchises, licenses, permits or other authorizations
          issued or granted by any Governmental Authority that are owned by,
          granted to or held or used by PPG exclusively in connection with the
          PPG Business, whether or not actually utilized by PPG, in each case to
          the extent transferable;

               (x)    All Books and Records of PPG relating exclusively to the
          PPG Business, provided, that PPG shall have the option to retain any
                        --------
          such Books and Records contingent on providing the Company with copies
          of such Books and Records;

               (xi)   Receivables identified on Schedule 2.1(b)(xi) as of the
          Closing Date, which receivables will be reflected on the Closing Date
          Contributed Balance Sheet of PPG prepared in accordance with Section
          3.2; provided, that PPG shall not have written off such receivables,
               --------
          nor taken any reserve against such receivables, on the Closing Date
          Contribution Balance Sheet; and

                                       17
<PAGE>

               (xii)  Except for the Excluded PPG Assets, all other assets and
          properties of PPG to the extent used exclusively in the PPG Business.

     In no event shall "PPG Assets" include any of the Excluded PPG Assets.

     Section 2.2.  Excluded Assets.  The Contributed Assets shall not include
                   ---------------
the following specifically enumerated Excluded Assets:

             (a)   Apogee, including any Affiliate of Apogee (including the
     Apogee Contributing Affiliates), shall not contribute (i) any shares of
     Common Stock of any Apogee Contributing Affiliate, (ii) any accounts
     receivable relating to or arising in connection with the Apogee Business
     prior to the Closing (except receivables to be contributed to the Company
     pursuant to Section 2.1(a)(xi)), but subject to the Company's obligations
     in respect of collecting accounts receivable of the Apogee Business
     pursuant to Section 8.4, (iii) any computer hardware or software not used
     exclusively in the Apogee Business and any computer hardware or software
     located at the headquarters facilities of Apogee (regardless of whether
     such software or hardware is used exclusively in the Apogee Business), (iv)
     all rights and interests under (including those of sponsor and
     administrator, as applicable), and all assets of, any employee benefit plan
     maintained by Apogee or its Affiliates, or ERISA Affiliates, including,
     without limitation, any Employee Plan, except to the extent otherwise
     explicitly provided in accordance with Article IX hereof, (v) any Apogee
     Contracts and any Apogee Leases not used exclusively in the Apogee
     Business, (vi) any Apogee Contract or Apogee Leases for which Required
     Consents were not obtained as of the Closing Date (it being understood that
     the benefits and obligations of such Apogee Contracts and Apogee Leases
     shall be assigned to the Company to the extent such contract has been
     restructured as contemplated by Section 7.1 hereof and such Contracts will
     be assigned to the Company if the Required Consents relating thereto are
     obtained after Closing); (vii) all Apogee franchise tax registrations and
     sales and use tax permits, (viii) all Apogee Tax refunds and credits
     attributable to periods (or portions thereof) ending on or before the
     Closing, (ix) all of Apogee and its Affiliates' rights, claims, credits,
     causes of action or rights of setoff against third parties relating to
     insurance coverage covering the Apogee Business with respect to events
     occurring or claims arising prior to the Closing Date, except to the extent
     included in the Apogee Assets pursuant to Section 2.1(a)(vii), (x) cash
     (other than petty cash located at the Field Locations), bank accounts, cash
     equivalents and other similar types of investments, certificates of
     deposit, U.S. Treasury bills and other marketable securities that exist on
     the Closing Date, (xi) any assets of Apogee or its Affiliates used in the
     performance of the Ancillary Agreements to which Apogee or any such
     Affiliate is a party, (xii) the NDC or the NDC Inventory (as defined in the
     NDC Transition Agreement) and all assets, including inventory, of
     Viracon/Curvlite, Inc., (xiii) any and all assets, including inventory, of
     or relating to the retail operations of the Harmon Retail and Harmon
     Solutions business units of Harmon Glass, (xiv) any lease relating to real
     property used for regional managers or equivalent positions, and corporate
     headquarters locations unless such lease is identified on Schedule 5.6(b),
     (xv) all trademarks and tradenames, (xvi) all web sites and domain names
     and (xvii) assets relating to any

                                       18
<PAGE>

     Apogee Facilities shut down prior to the date hereof (collectively, the
     "Excluded Apogee Assets").

             (b)   PPG, including any Affiliate of PPG, shall not contribute (i)
     any accounts receivable relating to or arising in connection with the PPG
     Business prior to the Closing (except receivables to be contributed to the
     Company pursuant to Section 2.1(b)(xi)) subject to the Company's
     obligations in respect of collecting accounts receivable of the PPG
     Business pursuant to Section 8.4; (ii) any computer hardware or software
     not used exclusively in the PPG Business and any computer hardware or
     software not located at the PPG Facilities (regardless of whether such
     software or hardware is used exclusively in the PPG Business), (iii) all
     rights and interests under (including those of sponsor and administrator,
     as applicable), and all assets of, any employee benefit plan maintained by
     PPG or its Affiliates, or ERISA Affiliates, including, without limitation,
     any Employee Plan, except to the extent otherwise explicitly provided in
     accordance with Article IX hereof, (iv) any PPG Contracts and any PPG
     Leases not used exclusively in the PPG Business, (v) any PPG Contract or
     PPG Leases for which Required Consents were not obtained as of the Closing
     Date (it being understood that the benefits and obligations of such PPG
     Contracts and PPG Leases shall be assigned to the Company to the extent
     such contract has been restructured as contemplated by Section 7.1 hereof
     and such Contracts will be assigned to the Company if the Required Consents
     relating thereto are obtained after Closing); (vi) all PPG franchise tax
     registrations and sales and use tax permits, (vii) all PPG Tax refunds and
     credits attributable to periods (or portions thereof) ending on or before
     the Closing, (viii) all of PPG or its Affiliates' rights, claims, credits,
     causes of action or rights of setoff against third parties relating to
     insurance coverage covering the PPG Business with respect to events
     occurring or claims arising prior to the Closing Date, except to the extent
     included in the PPG Assets pursuant to Section 2.2(a)(vii), (ix) cash
     (other than petty cash located at the Field Locations), bank accounts, cash
     equivalents and other similar types of investments, certificates of
     deposit, U.S. Treasury bills and other marketable securities that exist on
     the Closing Date, (x) any assets of PPG or its Affiliates used in the
     performance of the Ancillary Agreements to which PPG or any such Affiliate
     is a party; (xi) any and all inventory and other assets relating to PPG
     hydrophobic products (a/k/a Aquapel Glass Treatment), (xii) all assets,
     including inventory, of (or located at) PPG's manufacturing facilities
     including Chillicothe, Ohio and any central distribution centers (xiii) all
     patents, trademarks and tradenames and other intellectual property, except
     to the extent specifically licensed to the Company pursuant to this
     Agreement or the Ancillary Agreements, (xiv) all web sites and domain
     names, (xv) any lease relating to real property used for regional manager
     or equivalent positions, and corporate headquarters locations unless such
     lease is identified on Schedule 6.6(b), (xvi) the PPG Owned Trucks (it
     being understood that the Company shall purchase the PPG Owned Trucks from
     PPG after Closing as set forth in Section 3.4 hereof); and (xvii) assets
     relating to any PPG Facilities shut down prior to the date hereof
     (collectively, the "Excluded PPG Assets" and, together with the Excluded
     Apogee Assets, the "Excluded Assets").

     Section 2.3.  Assumption of Liabilities  .  Upon the terms and subject to
                   -------------------------
the conditions of this Agreement and in reliance upon the representations,
warranties and agreements herein set

                                       19
<PAGE>

forth, the Company, effective as of the Closing, will assume and perform and in
due course pay and discharge the following Liabilities of the Contributing
Parties (which, with respect to Apogee, shall include the Apogee Contributing
Affiliates) (collectively, the "Assumed Liabilities"):

             (a)   any amounts payable under any Apogee Contract or any PPG
     Contract Party arising out of the operation of the Company after the
     Closing Date;

             (b)   all Liabilities in respect of accrued vacation for Apogee
     Employees or PPG Employees, to the extent such Liabilities are reflected on
     the Closing Date Contributed Balance Sheet of PPG or Apogee, as applicable,
     prepared in accordance with Section 3.2; and

             (c)   any Liabilities expressly assumed by the Company in
     accordance with Article IX hereof.

The Assumed Liabilities described above that relate to the Apogee Business being
contributed to the Company are referred to herein as the "Apogee Assumed
Liabilities" and the Assumed Liabilities described above that relate to the PPG
Business being contributed to the Company are referred to as the "PPG Assumed
Liabilities."  Except as expressly set forth in this Section 2.3, the Company
shall not assume, and nothing contained in this Agreement shall be construed as
an assumption by the Company of, any liabilities, obligations or undertakings of
Apogee or its Affiliates or PPG or its Affiliates of any nature whatsoever,
whether accrued, absolute, fixed or contingent, known or unknown, due or to
become due, unliquidated or otherwise, including without limitation, any Apogee
Excluded Liabilities or PPG Excluded Liabilities.

     Section 2.4.  Prorations.  On the Closing Date, or as promptly as
                   ----------
practicable following the Closing Date, but in no event later than sixty (60)
calendar days thereafter, the real and personal property Taxes, water, gas,
electricity and other utilities, common area maintenance reimbursements to
lessors, local business or other license fees or taxes, merchants' association
dues, customer rebates and other similar periodic charges payable with respect
to (i) the Apogee Assets or the Apogee Business shall be prorated between Apogee
or the Apogee Contributing Affiliate, as applicable, and the Company and (ii)
the PPG Assets or the PPG Business shall be prorated between PPG and the
Company, in each case effective as of the Closing.  To the extent practicable,
utility meter readings for the Facilities shall be determined as of the Closing.
If the final real property Tax rate or final assessed value for the current Tax
year is not established by the Closing Date, the prorations shall be made on the
basis of the rate or assessed value in effect for the preceding Tax year and
shall be adjusted as such time as the exact amounts are determined.

     Section 2.5.  Taxes.  Except as otherwise provided in this Agreement, all
                   -----
Taxes in respect of (i) the Apogee Assets and the Apogee Business for the period
or portions of periods ending prior to the Closing Date shall be borne by Apogee
or its Apogee Contributing Affiliate, as applicable ("Apogee Taxes") and (ii)
the PPG Assets and the PPG Business for the period or portions of periods ending
prior to the Closing Date shall be borne solely by PPG ("PPG Taxes") and, in
each case, not by the Company.  Except as otherwise provided in this Agreement,
all

                                       20
<PAGE>

Taxes in respect of the Apogee Assets and the PPG Assets for the period or
portions of periods beginning on or after the Closing shall be borne by the
Company or, to the extent that the Company is taxed as a pass-through entity, by
the Members pursuant to the terms of the LLC Agreement.

     Section 2.6.  Rents.
                   -----

          (a)      Apogee or the applicable Apogee Contributing Affiliate shall
     pay rent under the Apogee Leases through the end of the calendar month in
     which the Closing Date occurs, and the Company shall reimburse Apogee or
     such Apogee Contributing Affiliate for such rent accrued commencing with
     the Closing Date through the end of such month as part of the post-Closing
     proration.

          (b)      PPG shall pay rent under the PPG Leases through the end of
     the calendar month in which the Closing Date occurs, and the Company shall
     reimburse PPG for such rent accrued commencing with the Closing Date
     through the end of such month as part of the post-Closing proration.

                                  Article III
          Contribution Consideration; Payment for Contribution Excess
          -----------------------------------------------------------

     Section 3.1.  Contribution Consideration.  In consideration for the
                   --------------------------
contribution and assignment to the Company of the Contributed Assets hereunder,
in addition to the Company's assumption of the Assumed Liabilities, the Company
shall issue to Apogee (or, subject to the transfer restrictions in the LLC
Agreement, the Apogee Contributing Affiliate designated by Apogee) a Membership
Interest representing an Equity Percentage equal to thirty-four percent (34%) of
the Company and shall issue to PPG a Membership Interest representing an Equity
Percentage equal to sixty-six percent (66%) of the Company (the "Contribution
Consideration").

     Section 3.2.  Company Payment based on Contribution Excess.
                   --------------------------------------------

          (a)      Prior to June 15, 2000, each Contributing Party will prepare
     and deliver to the other Contributing Party a list identifying all
     locations for Inventory to be included in such Contributing Party's
     Contributed Assets and setting forth the estimated book value of such
     Inventory by location based on such Contributing Party's most recent month
     end Inventory balances (with respect to each Contributing Party's list, the
     "Inventory Sampling List"), and each Contributing Party will select ten
     (10) locations from the other Contributing Party's Inventory Sampling List
     (in each case, the "Sampling Locations") and notify the other Contributing
     Party of the selections no later than June 19, 2000. Commencing upon the
     close of business on the calendar month end for June, 2000 for each
     Contributing Party (the "Sampling Date"), each Contributing Party shall
     perform a physical inventory at the ten (10) Sampling Locations selected by
     the other Contributing Party in accordance with the following:

                   (1) As soon as practicable but in no event more than five (5)
          days after the Sampling Date, each Contributing Party will prepare a
          month end inventory balance dated as of the Sampling Date (the "June
          2000 Trial Balance"); it being

                                       21
<PAGE>

          understood that the June 2000 Trial Balance shall not be adjusted in
          any way in connection with the Inventory Sampling conducted pursuant
          to this Agreement.

               (2) Sampling shall be conducted according to mutually agreed-upon
          procedures established by the Contributing Parties prior to the
          applicable Sampling Date, to determine the extent (if any) by which
          the aggregate valuation (physical quantities priced consistently with
          such Contributing Party's past policies and practices) of the actual
          Inventory observed at the applicable Sampling Locations is less than
          or greater than the aggregate valuation (as reflected on such
          Contributing Party's June 2000 Trial Balance) of the Inventory
          reported by a Contributing Party on its June 2000 Trial Balance to be
          located at such Sampling Locations; any such shortfall or excess shall
          be compared to the aggregate book value of the Inventory reported to
          be located at such Sampling Locations as set forth in the applicable
          June 2000 Trial Balance, and shall be expressed in the form of a
          percentage thereof (any such shortfall or excess herein referred to as
          the "Physical Inventory Tolerance").

               (3) Sampling at each Sampling Location shall be supervised by a
          mutually agreed-upon third-party consultant (in each case to be
          selected by the other Contributing Party).

               (4) Results of all sampling shall be provided to the other
          Contributing Party or its representative as soon as practicable
          following completion of the Sampling Date, but in no event later than
          July 14, 2000; and each Contributing Party reserves the right to
          perform reasonable audits of such results in conjunction with the
          third-party consultant.

               (5) In the event the Physical Inventory Tolerance for the
          Sampling Locations of a Contributing Party exceeds one percent (1%) of
          the aggregate book value of such Contributing Party's Inventory
          reported by such Contributing Party for such Sampling Locations as set
          forth in the applicable June 2000 Trial Balance, the other
          Contributing Party (the "Requesting Contributing Party") shall have
          the right to require such Contributing Party (the "Requested
          Contributing Party") to conduct additional inventory verification
          procedures as the Requesting Contributing Party deems appropriate to
          establish a reliable valuation of the Requested Contributing Party's
          Inventory, up to requiring the Requested Contributing Party to conduct
          a full physical inventory count, as set forth below.

               (6) The Requesting Contributing Party shall give written
          notification to the Requested Contributing Party setting forth the
          additional procedures required (or requesting a full physical
          inventory count, as applicable) as soon as practicable, but in no
          event later than five (5) days following the determination of the
          Physical Inventory Tolerances.

               (7) In the event either Contributing Party is required to conduct
          a full physical inventory count, (A) the physical inventory count
          shall be conducted according to mutually agreed-upon procedures
          established by the Contributing

                                       22
<PAGE>

          Parties and shall be supervised by a mutually agreed-upon third-party
          consultant (selected by the Requesting Contributing Party), (B) the
          physical inventory count shall commence on the calendar month end for
          July, 2000 for such Contributing Party; provided, that if all
                                                  --------
          conditions to Closing set forth in Article X hereof have not been
          satisfied or waived (other than those that by their nature are to be
          satisfied at Closing) on or prior to such date, then the physical
          inventory count shall commence as soon as practicable upon the
          satisfaction or the waiver of such conditions, and (C) the Closing
          Date will be postponed until the fifth day following the completion of
          the physical inventory count.

               (8) In the event the conditions to Closing set forth in Article X
          hereof have not been satisfied or waived on or prior to September 25,
          2000, the Contributing Parties shall conduct an additional sampling of
          Inventory locations in accordance with the procedures set forth above
          (in which case, the June 2000 Trial Balance would be replaced by a
          month end inventory balance for each Contributing Party dated as of
          the calendar month end for September 2000, which date would be deemed
          the new Sampling Date) or as mutually agreed by the Contributing
          Parties, at such time as the Contributing Parties may agree, and the
          results of such sampling shall supercede any results from prior
          samplings.

          (b)  As soon as practicable (but in no event later than sixty (60)
     days following the Closing Date), each Contributing Party shall prepare and
     deliver to the other Contributing Party a Closing Date Contribution Balance
     Sheet. The Contributing Parties each agree to prepare its respective
     Closing Date Contribution Balance Sheet in a manner consistent with the
     methodology and accounting principles set forth on Exhibit B attached
     hereto, and to reflect Inventory costs as carried on the respective
     Contributing Party's Books and Records immediately prior to the Closing
     Date. The Contributing Parties each reserve the right to audit the
     calculations, methodology and accounting principles applied by the Other
     Contributing Party in preparing their respective Closing Date Contribution
     Balance Sheet during this sixty (60) day period.

          (c)  Each Contributing Party shall have the opportunity to review the
     Closing Date Contribution Balance Sheet of the other Contributing Party for
     a period of up to thirty (30) days following delivery thereof by the other
     Contributing Party.  Each Contributing Party and the Company shall provide
     the other Contributing Party and its Representatives with full access to
     any information, including to the premises of the Contributed Business, the
     Books and Records of the Contributed Business and the working papers of
     such Contributing Party's accountants, if any, supporting the Closing Date
     Contribution Balance Sheet, in each case to the extent necessary for the
     other Contributing Party to complete its review of the Closing Date
     Contribution Balance Sheet.  The Closing Date Contribution Balance Sheet of
     a Contributing Party shall be deemed accepted by the other Contributing
     Party and binding and final unless the other Contributing Party has
     provided notice to the Contributing Party within thirty (30) days following
     delivery thereof by the Contributing Party of an objection thereto (an
     "Objection").  The Objection shall state the basis on which the other
     Contributing Party objects to the Closing Date Contribution Balance Sheet
     of the Contributing Party and the

                                       23
<PAGE>

     adjustments to any individual component of the Closing Date Contribution
     Balance Sheet that the other Contributing Party claims should be made.

          (d) In the event that the Contributing Parties are unable to resolve
     all disputes with respect to either Closing Date Contribution Balance Sheet
     within thirty (30) days following receipt by a Contributing Party of an
     Objection by the other Contributing Party, the Contributing Parties shall
     refer such disputes to PricewaterhouseCoopers, which firm shall act as an
     expert (the "Expert") with respect to all disputes concerning the Closing
     Date Contribution Balance Sheet of each Contributing Party, and its
     determination of each such dispute shall be final and binding upon the
     Contributing Parties.  No later than thirty (30) days after the appointment
     of the Expert, the Contributing Parties shall submit their respective
     positions regarding any unresolved items set forth in any Objection to a
     Closing Date Contribution Balance Sheet and shall make available to the
     Expert all relevant materials and information reasonably requested by the
     Expert with respect to such Closing Date Contribution Balance Sheet and the
     preparation thereof.  The Expert shall be required to render its decision
     with respect to, but only with respect to, all disputes submitted to it and
     deliver a written report of its decision to the Contributing Parties and
     the Company within thirty (30) days of its appointment.  All costs and
     expenses of the Expert shall be borne by the Contributing Party whose
     position is furthest from the decision of the Expert with respect to such
     Closing Date Contribution Balance Sheet.

          (e) The Closing Date Contribution Balance Sheet of any Contributing
     Party shall become final and binding upon the earlier of (i) if no
     Objection has been delivered, the expiration of the thirty (30) day period
     within which a Contributing Party may make an objection pursuant to Section
     3.2(c), (ii) the agreement in writing of the Contributing Parties that the
     Closing Date Contribution Balance Sheet, together with any modifications
     thereto agreed by the Contributing Parties, is final and binding and (iii)
     the date on which the Expert shall issue its decision with respect to any
     dispute relating to the Closing Date Contribution Balance Sheet.  A
     Closing Date Contribution Balance Sheet, when final and binding, is
     referred to herein as the "Final Closing Date Contribution Balance Sheet".

          (f) Upon determination of the Final Closing Date Contribution Balance
     Sheet of each Contributing Party, if a Contributing Party has a
     Contribution Excess, the Company shall pay to the Contributing Party with
     such Contribution Excess an amount equal to the Contribution Equalization
     Payment.  Such payment shall be deemed a payment to the Contributing Party
     with the Contribution Excess for Inventory that was otherwise contributed
     by such Contributing Party as a Contributed Asset on the Closing Date;
     provided, that no Inventory acquired by the Company pursuant to this
     --------
     Section 3.2 shall count toward any purchase commitment under the PPG Supply
     Agreement and the Curvlite Supply Agreement.

          (g) The terms defined in this Section 3.2(g) shall, for purposes of
     this Section 3.2 and this Agreement, have the meanings specified below.

                                       24
<PAGE>

          "Closing Date Contribution Balance Sheet" means, with respect to a
     Contributing Party, the pro forma balance sheet, as of the Closing Date,
     for the Contributed Business of such Contributing Party, prepared in
     accordance with Section 3.2(b).

          "Closing Date Net Assets" means, with respect to a Contributing Party,
     an amount equal to the total assets minus the total liabilities indicated
     in the Closing Date Contribution Balance Sheet for such Contributing Party;
     provided, such amount shall not include any assets or liabilities relating
     --------
     to pension plans as discussed under Section 9.2(d) hereof and, provided
                                                                    --------
     further, that for the purpose of this Section 3.2 the value of each
     -------
     Contributing Party's total assets shall not be reduced by the amount of any
     Unrealized Increment or LIFO amount taken as a reserve with respect to
     Inventory contributed by such Contributing Party.

          "Closing Date Relative Asset Percentage" means, with respect to any
     Contributing Party, the ratio, expressed as a percentage, of the Closing
     Date Net Assets of such Contributing Party over the sum of the Closing Date
     Net Assets of both Contributing Parties.

          "Contribution Equalization Payment" means the amount by which the
     Closing Date Net Assets of the Contributing Party entitled to payment of
     the Contribution Equalization Payment would be required to be reduced in
     order to cause the Closing Date Relative Asset Percentage of each
     Contributing Party to equal to the Equity Percentage of each Contributing
     Party.

          "Contribution Excess" means, with respect to either Contributing
     Party, a Closing Date Relative Asset Percentage for such Contributing Party
     that is greater than the Equity Percentage for such Contributing Party.

          "Contribution Shortfall" means, with respect to either Contributing
     Party, a Closing Date Relative Asset Percentage for such Contributing Party
     that is less than the Equity Percentage for such Contributing Party.

     Section 3.3.  Contribution of Inventory.
                   -------------------------

          (a) Prior to the Closing Date, each Contributing Party, and in the
     case of Apogee, each Apogee Contributing Affiliate, shall remove from all
     Inventory any Inventory that, under PPG's inventory policy attached hereto
     as Exhibit C with respect to the PPG Business, is obsolete or overstocked
     or otherwise does not conform to such policy, shall discard or otherwise
     dispose of such Inventory, and shall not contribute such Inventory to the
     Company.  Each Contributing Party retains the right to audit the
     methodologies used by the other Contributing Party in making such
     determinations regarding the removal of such Inventory.

          (b) Notwithstanding Section 2.1, any Contributing Party may withhold
     the contribution of Inventory associated with locations or operations of
     the Contributed Business which the Contributing Parties have determined,
     prior to the Closing Date, will be closed by the Company following the
     Closing Date, or such other Inventory as the Contributing Parties shall
     mutually agree prior to the Closing Date.  If the withholding of

                                       25
<PAGE>

     such Inventory by a Contributing Party causes a Contribution Shortfall for
     such Contributing Party, such Contributing Party shall make an additional
     cash contribution to the Company equal to the book value of such Inventory
     on the Closing Date as reflected on such Contributing Party's Books and
     Records as of the Closing Date, and the Company shall purchase such
     withheld Inventory at the book value of such Inventory as reflected on such
     Contributing Party's Books and Records; provided, that no Inventory
                                             --------
     acquired by the Company pursuant to this Section 3.3 shall count toward any
     purchase commitment under the PPG Supply Agreement or the Curvlite Supply
     Agreement.

     Section 3.4.  Purchase of PPG Owned Trucks.  As soon as practicable after
                   ----------------------------
the Closing Date, the Company shall purchase from PPG all of the PPG Owned
Trucks at a purchase price equal to the aggregate net book value of the PPG
Owned Trucks as reflected in PPG's Books and Records, plus interest from the
Closing Date at a rate equal to eight the then applicable borrowing rate under
the Working Capital Loan Facility on the unpaid balance of the purchase price,
upon such terms and conditions as the Company and PPG may agree in light of the
Company's financial circumstances at such time; provided, that (i) the purchase
                                                --------
of the PPG Owned Trucks shall not count as Capital Expenditures or Basket
Capital Expenditures of the Company for the purposes of Section 13.2 of the LLC
Agreement or otherwise, (ii) the purchase price paid by the Company to PPG,
including any interest thereon, if applicable, shall not be counted in
connection with any determination of the Company's Debt to Total Capitalization
ratio for the purposes of the LLC Agreement, the PPG Credit Agreement, or
otherwise, and (iii) no assets acquired by the Company pursuant to this Section
3.4 shall count toward any purchase commitment under the PPG Supply Agreement.

                                  Article IV
                                  The Closing
                                  -----------

     Section 4.1.  The Closing.  Unless this Agreement shall have been
                   -----------
terminated and the transactions herein shall have been abandoned pursuant to
Section 12.1, the closing of the transactions contemplated by this Agreement
(the "Closing") shall take place on the first business date which shall be at
least fifteen (15) days following the satisfaction or waiver of all conditions
to closing set forth in Article X, subject to Section 3.2 hereof, or such other
date as the parties shall mutually agree, other than those that by their nature
are to be satisfied at the Closing (the "Closing Date"), at the offices of
Dorsey & Whitney located in Minneapolis, Minnesota, and shall be effective as of
12:01 a.m. Central Daylight time on such date, unless another date, time or
place is agreed to in writing by the parties hereto.

     Section 4.2.  Deliveries upon Execution of this Agreement; Effective Upon
                   -----------------------------------------------------------
Closing.  On the date hereof, each of the Contributing Parties, or their
-------
Affiliates, and the Company, as applicable, shall have delivered,
contemporaneously with the execution and delivery of this Agreement, the
following:

          (a)      a duly executed LLC Agreement attached hereto as Exhibit D;

                                       26
<PAGE>

          (b)      a duly executed Supply Agreement to be attached hereto as
     Exhibit E pursuant to which an Affiliate of Apogee agrees to supply certain
     autoglass products to the Company (the "Curvlite Supply Agreement");

          (c)      a duly executed Supply Agreement to be attached hereto as
     Exhibit F pursuant to which an Affiliate of Apogee agrees to purchase
     certain autoglass products from the Company (the "Harmon Glass Supply
     Agreement");

          (d)      a duly executed Supply Agreement to be attached hereto as
     Exhibit G pursuant to which an PPG agrees to supply certain autoglass
     products to the Company (the "PPG Supply Agreement"); and

          (e)      a duly executed Working Capital Loan Facility to be attached
     hereto as Exhibit H pursuant to which PPG agrees to loan the Company funds
     for the purpose of financing the working capital needs of the Company (the
     "PPG Credit Agreement").

The LLC Agreement, the Curvlite Supply Agreement, the Harmon Glass Supply
Agreement, the PPG Supply Agreement and the PPG Credit Agreement shall come into
full force and effect only upon satisfaction of all conditions to Closing set
forth in this Agreement and completion of the Closing.

     Section 4.3.  Closing Deliveries of both Contributing Parties.  On the
                   -----------------------------------------------
Closing Date, each of the Contributing Parties or their Affiliates, as
applicable, shall deliver to the Company the following:

          (a)      a duly executed bill of sale in a form to be mutually agreed
     by the Contributing Parties;

          (b)      duly executed assignment and assumption agreements with
     respect to the Contracts, in a form to be mutually agreed by the
     Contributing Parties;

          (c)      duly executed assignment agreements with respect to the
     Leased Real Property, in a form to be mutually agreed by the Contributing
     Parties;

          (d)      duly executed Owned Real Property Leases with respect to the
     Owned Real Property in a form to be mutually agreed by the Contributing
     Parties;

          (e)      such other documents as the other Contributing Party may
     reasonably request in order to effect the intents and purposes of this
     Agreement and the Ancillary Agreements, including, without limitation, the
     assignment and assumption of vehicle leases included in the Contributed
     Assets; and

          (f)      a duly executed or acknowledged, as applicable, consent in a
     form to be mutually agreed by the Contributing Parties and attached hereto
     as Exhibit I upon Closing pursuant to which PPG consents to the grant of a
     security interest in Apogee's

                                       27
<PAGE>

     Membership Interests in the Company under the BONY Security Agreement (the
     "PPG Consent to Security Interest").

     Section 4.4.  Closing Deliveries of Apogee.  In addition to the agreements
                   ----------------------------
and instruments required to be delivered pursuant to Section 4.2, on the Closing
Date, Apogee or its Affiliates, as applicable, shall deliver to the Company or
to PPG, as applicable, the following:

          (a)      a duly executed Transition Agreement in a form to be mutually
     agreed by the Contributing Parties and attached hereto as Exhibit J upon
     Closing pursuant to which the Company agrees to cover certain operating
     costs and the Company and PPG, as applicable, agrees to purchase certain
     inventory of Apogee or its Affiliates at the NDC (the "NDC Transition
     Agreement");

          (b)      a duly executed Services Agreement in a form to be mutually
     agreed by the Contributing Parties and attached hereto as Exhibit K upon
     Closing pursuant to which Apogee agrees to provide certain services to the
     Company on a transitional basis (the "Apogee Transition Services
     Agreement"); and

          (c)      a duly executed Leased Employees Agreement in a form to be
     mutually agreed by the Contributing Parties and attached hereto as Exhibit
     L upon Closing pursuant to which Apogee agrees to loan the services of
     certain employees of Apogee or its Affiliates to the Company (the "Apogee
     Leased Employees Agreement").

     Section 4.5.  Closing Deliveries of PPG.  In addition to the agreements
                   -------------------------
and instruments required to be delivered pursuant to Section 4.2, on the Closing
Date, PPG or its Affiliates, as applicable, shall deliver to the Company or to
Apogee, as applicable, the following:

          (a)      a duly executed Services Agreement in a form to be mutually
     agreed by the Contributing Parties and attached hereto as Exhibit M upon
     Closing pursuant to which PPG agrees to provide certain services to the
     Company on a long-term basis (the "PPG Services Agreement");

          (b)      a duly executed Leased Employees Agreement in a form to be
     mutually agreed by the Contributing Parties and attached hereto as Exhibit
     N upon Closing pursuant to which PPG agrees to loan the services of certain
     employees of PPG or its Affiliates to the Company (the "PPG Leased
     Employees Agreement"); and

          (c)      a duly executed NDC Transition Agreement.

     Section 4.6.  Closing Deliveries of the Company.  On the Closing Date, the
                   ---------------------------------
Contributing Parties shall cause the Company to deliver to the Contributing
Parties, as applicable, the following:

          (a)      the Contribution Consideration;

                                       28
<PAGE>

          (b)      duly executed assignment and assumption agreements with
     respect to the Contracts;

          (c)      duly executed assignment agreements with respect to the
     Leased Real Property;

          (d)      a duly executed NDC Transition Agreement;

          (e)      a duly executed Apogee Transition Services Agreement;

          (f)      a duly executed Apogee Leased Employees Agreement;

          (g)      a duly executed PPG Services Agreement;

          (h)      a duly executed PPG Leased Employees Agreement; and

          (i)      such other documents as the Contributing Parties may
     reasonably request in order to effect the intents and purposes of this
     Agreement and the Ancillary Agreements.

                                   Article V
                   Representations and Warranties of Apogee
                   ----------------------------------------

     As an inducement to the Company to enter into this Agreement and to
consummate the transactions contemplated herein, Apogee represents and warrants
to PPG and to the Company as follows:

     Section 5.1.  Corporate Existence and Power.  Each of Apogee and each
                   -----------------------------
Apogee Contributing Affiliate is a corporation duly incorporated, validly
existing and in good standing under the laws of its respective jurisdiction of
incorporation, and has all requisite corporate power and authority and all
authorizations, licenses, permits and certifications necessary to carry on the
Apogee Business as now conducted and to own, lease and operate the Apogee Assets
as now owned, leased and operated.

     Section 5.2.  Authority; Execution, Delivery; Valid and Binding Agreement.
                   -----------------------------------------------------------
Apogee and each Apogee Contributing Affiliate has the requisite corporate power
and authority to execute and deliver this Agreement and each of the Ancillary
Documents to which it is a party and to perform its obligations hereunder and
thereunder. The execution, delivery and performance by Apogee and each Apogee
Contributing Affiliate of this Agreement and the Ancillary Documents to which it
is a party and the consummation by Apogee and each Apogee Contributing Affiliate
of the transactions contemplated hereby and thereby have been duly and validly
authorized by the Board of Directors of Apogee and each Apogee Contributing
Affiliate, and no other corporate proceedings on the part of Apogee or any
Apogee Contributing Affiliate are, and no shareholder approval is, or will be
necessary to authorize this Agreement and the Ancillary Documents and the
transactions contemplated hereby. This Agreement and the Ancillary Documents
have been duly and validly executed by Apogee and each Apogee

                                       29
<PAGE>

Contributing Affiliate, in each case to the extent it is a party hereto or to
such Ancillary Document, and, in each such case, constitute the legal, valid and
binding agreements of Apogee and each Apogee Contributing Affiliate, enforceable
against Apogee and such each Apogee Contributing Affiliate in accordance with
their terms, except as may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting creditors' rights generally
and subject to general principles of equity.

     Section 5.3.  No Breach.  The execution, delivery and performance by Apogee
                   ---------
and each Apogee Contributing Affiliate of this Agreement and the Ancillary
Documents to which it is a party does not and will not (a) contravene or
conflict with the Articles of Incorporation or Bylaws of Apogee or the Apogee
Contributing Affiliate, or any amendment thereto; (b) assuming all filings
required under the HSR Act will be made, contravene or conflict with or
constitute a violation of any provision of any Applicable Law binding upon or
applicable to Apogee, any Apogee Contributing Affiliate, the Apogee Business or
any of the Apogee Assets; (c) except as provided for those Apogee Contracts set
forth on Schedule 5.7(d), conflict with, result in a breach of or constitute a
default under or give rise to any right of termination, cancellation or
acceleration of, or require any consent, authorization or approval under any
Apogee Contract or any Apogee Permit or similar authorization relating to the
Apogee Business or included in any of the Apogee Assets or by which the Apogee
Business or any of the Apogee Assets may be bound; (d) result in the creation or
imposition of any Lien on any Apogee Asset, other than Permitted Liens; or (e)
conflict with, result in a breach of, constitute a default under, or accelerate
or permit the acceleration of the performance required by, or require any
consent, authorization or approval under (i) any mortgage, indenture, loan or
credit agreement or any other agreement or instrument evidencing indebtedness
for money borrowed to which Apogee or any Apogee Contributing Affiliate is a
party or by which Apogee, any Apogee Contributing Affiliate or the Apogee
Contributed Assets are bound.

     Section 5.4.  Governmental Authorization.  The execution, delivery and
                   --------------------------
performance by Apogee of this Agreement and the Ancillary Documents require no
action by, consent or approval of, or filing with, any Governmental Authority,
except for the consents and approvals described in Schedule 5.4 and filings
under the HSR Act, other than any actions, consents, approvals or filings which,
if not taken or made, are not reasonably likely to have a Material Adverse
Effect on Apogee or the Company.

     Section 5.5.  Inventory.  All Inventory of Apogee was acquired and has been
                   ---------
maintained in accordance with the regular business practices of Apogee, consists
of items of a quality and quantity usable or saleable in the ordinary course of
business and is valued at prices equal to the lower of cost or net realizable
value and in accordance with GAAP. The Inventory will, as of the Closing Date,
consist only of items of quality and a quantity commercially usable and salable
at not less than cost in the ordinary course of business, and will reflect the
removal of any and all Inventory required to be removed from the Contributed
Assets pursuant to the terms of Section 3.3.

     Section 5.6.  Properties; Leases.
                   ------------------

          (a)      Apogee owns and will transfer to the Company good, valid and

                                       30
<PAGE>

     marketable title to, or in the case of the "Apogee Leased Real Property", a
     good, valid and marketable leasehold interest in, all of the Apogee Assets
     (including all real, personal or mixed, tangible or intangible assets) free
     and clear of all Liens (other than Permitted Liens).

          (b)      Schedule 5.6(b) lists all Apogee Leased Real Property used in
     the operation of the Apogee Business and included in the Apogee Assets and
     all Apogee Owned Real Property subject to the Apogee Owned Real Property
     Leases and all Apogee Facilities. Each of the Apogee Leases covering Apogee
     Leased Property is in full force and effect in all material respects and,
     to Apogee's knowledge, constitutes the legal, valid and binding obligations
     of the parties thereto, enforceable in accordance with its terms, except to
     the extent that enforcement may be limited by bankruptcy, insolvency,
     moratorium or other similar laws presently or hereinafter in effect
     relating to or affecting the enforcement of creditors' rights generally.

          (c)      Schedule 5.6(c) sets forth a list of all the Apogee Assets
     used in the operation of the Apogee Business that constitute Apogee
     Fixtures and Equipment.

          (d)      Schedule 5.6(d) sets forth a list of all (i) Apogee Leases
     for the Apogee Leased Real Property and (ii) leases and licenses of
     personal property used in the operation of the Apogee Business other than
     leases or licenses involving aggregate payments of $250,000 or less or that
     are terminable without penalty or other financial liability in one year or
     less. Apogee has delivered to the Company true and complete copies of all
     Apogee Leases. With respect to the Apogee Leases, there exists no default
     by Apogee, or, to the knowledge of Apogee, any default or threatened
     default by any lessor or third party thereunder, that has affected or could
     reasonably be expected to affect the rights and privileges thereunder of
     Apogee. Assuming the Required Apogee Contractual Consents are obtained, all
     Apogee Leases may be assigned, transferred and conveyed to the Company
     without default, penalty or modification thereof.

     Section 5.7.  Contracts; Required Consents.
                   ----------------------------

          (a)      Schedule 5.7(a) lists all Apogee Contracts (other than
     purchase orders), whether written or oral, included in the Apogee Assets
     that satisfy one or more of the following criteria: (i) contracts not made
     in the ordinary course of business; (ii) distribution, franchise, license,
     technical assistance, sales or advertising contracts related exclusively to
     the Apogee Assets or the Apogee Business (and which are not cancelable on
     thirty (30) days notice); (iii) options with respect to any property, real
     or personal, whether Apogee shall be the grantor or grantee thereunder;
     (iv) contracts involving future expenditures or Liabilities, actual or
     potential, in excess of $250,000 or that are not terminable without penalty
     or other financial liability in one (1) year or less; (v) contracts
     containing covenants limiting the freedom of Apogee or any Apogee
     Contributing Affiliate or any officer, director, shareholder or Affiliate
     of Apogee or any Apogee Contributing Affiliate, to engage in any line of
     business or compete with any Person; (vi) operating or other agreements
     with respect to partnerships, limited liability companies and joint
     ventures; (vii) employment contracts and severance agreements with

                                       31
<PAGE>

     persons employed in connection with the operation of the Apogee Business;
     (viii) labor or union contracts; and (ix) Apogee Contracts or commitments
     relating to commission arrangements with others.

          (b)      Except for oral agreements entered into with customers,
     distributors and suppliers in the ordinary course of business and except
     for any Employee Plans, the Apogee Contracts listed on Schedule 5.7(a),
     together with the Apogee Leases and the other Apogee Contracts not required
     to be disclosed on Schedule 5.7(a), constitute all contracts and agreements
     binding upon Apogee or any of its Affiliates relating to the Apogee
     Business.

          (c)      Each of Apogee and the Apogee Contributing Affiliates has
     complied in all material respects with all written Apogee Contracts and is
     not in material default under any of the written Apogee Contracts, nor has
     Apogee or any Apogee Contributing Affiliate granted or been granted any
     material waiver or forbearance with respect to any of the written Apogee
     Contracts except where such default would not have a Material Adverse
     Effect on Apogee. To the Knowledge of Apogee, no other contracting party is
     in material default under any of the written Apogee Contracts except where
     such default would not have a Material Adverse Effect on Apogee.

          (d)      Schedule 5.7(d) lists each Apogee Contract described in
     Schedule 5.7(a) and each Apogee Lease described in Schedule 5.6(d) with
     respect to which the consent of the other party or parties thereto must be
     obtained by Apogee or an Apogee Contributing Affiliate pursuant to an
     express term or provision thereof by virtue of the execution and delivery
     of this Agreement or the consummation of the transactions contemplated
     hereby to avoid the invalidity of the transfer of such Apogee Contract, the
     termination thereof, a breach or default thereunder or any other change or
     modification to the terms thereof (each, a "Required Apogee Contractual
     Consent").

     Section 5.8.  Permits.  Apogee or the applicable Apogee Contributing
                   -------
Affiliate has obtained all approvals, authorizations, registrations, exemptions,
certificates, consents, licenses, orders and permits or other similar
authorizations of all Governmental Authorities (and all other Persons) or
required under Applicable Law necessary for the operation of the Apogee Assets
or the Apogee Business (the "Apogee Permits"), and each such Apogee Permit is
valid and in full force and effect. Neither Apogee or the applicable Apogee
Contributing Affiliate is in default, nor has Apogee or the applicable Apogee
Contributing Affiliate received any notice of any claim of default, with respect
to any such Apogee Permit except where such default would not have a Material
Adverse Effect on Apogee.

     Section 5.9.  Compliance with Laws.  The Apogee Business is in compliance
                   --------------------
with all Applicable Laws currently in effect except for any violations which
individually or in the aggregate would not result in a Material Adverse Effect
on the Apogee Business.  Neither Apogee nor any Apogee Contributing Affiliate
has received notice from any Governmental Authority alleging that the Apogee
Business or the Apogee Assets are not in compliance with any Applicable Law, or
of any investigation or administrative proceeding to determine such compliance.

                                       32
<PAGE>

     Section 5.10.  Financial Information.  Apogee has delivered to PPG copies
                    ---------------------
of (i) an unaudited interim balance sheet of the Apogee Business at October 30,
1999 and the related statement of income for the twelve (12) month period then
ended.  True and correct copies of such financial statements are attached hereto
as Schedule 5.10(a).  The foregoing financial statements have been prepared from
the Books and Records of Apogee in accordance with Apogee's policies and
accounting principles and individual line items were prepared in accordance with
GAAP consistently applied throughout the periods involved except as may be noted
therein, subject to year-end adjustments and such information as would be
included in the notes to year-end financial statements.  Such unaudited interim
financial statements are true and correct and fairly present, in all material
respects, the financial position of the Apogee Business at the dates indicated
and the results of operations of the Apogee Business for the period then ended,
subject to year-end adjustments and such information as would be included in the
notes to year-end financial statements.  The adjustments to the financial
statements attached as Schedule 5.10(a) made by Apogee and reflected on Schedule
5.10(b) were made in good faith based on Apogee's knowledge and understanding of
the adjustments and other calculation methodologies mutually agreed to by PPG
and Apogee.

                                  Article VI
                     Representations and Warranties of PPG
                     -------------------------------------

     As an inducement to the Company to enter into this Agreement and to
consummate the transactions contemplated herein, PPG represents and warrants to
Apogee and to the Company as follows:

     Section 6.1.  Corporate Existence and Power.  PPG is a corporation duly
                   -----------------------------
incorporated, validly existing and in good standing under the laws of its
jurisdiction of incorporation, and has all requisite corporate power and
authority and all authorizations, licenses, permits and certifications necessary
to carry on the PPG Business as now conducted and to own, lease and operate the
PPG Assets as now owned, leased and operated.

     Section 6.2.  Authority; Execution, Delivery; Valid and Binding Agreement.
                   -----------------------------------------------------------
PPG has the requisite corporate power and authority to execute and deliver
this Agreement and each of the Ancillary Documents to which it is a party and to
perform its obligations hereunder and thereunder.  The execution, delivery and
performance by PPG of this Agreement and the Ancillary Documents to which it is
a party and the consummation by PPG of the transactions contemplated hereby and
thereby have been duly and validly authorized by the Board of Directors of PPG,
and no other corporate proceedings on the part of PPG are, and no shareholder
approval is, or will be necessary to authorize this Agreement and the Ancillary
Documents and the transactions contemplated hereby.  This Agreement and the
Ancillary Documents have been duly and validly executed by PPG, in each case to
the extent it is a party hereto or to such Ancillary Document, and, in each such
case, constitute the legal, valid and binding agreements of PPG, enforceable
against PPG in accordance with their terms, except as may be limited by
applicable bankruptcy, insolvency, reorganization, moratorium or similar laws
affecting creditors' rights generally and subject to general principles of
equity.

                                       33
<PAGE>

     Section 6.3.  No Breach.  The execution, delivery and performance by PPG of
                   ---------
this Agreement and the Ancillary Documents to which it is a party does not and
will not (a) contravene or conflict with the Articles of Incorporation or Bylaws
of PPG, or any amendment thereto; (b) assuming all filings required under the
HSR Act will be made, contravene or conflict with or constitute a violation of
any provision of any Applicable Law binding upon or applicable to PPG, the PPG
Business or any of the PPG Assets; (c) except as provided for those PPG
Contracts set forth on Schedule 6.7(d), conflict with, result in a breach of or
constitute a default under or give rise to any right of termination,
cancellation or acceleration of, or require any consent, authorization or
approval under any PPG Contract or any PPG Permit or similar authorization
relating to the PPG Business or included in any of the PPG Assets or by which
the PPG Business or any of the PPG Assets may be bound; (d) result in the
creation or imposition of any Lien on any PPG Asset, other than Permitted Liens;
or (e) conflict with, result in a breach of, constitute a default under, or
accelerate or permit the acceleration of the performance required by, or require
any consent, authorization or approval under (i) any mortgage, indenture, loan
or credit agreement or any other agreement or instrument evidencing indebtedness
for money borrowed to which PPG is a party or by which PPG or the PPG
Contributed Assets are bound.

     Section 6.4.  Governmental Authorization.  The execution, delivery and
                   --------------------------
performance by PPG of this Agreement and the Ancillary Documents require no
action by, consent or approval of, or filing with, any Governmental Authority,
except for the consents and approvals described in Schedule 6.4 and filings
under the HSR Act, other than any actions, consents, approvals or filings which,
if not taken or made, are not reasonably likely to have a Material Adverse
Effect on PPG or the Company.

     Section 6.5.  Inventory.  All Inventory of PPG was acquired and has been
                   ---------
maintained in accordance with the regular business practices of PPG, consists of
items of a quality and quantity usable or saleable in the ordinary course of
business and is valued for book purposes using the last-in, first-out (LIFO)
cost method and net of any Unrealized Increment reserve which does not exceed
net realizable value and in accordance with GAAP. The Inventory will, as of the
Closing Date, consist only of items of quality and a quantity commercially
usable and salable at not less than cost in the ordinary course of business, and
will reflect the removal of any and all Inventory required to be removed from
the Contributed Assets pursuant to the terms of Section 3.3.

     Section 6.6.  Properties; Leases.
                   ------------------

          (a) PPG owns and will transfer to the Company good, valid and
     marketable title to, or in the case of the "PPG Leased Real Property", a
     good, valid and marketable leasehold interest in, all of the PPG Assets
     (including all real, personal or mixed, tangible or intangible assets) free
     and clear of all Liens (other than Permitted Liens).

          (b) Schedule 6.6(b) lists all PPG Leased Real Property used in the
     operation of the PPG Business and included in the PPG Assets and all PPG
     Owned Real Property subject to the PPG Owned Real Property Leases and all
     PPG Facilities.  Each of the PPG Leases covering PPG Leased Property is in
     full force and effect in all material respects

                                       34
<PAGE>

     and, to PPG's knowledge, constitutes the legal, valid and binding
     obligations of the parties thereto, enforceable in accordance with its
     terms, except to the extent that enforcement may be limited by bankruptcy,
     insolvency, moratorium or other similar laws presently or hereinafter in
     effect relating to or affecting the enforcement of creditors' rights
     generally.

          (c) Schedule 6.6(c) sets forth a list of all the PPG Assets used in
     the operation of the PPG Business that constitute PPG Fixtures and
     Equipment.

          (d) Schedule 6.6(d) sets forth a list of all (i) PPG Leases for the
     PPG Leased Real Property and (ii) leases and licenses of personal property
     used in the operation of the PPG Business other than leases or licenses
     involving aggregate payments of $250,000 or less or that are terminable
     without penalty or other financial liability in one year or less.  PPG has
     delivered to the Company true and complete copies of all PPG Leases.  With
     respect to the PPG Leases, there exists no default by PPG, or, to the
     knowledge of PPG, any default or threatened default by any lessor or third
     party thereunder, that has affected or could reasonably be expected to
     affect the rights and privileges thereunder of PPG.  Assuming the Required
     PPG Contractual Consents are obtained, all PPG Leases may be assigned,
     transferred and conveyed to the Company without default, penalty or
     modification thereof.

     Section 6.7.  Contracts; Required Consents.
                   ----------------------------

          (a) Schedule 6.7(a) lists all PPG Contracts (other than purchase
     orders), whether written or oral, included in the PPG Assets that satisfy
     one or more of the following criteria: (i) contracts not made in the
     ordinary course of business; (ii) distribution, franchise, license,
     technical assistance, sales or advertising contracts related exclusively to
     the PPG Assets or the PPG Business (and which are not cancelable on thirty
     (30) days notice); (iii) options with respect to any property, real or
     personal, whether PPG shall be the grantor or grantee thereunder; (iv)
     contracts involving future expenditures or Liabilities, actual or
     potential, in excess of $250,000 or that are not terminable without penalty
     or other financial liability in one (1) year or less; (v) contracts
     containing covenants limiting the freedom of PPG or any officer, director,
     shareholder or Affiliate of PPG, to engage in any line of business or
     compete with any Person; (vi) operating or other agreements with respect to
     partnerships, limited liability companies and joint ventures; (vii)
     employment contracts and severance agreements with persons employed in
     connection with the operation of the PPG Business; (viii) labor or union
     contracts; and (ix) PPG Contracts or commitments relating to commission
     arrangements with others.

          (b) Except for oral agreements entered into with customers,
     distributors and suppliers in the ordinary course of business and except
     for any Employee Plans, the PPG Contracts listed on Schedule 6.7(a),
     together with the PPG Leases and the other PPG Contracts not required to be
     disclosed on Schedule 6.7(a), constitute all contracts and agreements
     binding upon PPG or any of its Affiliates relating to the PPG Business.

                                       35
<PAGE>

          (c) PPG has complied in all material respects with all written PPG
     Contracts and is not in material default under any of the written PPG
     Contracts, nor has PPG granted or been granted any material waiver or
     forbearance with respect to any of the written PPG Contracts except where
     such default would not have a Material Adverse Effect on PPG.  To the
     Knowledge of PPG, no other contracting party is in material default under
     any of the written PPG Contracts except where such default would not have a
     Material Adverse Effect on PPG.

          (d) Schedule 6.7(d) lists each PPG Contract described in Schedule
     6.7(a) and each PPG Lease described in Schedule 6.6(d) with respect to
     which the consent of the other party or parties thereto must be obtained by
     PPG pursuant to an express term or provision thereof by virtue of the
     execution and delivery of this Agreement or the consummation of the
     transactions contemplated hereby to avoid the invalidity of the transfer of
     such PPG Contract, the termination thereof, a breach or default thereunder
     or any other change or modification to the terms thereof (each, a "Required
     PPG Contractual Consent").

     Section 6.8.  Permits.  PPG has obtained all approvals, authorizations,
                   -------
registrations, exemptions, certificates, consents, licenses, orders and permits
or other similar authorizations of all Governmental Authorities (and all other
Persons) or required under Applicable Law necessary for the operation of the PPG
Assets or the PPG Business (the "PPG Permits"), and each such PPG Permit is
valid and in full force and effect. PPG is not in default, nor has PPG received
any notice of any claim of default, with respect to any such PPG Permit except
where such default would not have a Material Adverse Effect on PPG.

     Section 6.9.  Compliance with Laws.  The PPG Business is in compliance with
                   --------------------
all Applicable Laws currently in effect except for any violations which
individually or in the aggregate would not result in a Material Adverse Effect
on the PPG Business. PPG has not received notice from any Governmental Authority
alleging that the PPG Business or the PPG Assets are not in compliance with any
Applicable Law, or of any investigation or administrative proceeding to
determine such compliance.

     Section 6.10. Financial Information.  PPG has delivered to Apogee copies of
                   ---------------------
(i) an unaudited interim balance sheet of the PPG Business at October 30, 1999
and the related statement of income for the twelve (12) month period then ended.
True and correct copies of such financial statements are attached hereto as
Schedule 6.10(a). The foregoing financial statements have been prepared from the
Books and Records of PPG in accordance with PPG's policies and accounting
principles and individual line items were prepared in accordance with GAAP
consistently applied throughout the periods involved except as may be noted
therein, subject to year-end adjustments and such information as would be
included in the notes to year-end financial statements. Such unaudited interim
financial statements are true and correct and fairly present, in all material
respects, the financial position of the PPG Business at the dates indicated and
the results of operations of the PPG Business for the period then ended, subject
to year-end adjustments and such information as would be included in the notes
to year-end financial statements. The adjustments to the financial statements
attached as Schedule 6.10(a) made by PPG and reflected on Schedule 6.10(b) were
made in good faith based on PPG's

                                       36
<PAGE>

knowledge and understanding of the adjustments and other calculation
methodologies mutually agreed to by PPG and Apogee.

              Article VII  Covenants of the Contributing Parties

     Each Contributing Party hereby covenants and agrees with the other
Contributing Party as follows:

     Section 7.1.  Required Consents.  The parties shall use their
                   -----------------
commercially reasonable efforts to obtain the Required Consents prior to the
Closing Date.  To the extent that any Required Consents have not been obtained
prior to the Closing Date, the applicable Contributing Party shall use its
commercially reasonable efforts to obtain or cause its Affiliate, as applicable,
to obtain such Required Consents as soon as practicable, at its sole cost and
expense.  In the event any Required Consent is not obtained, the applicable
Contributing Party shall use its commercially reasonable efforts to structure
the transaction with respect to the Contract in question in a manner that will
not result in a default under such Contract but that will result in the Company
obtaining the benefits and incurring the obligations that it would have
otherwise obtained or incurred had the applicable Required Consent been obtained
(a "Contract Restructuring").  Neither Contributing Party shall be required to
make any payment requested by the other party to the applicable Contract to
obtain a Required Consent.  In the event any such request for payment is made by
a Person with respect to which a Required Consent is being solicited and both
Contributing Parties agree to make such payment, such payment shall be
reimbursed by the Company.  In connection with a Contract Restructuring, the
Company shall reimburse such Contributing Party for the reasonable costs or
expenses incurred by that Contributing Party after the Closing Date with respect
to conferring the benefits of the applicable Contract on the Company; provided,
                                                                      --------
that, without the consent of both Contributing Parties, in no event shall the
Company reimburse any Contributing Party in excess of the costs the Company
would have incurred if such Contract had been assigned to the Company with a
Required Consent on the Closing Date.  On and after the Closing Date, each
Contributing Party shall comply at its own expense with all conditions and
requirements set forth in (i) all approvals and consents of Governmental
Authorities described in Schedule 5.4 that have been obtained as necessary to
keep the same in full force and effect assuming continued compliance with the
terms thereof by the Company and (ii) all Required Consents that have been
obtained as necessary to keep the same effective and enforceable against the
Persons giving such Required Contractual Consents assuming continued compliance
with the terms thereof by the Company.  Notwithstanding anything to the contrary
in this Agreement, if a Contributing Party is unable to obtain a Required
Consent after having complied with its obligations under this Section 7.1, [(i)]
such Contributing Party shall have no liability to the other Contributing Party
or to the Company as a result of its failure to obtain such Required Consent,
(ii) the Company shall indemnify in full the Contributing Party (and in the case
of Apogee, each Apogee Contributing Affiliate) which is a party to any Contract
(including, for the avoidance of doubt, any Apogee Real Property Lease or PPG
Real Property Lease) for which a Required Consent has not been obtained and hold
it harmless against any Losses which such Contributing Party (or Apogee
Contributing Affiliate) may suffer, sustain or become subject to, as a result
of, arising in connection with or incident to such Contract, including Losses in
respect of a Contract Restructuring, the early termination of such Contract or
the failure to perform under such Contract, but expressly excluding any Loss

                                       37
<PAGE>

relating to any Excluded Liability (for example, any Environmental Claim or
Environmental Loss with respect to Apogee Leased Real Property or PPG Leased
Real Property subject to an Apogee Real Property Lease or PPG Real Property
Lease relating to the period prior to the Closing Date).

     Section 7.2.  Access.  Subject to reasonable guidelines intended to
                   ------
maintain the respective pre-Closing independence and separate existence of the
Apogee Business and the PPG Business, each Contributing Party shall give to the
other Contributing Party's Representatives free and full access to and the right
to inspect, during normal business hours, all of the premises, properties,
Contributed Assets, records, Contracts, licenses and other documents relating to
the operation of the Apogee Business or the PPG Business and shall permit them
to consult with the Representatives of the Contributing Parties for the purpose
of making such investigation of the Apogee Business or the PPG Business as the
other Contributing Party shall desire to make, provided, that such investigation
                                               --------
shall be conducted in a manner that the Contributing Parties determine will
maintain confidentiality and shall not unreasonably interfere with the operation
of the Apogee Business or the PPG Business and neither Contributing Party shall
contact any customers or suppliers of the other Contributing Party without the
consent of such other Contributing Party except as otherwise authorized under
this Agreement.

     Section 7.3.  Further Assurances.  At any time or from time to time after
                   ------------------
the Closing Date, each Contributing Party shall, at the request of the Company
or the other Contributing Party, execute and deliver any further instruments or
documents and take all such further action as the Company or the other
Contributing Party may reasonably request in order to evidence or otherwise
facilitate the consummation of the transactions contemplated hereby.

     Section 7.4.  Environmental Information.  Each of the Contributing Parties
                   -------------------------
hereby acknowledges that it has provided certain environmental documents,
information and data to the other Contributing Party relating to the
Environmental Condition of certain of the Apogee Real Property and the PPG Real
Property (collectively, "Environmental Information"). The Contributing Parties
agree that if an Environmental Claim arises after the Closing Date relating to
the Apogee Real Property or the PPG Real Property, the Environmental
Information, if any, relating to such Apogee Real Property or PPG Real Property,
shall (together with any all other additional documents, information, data,
reports and other materials, including documents, information, data, reports and
materials relating to the Apogee Real Property or the PPG Real Property after
the date hereof) be taken into account in addressing any Liability (or
indemnification obligation under this Agreement) with respect to such
Environmental Claim.

     Section 7.5.  Release of Security Interests.  Each Contributing Party will
                   -----------------------------
contribute good, marketable and indefeasible title to all of the Contributed
Assets being contributed by such Contributing Party, including all assets
reflected on the Final Closing Date Balance Sheet, free and clear of all Liens,
other than Permitted Liens; and not subject to any security interest (including,
without limitation, any security interest granted under the BONY Security
Agreement).

                                       38
<PAGE>

                      Article VIII  Additional Agreements

     The Company, Apogee and PPG hereby covenant and agree as follows:

     Section 8.1.  Diligence in Pursuit of Conditions Precedent.  The Company,
                   --------------------------------------------
Apogee and PPG shall each exercise all commercially reasonable efforts to
fulfill their respective obligations hereunder and to cause the conditions to
Closing set forth in this Agreement to be satisfied and to consummate the
transactions contemplated hereby, insofar as such matters are within the control
of the Company, Apogee or PPG, as applicable.

     Section 8.2.  Taxes.
                   -----

          (a) All sales, value added, use, transfer, registration, stamp and
     similar Taxes imposed in connection with the transfer of the Contributed
     Assets will be borne by the applicable Contributing Party.

          (b) The Contributing Parties shall (i) provide the Company with such
     assistance as may reasonably be requested in connection with the
     preparation of any Tax Return and the conduct of any audit or other
     examination by any taxing authority or in connection with judicial or
     administrative proceedings relating to any liability for Taxes and (ii)
     retain and provide the Company with all records or other information that
     may be relevant to the preparation of any Tax Returns, or the conduct of
     any audit or examination, or other Tax Proceeding.  The Contributing
     Parties shall retain all relevant documents, including prior year's Tax
     Returns, supporting work schedules and other records or information that
     may be relevant to such returns and shall not destroy or otherwise dispose
     of any such records without first offering such materials to the Company.

          (c) The Contributing Parties will provide to the Company all Tax
     information, including, but not limited to, the tax basis of the
     Contributed Assets at the Closing Date, as reasonably requested by the
     Company.

     Section 8.3.  Regulatory Consents.  As promptly as practicable after the
                   -------------------
execution of this Agreement, the Company and the Contributing Parties shall, to
the extent they have not previously done so, make all filings required under the
HSR Act and any Applicable Laws for the consummation of the transactions
contemplated herein.  In addition, the Contributing Parties will each furnish
all information as may be required by any state regulatory agency properly
asserting jurisdiction or by the Federal Trade Commission and the United States
Department of Justice under the HSR Act in order that the requisite approvals
for the transactions contemplated hereby be obtained or to cause any applicable
waiting periods to expire.

     Section 8.4.  Accounts Receivable Collection.
                   ------------------------------

          (a) In accordance with Section 2.2, all accounts receivable relating
     to or arising in connection with the Contributed Business of each
     Contributing Party prior to the Closing (other than such receivables set
     forth in Section 2.1(a)(xi) hereof) are Excluded Assets and will be
     retained by the Contributing Parties (such accounts receivable, as of the
     Closing Date, the "Closing Date Receivables").  The Company shall

                                       39
<PAGE>

     collect any Closing Date Receivables for the account of each Contributing
     Party from and after the Closing Date until the end of the Collection
     Period (as defined below). In connection therewith, on the Closing Date
     each Contributing Party shall provide the Company with a list setting forth
     its Closing Date Receivables to be collected by the Company and shall grant
     the Company reasonable access to such Contributing Party's detail accounts
     receivable system or daily data files with respect to the Closing Date
     Receivables. Such data files shall include (but may not be limited to) for
     each Closing Date Receivable: the customer owing such receivable, the party
     to which the receivable is owed, the credit terms, the outstanding balance
     of such receivable, the date, amount and number of invoice, unapplied
     payments, customer payment deduction, disputed invoices, days past due and
     account status. The Company shall exercise its commercially reasonable
     efforts to collect the Closing Date Receivables of each Contributing Party
     and in no respect exercise collection efforts less than the efforts
     exercised by the Company with respect to its own receivables or the Closing
     Date Receivables of the other Contributing Party. During the Collection
     Period, each Contributing Party shall provide the Company with such
     assistance as the Company may request in connection with its collection
     efforts, including, without limitation, providing the Company with credit
     analysis files and collection history files and shall maintain its
     remittance and cash application processes in effect at the Closing Date.
     The "Collection Period" means the period not to exceed one hundred eighty
     (180) days from the Closing Date, commencing on the Closing Date to and
     including the earlier of the date on which (i) all Closing Date Receivables
     have been collected and payment therefore has been remitted to the
     Contributing Parties, (ii) the Company, at the request of each Contributing
     Party, has turned all outstanding Closing Date Receivables over to a
     collection agency selected by the Contributing Parties or (iii) the
     Contributing Parties request that the Company cease rendering collection
     services under this Section 8.4 with respect to all outstanding Closing
     Date Receivables, at which time each Contributing Party shall assume all
     responsibility with respect to the collection of any Closing Date
     Receivables of such Contributing Party that have not been collected as of
     such date, and the Company shall be relieved of all obligation and
     liability with respect to the collection of such uncollected receivables.
     With respect to any Closing Date Receivable, the Company retains the right
     to recommend extended collection action in lieu of transferring the balance
     to a collection agency, subject to the approval of the applicable
     Contributing Party.

          (b) If the Company receives payment of any Closing Date Receivable of
     a Contributing Party after the Closing, the Company shall remit such
     payment to the applicable Contributing Party, together with an accounting
     of its source.  For purposes of determining the amounts collected with
     respect to any Closing Date Receivables of a Contributing Party and
     receivables of the Company that have a common obligor or customer (a
     "Common Obligor"), amounts received from a Common Obligor shall, in the
     absence of a specific designation by the Common Obligor that a payment
     relates to a particular invoice, or the clear relationship of a payment to
     a particular invoice, e.g., a payment in the amount of its particular
     invoice, be applied to the then outstanding balance of the invoices in
     respect of Closing Date Receivables of the Contributing Parties for such
     Common Obligor in the order in which they were billed (i.e., applied first
     to the oldest Closing Date Receivable of either Contributing Party).

                                       40
<PAGE>

          (c) During the Collection Period, each Contributing Party shall
     provide the Company with aging reports on no less than a weekly basis for
     its respective Closing Date Receivables.  Such report shall indicate for
     each Closing Date Receivable:  the customer owing such receivable, the
     party to which the receivable is owed, the credit terms, the outstanding
     balance of such receivable, the date of invoice and days past due and
     account status.  Such aging reports shall indicate the aging of each
     Closing Date Receivable in thirty (30) day ranges and the Contributing
     Parties and the Company shall use such aging reports for managing the
     collection process.  In no event less than one week after receipt of the
     aging reports, the Company shall provide a combined aging report to each of
     the Contributing Parties which report shall combine the aging reports of
     the Contributing Parties and an aging report for the outstanding
     receivables of the Company containing the same information contained in the
     aging reports of the Contributing Parties.  The format of the combined
     aging report shall be mutually agreed by the Contributing Parties.  The
     Company shall provide a final combined aging report at the end of the
     Collection Period indicating, in addition to the matters set forth above,
     all payments made to each Contributing Party in respect of Closing Date
     Receivables (the "Final Report").

          (d) At the Closing Date, the Contributing Parties shall provide the
     Company with (i) a list of contact names of the personnel responsible for
     resolving disputed claims and/or missing documentation and (ii) a list of
     sales and order servicing personnel who should be advised in case specific
     collection issues arise with respect to their customers.  During the
     Collection Period, the Company and the Contributing Parties shall meet to
     assess the status of collection efforts at least once on or prior to the
     expiration of each thirty (30) day period commencing on the Closing Date.
     The Company may relinquish its collection responsibilities with respect to
     any individual Closing Date Receivable to the Contributing Party owning
     such Closing Date Receivable at any time upon the mutual agreement of the
     Company and such Contributing Party.

          (e) In consideration for the collection services provided by the
     Company pursuant to this Section 8.4, the Contributing Parties shall pay to
     the Company or its agent, as the Company may direct, an amount, in the
     aggregate, equal to $10,000 per month for the duration of the Collection
     Period, such amount to be allocated between the Contributing Parties based
     on actual activity.

                         Article IX  Employee Matters

     Section 9.1.  Offers of Employment.
                   --------------------

          (a) Each Contributing Party has developed and attached hereto as
     Schedules 9.1(a)(i) and 9.1(a)(ii) respectively, a list of all employees
     engaged in the Contributed Business of such Contributing Party as of the
     date of this Agreement, and shall update such list through the Closing Date
     ("Contributed Business Employees"). Contributed Business Employees who are
     members of a labor union or subject to a collective

                                       41
<PAGE>

     bargaining or other agreement as indicated in such Schedules 9.1(a)(i) and
     9.1(a)(ii), respectively, are sometimes referred to as "Union Employees".

          (b) Immediately following the Closing, the Company shall identify the
     Contributed Business Employees (subject to any further determination under
     this Section 9.1(b)) whose services it does not desire to lease from a
     Contributing Party.  Commencing on the Closing Date, all Contributed
     Business Employees excluding those identified by the Company pursuant to
     the forgoing sentence (the "Leased Employees") shall be leased by the
     Contributing Parties to the Company pursuant to the terms of the applicable
     Leased Employees Agreement.  The period from the Closing Date to the end of
     the term of the Leased Employees Agreements is referred to as the "Leasing
     Period".  From time to time during the Leasing Period, the Company may
     identify Leased Employees whose services it no longer needs to lease and,
     upon written notice from the Company to the Contributing Party, such
     individuals shall no longer be Leased Employees subject to the Leased
     Employees Agreement.  In addition, in the event that a Leased Employee
     terminates his or her employment with Apogee or PPG prior to the
     termination of the Leasing Period, and the Company desires to replace such
     Leased Employee, or the Company desires to obtain the services of
     additional employees during the Leasing Period, the Company shall direct
     PPG to hire such replacement and such replacement shall become a Leased
     Employee of PPG under the PPG Leased Employees Agreement.  The provisions
     of this Section 9.1(b) shall be subject to any requirements under
     collective bargaining agreements applicable to the Contributed Business
     Employees, such as requirements in respect of seniority in the event of
     termination of employment.

          (c) Prior to the termination of the Leasing Period, the Company shall
     offer employment to the Contributed Business Employees who are actively at
     work at the termination of the Leasing Period.  Leased Employees who are
     not actively at work at the end of the Leasing Period (excluding Leased
     Employees no longer subject to the Leased Employees Agreement) will be
     offered employment by the Company, provided that a job is available and
                                        --------
     provided that any such Leased Employee returns to active employment within
     --------
     twelve (12) months following the end of the Leasing Period.   Leased
     Employees who are not actively at work at the end of the Leasing Period
     (excluding Leased Employees no longer subject to the Leased Employees
     Agreement) and who are on short-term disability leave will be offered
     employment in accordance with this Section 9.1(c), provided, that such
                                                        --------
     Leased Employee obtains a medical release or other documentation reasonably
     satisfactory to the Company that evidences the employee's ability to
     perform the essential functions of his or her regular work, with or without
     reasonable accommodation.

          (d) Leased Employees who are offered employment with the Company and
     who accept such offer prior to the termination of the Leasing Period shall
     become employees of the Company as of the termination of the Leasing
     Period, unless such Leased Employees are not actively at work at the end of
     the Leasing Period, in which case, such Leased Employees shall become
     employees of the Company as of their return to work as described in Section
     9.1(c) above (such employees accepting the offer of

                                       42
<PAGE>

     employment with the Company, "Transferred Employees"). At the direction of
     the Company, each Contributing Party shall terminate the employment of all
     of its Leased Employees who become Transferred Employees as of the
     termination of the Leasing Period. At the direction of the Company, each
     Contributing Party shall provide Contributed Business Employees with COBRA
     and HIPPA notification as required by law upon termination of employment,
     subject to the Company's agreement (i) to assume any and all liability and
     obligation with respect to any and all claims incurred after Closing with
     respect to such Contributed Business Employees without regard to whether
     the Contributed Business Employee became a Leased Employee or a Transferred
     Employee and without regard to whether the claim arose out of coverage
     attributable to active employment or COBRA continuation coverage, and (ii)
     to indemnify and hold harmless such Contributing Party for any and all
     costs, fees, penalties and other expenses arising in connection with such
     claims.

          (e) The Company shall provide severance benefits to Contributed
     Business Employees of a Contributing Party who do not become Leased
     Employees, or who do not become Transferred Employees solely because they
     do not receive an offer of employment from the Company, equivalent to the
     severance benefits under the provisions of the severance plan maintained by
     the such Contributing Party.  Each Contributing Party shall provide such
     assistance as the Company may request in this regard; it being understood
     that the Company shall be solely responsible for all amounts paid to any
     such Contributed Business Employees pursuant to such severance plan.

          (f) Subject to Section 9.2(b)(i) below, Contributed Business Employees
     who receive an offer of employment from the Company shall not be eligible
     for severance benefits under the applicable Contributing Party's severance
     plan or otherwise whether or not such Contributed Business Employee accepts
     the offer.

                                       43
<PAGE>

     Section 9.2  Employee Benefits.
                  -----------------

          (a)     Service.

                  (i)  With respect to Transferred Employees who are not Union
          Employees, the Company shall recognize, for purposes of eligibility,
          vesting and benefit accrual under its Employee Plans, the prior
          service of each such Transferred Employee with a Contributing Party
          which has accrued up to such Transferred Employee's date of employment
          with Company.

                  (ii) With respect to Transferred Employees who are Union
          Employees, the Company shall bargain with the applicable collective
          bargaining representative for such Transferred Employees as to the
          Company's recognition, for purposes of eligibility, vesting and
          benefit accrual under its Employee Plans, of the prior service of each
          such Transferred Employees with a Contributing Party which has accrued
          up to such Transferred Employee's date of employment with Company.

          (b)     Severance.

                  (i)  With respect to Transferred Employees who are not Union
          Employees and whose jobs are eliminated by Company within twelve (12)
          months of the Closing Date, the Company shall provide such Transferred
          Employees with severance benefits not less than the benefits that
          would have been provided to such employee under the severance plan
          maintained by the applicable Contributing Party as of the Closing
          Date.

                  (ii) With respect to Transferred Employees who are Union
          Employees and whose jobs are eliminated by Company within twelve (12)
          months of the Closing Date, the Company shall provide such Transferred
          Employees with severance benefits in accordance with the applicable
          collective bargaining agreement or as otherwise negotiated with the
          applicable collective bargaining representative for such Transferred
          Employees.

          (c)     Employee Plans.

                  (i) Liabilities relating to claims of Contributed Business
          Employees, inactive employees of either Contributing Party (until such
          time as such inactive employees become Leased Employees or Transferred
          Employees), or in each case, eligible dependents thereof, for medical
          benefits incurred for medical services rendered to and purchases of
          prescription drugs and other health care products made by such persons
          while actively employed by such Contributing Party (or while an
          eligible dependent of such a person) prior to the Closing Date shall
          be retained by such Contributing Party.  In accordance with the
          Company's obligation to indemnify and hold harmless the Contributing
          Parties for all costs and expenses incurred in connection with the
          Contributed Business Employees on

                                       44
<PAGE>

          or following the Closing Date pursuant to the respective Leased
          Employee Agreements, all liabilities relating to claims of Contributed
          Business Employees, inactive business employees of either Contribution
          Party after such inactive employee becomes a Leased Employee or a
          Transferred Employee, and in either case eligible dependants thereof,
          for medical benefits incurred for medical services rendered to and
          purchases of prescription drugs and other health care products made by
          such persons on or following the Closing Date shall be the sole
          liability and responsibility of the Company. The Company shall
          recognize any deductible and stop-loss amounts paid by Transferred
          Employees and their eligible dependents under the Contributing Party's
          Employee Plans in the calendar year in which the Closing occurs toward
          any applicable calendar year deductible and stop-loss amounts under
          Company's Employee Plans.

               (ii) All Transferred Employees and their eligible dependents who
          are participating in the Employee Plans of a Contributing Party
          immediately prior to becoming a Transferred Employee shall be offered
          the opportunity to become participants in the Company's Employee Plans
          upon becoming employed by Company.  The Company shall, with respect to
          such Transferred Employees, waive any pre-existing medical condition
          restrictions and similar restrictions which may be contained in the
          Company's Employee Plans.  The eligibility of all other dependents of
          the Transferred Employees will be determined in accordance with the
          dependent eligibility provisions of the Company's Employee Plans.

          (d)  Pension Plans.

               (i)  With respect to Transferred Employees who are not Union
          Employees, the Company shall offer the applicable Company Defined
          Benefit Plan to such Transferred Employees previously employed by PPG
          who were participants in such plans during their employment with PPG
          prior to employment with the Company.  The Company shall not offer any
          other employee, including Transferred Employees previously employed by
          Apogee, the right to participate in any Company Defined Benefit Plan.

               (ii) The following shall apply only in respect of Transferred
          Employees who are Union Employees.  With respect to each multiemployer
          pension plan to which the Company is obligated to contribute on the
          Employee Transfer Date, if during the first five years beginning after
          the Employee Transfer Date, the Company ceases all covered operations
          or ceases to have an obligation to contribute for such operations with
          respect to facilities transferred to it by either Contributing Party,
          then and in that event, the Contributing Parties, jointly and
          severally, shall be secondarily liable for any withdrawal liability
          they would have had to any affected plan with respect to the
          operations but for the exemption from withdrawal liability obtained
          pursuant to Section 4204 of ERISA if such withdrawal liability of the
          Company with respect to any such plan is not paid.  The Contributing
          Parties intend that the foregoing be construed to meet the
          requirements of Section 4204(a)(1)(C) of ERISA. To the extent that
          other or

                                       45
<PAGE>

          additional agreements must be entered into to provide a Contributing
          Party with the benefits of Section 4204 of ERISA, the Company and the
          Contributing Party or Contributing Parties agree, on a prompt basis,
          to enter into such agreements.

          (e) Collective Bargaining Agreements.  Not later than the termination
     of the Leasing Period, the Company shall adopt immediately the collective
     bargaining agreements of each of Apogee and PPG for Transferred Employees
     of Apogee and of PPG, as applicable, who are Union Employees as a successor
     to such agreements.  The Company shall be bound by the rights and
     responsibilities for the terms and conditions made under such collective
     bargaining agreements and/or any bargaining obligations attached thereto.
     Prior to the termination of the Leasing Period, the Company shall direct
     each Contributing Party to satisfy its effects bargaining obligations under
     each of its respective collective bargaining agreements, and the Company
     shall pay all expenses relating thereto, and shall reimburse, indemnify and
     hold harmless each Contributing Party for any liability, cost or expenses
     incurred by such Contributing Party as a result of obligations pursuant to
     settlement of effects bargaining.

          (f) Transition Benefit.  Either Contributing Party may, in its sole
     discretion and at its sole cost, provide compensation ("Transition
     Benefit") to identified former employees of such Contributing Party who
     work for the Company in recognition of the differences between certain
     compensation and/or benefits which they may have had as employees of such
     Contributing Party, and such compensation and/or benefits which they may
     receive as employees of the Company.  At its sole discretion, the
     respective Contributing Party shall determine eligibility, amounts,
     benefits and rights and features of any such Transition Benefit with
     respect to its former employees.

     Section 9.3.  Company-Defined Benefit Pension Plans.
                   -------------------------------------

          (a)      Solely with respect to Contributed Business Employees of PPG
     who become Transferred Employees, effective on the Employee Transfer Date,
     the Company shall adopt defined benefit pension plans with substantially
     similar terms and conditions as the following PPG defined benefit pension
     plans as such plans exist on the Leasing Period Termination Date: (i) the
     PPG Retirement Income Plan, Appendix 1 (the "PPG Salaried Plan"), (ii) the
     PPG Retirement Income Plan, Appendix XX (the "PPG Nonunion Hourly Plan").
     (iii) the PPG Retirement Pension Plan, Appendix XX (the "PPG Memphis
     Plan"), (iv) the PPG Retirement Pension Plan, Appendix XX (the "PPG
     Greensboro Plan") and (v) the PPG Retirement Pension Plan, Appendix XX (the
     "PPG Lansing Plan"). Such defined benefit plans of PPG are referred to as
     the "PPG Defined Benefit Plans" and, as adopted by the Company, the
     "Company Defined Benefit Plans."

                   (i) Subject to consummation of the transfer of liabilities
          and assets contemplated by this Section 9.3, the Company Defined
          Benefit Pension Plans shall recognize all past service credited to the
          Transferred Employees of PPG as of the Leasing Period Termination
          Date, for all purposes under the applicable PPG Defined Benefit Plan.

                                       46
<PAGE>

               (ii)  PPG shall cause the PPG Defined Benefit Plans to transfer
          to and the Company Defined Benefit Plans shall assume all liabilities
          under the PPG Defined Benefit Plans with respect to Transferred
          Employees of PPG as of the Leasing Period Termination Date. PPG shall
          cause the PPG Defined Benefit Plans to transfer assets at least equal
          in value to the liabilities in the applicable plans, which transfer
          shall be to a designated fund of the Company (the "Company Fund")
          pursuant to a trust for the benefit of PPG Employees hired by the
          Company established by the Company which is qualified under Section
          501(a) of the Code.

               (iii) PPG shall cause the PPG Defined Benefit Plans to transfer
          any unrecognized gains and/or losses of a PPG Defined Benefit Plan
          attributable to Transferred Employees of PPG as of the Leasing Period
          Termination Date to the Company Fund effective on the Employee
          Transfer Date.

          (b) Solely with respect to Contributed Business Employees of PPG who
     become Transferred Employees, effective on the Employee Transfer Date, the
     Company shall adopt a non-qualified defined benefit pension plan with
     substantially similar terms and conditions as the PPG Nonqualified Pension
     Plan (such plan referred to as the "PPG Nonqualified Plan" and, as adopted
     by the Company, the "Company Nonqualified Plan").  The Company Nonqualified
     Plan shall recognize all past service credited to the Transferred Employees
     of PPG with eligibility under the PPG Nonqualified Plan as of the Leasing
     Period Termination Date, for all purposes under the PPG Nonqualified Plan.
     The liability for such past service shall be transferred to the Company
     effective on the Employee Transfer Date.

          (c) On and after the Employee Transfer Date, PPG shall remain solely
     responsible for all decisions related to the Company Defined Benefit
     Pension Plans and the Company Nonqualified Plan, including, but not limited
     to, funding, investment of assets, plan design and administration.  Any
     items of income or expense attributable to the Company Defined Benefit
     Plans will be allocated solely to PPG, as set forth in Section 12.2 of the
     LLC Agreement.

          (d) In the event of a dissolution and liquidation of the Company, any
     assets and liabilities of the Company Defined Benefit Plans shall not be
     considered assets of the Company for the purposes of distributions or
     otherwise, and such dissolution and liquidation shall not affect the rights
     and obligations of PPG with respect to such Company Defined Benefit Plans
     as set forth herein.  In the event of a termination of a Company Defined
     Benefit Plan (regardless of whether there has been a dissolution and
     liquidation of the Company), and such termination results in any reversion
     of assets to the Company, the Company will promptly distribute any assets
     and liabilities arising out of such Company Defined Benefit Plan to PPG.

          (e) The parties acknowledge and agree that nothing in this Article IX
     is intended to confer, nor shall anything in this Article IX be interpreted
     to confer, any

                                       47
<PAGE>

     rights, claims, privileges or benefits on any individual who is not a party
     to this Agreement, including, without limitation, any Contributed Business
     Employee.

                       Article X  Conditions to Closing

     Section 10.1.  Conditions to Apogee's Obligations.  The obligation of
                    ----------------------------------
Apogee to contribute and deliver, or to cause any Apogee Contributing Affiliate
to contribute or deliver,  the Apogee Assets to the Company and consummate the
other transactions contemplated by this Agreement shall be subject to the
satisfaction (or waiver by Apogee) on or prior to the Closing Date of all of the
following conditions:

          (a)       All representations and warranties of PPG contained in this
     Agreement shall be true and correct (without giving effect to materiality
     qualifications or Material Adverse Effect qualifications) at and as of the
     date hereof and at and as of the Closing Date (without taking into account
     any disclosures by PPG of discoveries, events or occurrences arising on or
     after the date hereof), except as and to the extent that any inaccuracies
     in such representations and warranties in the aggregate would not result in
     a Material Adverse Effect on PPG or a Material Adverse Effect on the
     Company.

          (b)       PPG shall have performed in all material respects all of the
     covenants and agreements required to be performed and complied with by it
     prior to the Closing Date.

          (c)       PPG shall have furnished Apogee with a certificate of its
     duly authorized officers evidencing compliance with the conditions set
     forth in Sections 10.1(a) and 10.1(b).

          (d)       Consummation of the transactions contemplated hereby and by
     the Ancillary Documents shall not have been restrained, enjoined or
     otherwise prohibited by any Applicable Law or Judgment of any Governmental
     Authority. No Governmental Authority shall have enacted any Applicable Law
     which would make illegal the consummation of the transactions contemplated
     hereby and thereby and no Proceeding with respect to the application of any
     such Applicable Law to such effect shall be pending.

          (e)       The applicable waiting period, including any extension
     thereof, under the HSR Act shall have expired or been terminated and
     neither the Department of Justice nor the Federal Trade Commission shall
     have instituted any litigation to enjoin or delay the consummation of the
     transactions contemplated hereby.

          (f)       PPG and the Company shall have executed and delivered the
     agreements set forth in Sections 4.3 and 4.5 to which they are party in the
     forms attached as exhibits hereto.

          (g)       The Company shall have obtained insurance coverage on terms
     substantially in the form as Exhibit O hereto.

                                       48
<PAGE>

          (h)       The Contributing Parties and the Company shall have mutually
     agreed on an initial Operating Budget and Strategic Plan for the Company.

     Section 10.2.  Conditions to PPG's Obligations.  The obligation of PPG
                    --------------------------------
to contribute and deliver the PPG Assets to the Company and consummate the other
transactions contemplated by this Agreement shall be subject to the satisfaction
(or waiver by PPG) on or prior to the Closing Date of all of the following
conditions:

          (a)       All representations and warranties of Apogee contained in
     this Agreement shall be true and correct (without giving effect to
     materiality qualifications or Material Adverse Effect qualifications) at
     and as of the date hereof and at and as of the Closing Date (without taking
     into account any disclosures by Apogee of discoveries, events or
     occurrences arising on or after the date hereof), except as and to the
     extent that any inaccuracies in such representations and warranties in the
     aggregate would not result in a Material Adverse Effect on Apogee or a
     Material Adverse Effect on the Company.

          (b)       Apogee shall have performed in all material respects all of
     the covenants and agreements required to be performed and complied with by
     it prior to the Closing Date.

          (c)       Apogee shall have furnished PPG with a certificate of its
     duly authorized officers evidencing compliance with the conditions set
     forth in Sections 10.2(a) and 10.2(b).

          (d)       Consummation of the transactions contemplated hereby and by
     the Ancillary Documents shall not have been restrained, enjoined or
     otherwise prohibited by any Applicable Law or Judgment of any Governmental
     Authority. No Governmental Authority shall have enacted any Applicable Law
     which would make illegal the consummation of the transactions contemplated
     hereby and thereby and no Proceeding with respect to the application of any
     such Applicable Law to such effect shall be pending.

          (e)       The applicable waiting period, including any extension
     thereof, under the HSR Act shall have expired or been terminated and
     neither the Department of Justice nor the Federal Trade Commission shall
     have instituted any litigation to enjoin or delay the consummation of the
     transactions contemplated hereby.

          (f)       Apogee, the applicable Apogee Contributing Affiliate and the
     Company shall have executed and delivered the agreements set forth in
     Sections 4.4 and 4.6 to which they are party in the forms attached as
     exhibits hereto.

          (g)       The Company shall have obtained insurance coverage on terms
     substantially in the form as Exhibit O hereto.

          (h)       The Contributing Parties and the Company shall have mutually
     agreed on an initial Operating Budget and Strategic Plan for the Company.

                                       49
<PAGE>

                     Article XI  Survival; Indemnification

     Section 11.1.  Survival of Representations and Warranties.  The
                    ------------------------------------------
representations and warranties contained in Article V and Article VI hereof
shall not survive the Closing.

     Section 11.2.  Indemnification by Apogee.  Apogee agrees to indemnify in
                    -------------------------
full the Company and PPG and its Affiliates and their respective officers,
directors, employees, agents and stockholders (collectively, the "Company/PPG
Indemnified Parties") and hold them harmless against any Losses which
Company/PPG Indemnified Parties may suffer, sustain or become subject to, as a
result of, arising in connection with or incident to:

          (a)       any breach of, or failure to perform, any covenant or
     agreement of Apogee or any of its Affiliates, including the Apogee
     Contributing Affiliates, contained in this Agreement or any of the
     Ancillary Documents;

          (b)       any attempt (whether or not successful) by any Person to
     cause or require the Company/PPG Indemnified Parties to pay any Liability
     of, or any claim (including, without limitation, Environmental Claims and
     Environmental Remediation Costs) against, Apogee or any Apogee Contributing
     Affiliate or any of their respective predecessors in interest in respect of
     any Apogee Excluded Liabilities; and

          (c)       Any and all Proceedings, Judgments and Losses, including
     reasonable legal fees and expenses, incident to any of the foregoing or
     incurred in investigating or attempting to avoid the same or to oppose the
     imposition thereof, or in enforcing this indemnity.

Any amount paid by Apogee to the Company/PPG Indemnified Parties in respect of
its indemnification obligations under this Section 11.2 shall not constitute an
asset contributed by Apogee to the Company pursuant to the LLC Agreement.

     Section 11.3.  Indemnification of Apogee by the Company.   The Company
                    ----------------------------------------
agrees to indemnify in full Apogee and its Affiliates, including the Apogee
Contributing Affiliates, and their respective officers, directors, employees,
agents and stockholders (collectively, the "Apogee Indemnified Parties") and
hold them harmless against any Losses which Apogee Indemnified Parties may
suffer, sustain or become subject to, as a result of, arising in connection with
or incident to:

          (a)       any breach of, or failure to perform, any covenant or
     agreement of the Company contained in this Agreement;

          (b)       any and all Assumed Liabilities (other than those caused by
     a breach of any representation or warranty or breach of, or failure to
     perform, any covenant or agreement of Apogee or any of its Affiliates,
     including the Apogee Contributing Affiliates, contained in this Agreement
     delivered to the Company hereunder or in connection herewith);

                                       50
<PAGE>

          (c)       Any and all Liabilities incurred or arising out of, based
     upon events or circumstances occurring in connection with or resulting from
     the operation of the Company Business after the Closing unless such
     Liability is an Excluded Liability, including, without limitation, from
     products sold after the Closing Date (except to the extent the Liability
     arises as a result of a claim against a Apogee or its Affiliates as
     manufacturer of the product unless such Liabilities arise as a result of
     the improper storage or distribution of products by the Company);

          (d)       Any and all Proceedings, Judgments and Losses, including
     reasonable legal fees and expenses, incident to any of the foregoing or
     incurred in investigating or attempting to avoid the same or to oppose the
     imposition thereof, or in enforcing this indemnity; and

          (e)       any post-Closing reorganization, rationalization or
     restructuring of the Contributed Business or the Company Business.

Any amount paid by the Company to the Apogee Indemnified Parties in respect of
its indemnification obligations under this Section 11.3 shall not constitute a
distribution by the Company to Apogee pursuant to the LLC Agreement.

     Section 11.4.  Indemnification by PPG.  PPG agrees to indemnify in full
                    ----------------------
the Company and Apogee and its Affiliates and their respective officers,
directors, employees, agents and shareholders (collectively, the "Company/Apogee
Indemnified Parties") and hold them harmless against any Losses which
Company/Apogee Indemnified Parties may suffer, sustain or become subject to, as
a result of, arising in connection with or incident to:

          (a)       any breach of, or failure to perform, any covenant or
     agreement of PPG or any of its Affiliates contained in this Agreement or
     any of the Ancillary Documents;

          (b)       any attempt (whether or not successful) by any Person to
     cause or require the Company/Apogee Indemnified Parties to pay any
     Liability of, or any claim (including, without limitation, Environmental
     Claims and Environmental Remediation Costs) against, PPG or any PPG
     Contributing Affiliate or any of their respective predecessors in interest
     in respect of any PPG Excluded Liabilities; and

          (c)       Any and all Proceedings, Judgments and Losses, including
     reasonable legal fees and expenses, incident to any of the foregoing or
     incurred in investigating or attempting to avoid the same or to oppose the
     imposition thereof, or in enforcing this indemnity.

Any amount paid by PPG to the Company/Apogee Indemnified Parties in respect of
its indemnification obligations under this Section 11.4 shall not constitute an
asset contributed by PPG to the Company pursuant to the LLC Agreement.

                                       51
<PAGE>

     Section 11.5.  Indemnification of PPG by the Company. The Company agrees
                    -------------------------------------
to indemnify in full PPG and its Affiliates and their respective officers,
directors, employees, agents and stockholders (collectively, the "PPG
Indemnified Parties") and hold them harmless against any Losses which PPG
Indemnified Parties may suffer, sustain or become subject to, as a result of,
arising in connection with or incident to:

          (a) any breach of, or failure to perform, any covenant or agreement of
     the Company contained in this Agreement;

          (b) any and all Assumed Liabilities (other than those caused by a
     breach of any representation or warranty or breach of, or failure to
     perform, any covenant or agreement of PPG or any of its Affiliates
     contained in this Agreement delivered to the Company hereunder or in
     connection herewith);

          (c) Any and all Liabilities incurred or arising out of, based upon
     events or circumstances occurring in connection with or resulting from the
     operation of the Company Business after the Closing, including, without
     limitation, from products sold after the Closing Date (except to the extent
     the Liability arises as a result of a claim against a PPG or its Affiliates
     as manufacturer of the product unless such Liabilities arise as a result of
     the improper storage or distribution of products by the Company);

          (d) Any and all Proceedings, Judgments and Losses, including
     reasonable legal fees and expenses, incident to any of the foregoing or
     incurred in investigating or attempting to avoid the same or to oppose the
     imposition thereof, or in enforcing this indemnity; and

          (e) any post-Closing reorganization, rationalization or restructuring
     of the Contributed Business or the Company Business.

Any amount paid by the Company to the PPG Indemnified Parties in respect of its
indemnification obligations under this Section 11.5 shall not constitute a
distribution by the Company to PPG pursuant to the LLC Agreement.

     Section 11.6.  Procedure for Indemnification. The procedure for
                    -----------------------------
indemnification under this Article X shall be as follows:

          (a) The party claiming indemnification (the "Claimant") shall promptly
     give written notice to the party from whom indemnification is claimed (the
     "Indemnifying Party") of any claim, whether between the parties or brought
     by a third party, specifying (i) in reasonable detail, the factual basis
     for such and (ii) in good faith, the estimated amount of the claim.  If the
     claim relates to a Proceeding filed by a third party against the Claimant,
     such notice shall be given by Claimant within ten (10) business days after
     written notice of such Proceeding was received by Claimant.  The failure of
     the Claimant to provide such written notice within the time period
     specified shall not relieve the Indemnifying Party of its indemnification
     liability under Section 11.2, 11.3, 11.4 or 11.5,

                                       52
<PAGE>

     unless such failure materially prejudices the rights of the Indemnifying
     Party in defending against the claim or Proceeding.

          (b) Following receipt of notice from the Claimant of a claim, the
     Indemnifying Party shall have thirty (30) days (or, if the claim involves
     an amount less than $50,000, ten (10) days) in which to make such
     investigation of the claim as the Indemnifying Party deems necessary or
     desirable. For the purposes of such investigation, the Claimant agrees to
     make available to the Indemnifying Party and its authorized Representatives
     the information relied upon by the Claimant to substantiate the claim.  If
     the Claimant and the Indemnifying Party agree at or prior to the expiration
     of said thirty (30) day  (or ten (10) day) period (or any mutually agreed
     upon extension thereof) to the validity and amount of such claim, the
     Indemnifying Party shall immediately pay to the Claimant the full amount of
     the claim. If the Claimant and the Indemnifying Party do not agree within
     said period (or any mutually agreed upon extension thereof), subject to
     clause (c) below with respect to third party claims, the dispute shall be
     resolved in accordance with the provisions of Section 13.11 hereof.

          (c) With respect to any claim by a third party as to which the
     Claimant is entitled to indemnification hereunder, the Indemnifying Party
     shall have the right, at its own expense, to participate in or assume
     control of the defense of such claim, and the Claimant shall cooperate
     fully with the Indemnifying Party, subject to reimbursement for actual out-
     of-pocket expenses incurred by the Claimant as the result of a request by
     the Indemnifying Party. Claimant shall have the right to approve legal
     counsel selected by Indemnifying Party, which approval shall not be
     unreasonably withheld. If the Indemnifying Party elects to assume control
     of the defense of any third-party claim, the Claimant shall have the right
     to participate in the defense of such claim with legal counsel of its own
     selection; provided, however, that the Claimant shall pay the fees and
                --------  -------
     expenses of such counsel unless the named parties to any such claim include
     both the Claimant and the Indemnifying Party and the Claimant has been
     advised by counsel that there may be one or more legal defenses available
     to it which are different from or additional to those available to the
     Indemnifying Party (in which case, if the Claimant informs the Indemnifying
     Party in writing that it elects to employ separate counsel at the expense
     of the Indemnifying Party, the Indemnifying Party shall not have the right
     to assume the defense of such claim on behalf of the Claimant), it being
     understood that the Indemnifying Party shall not, in connection with any
     one claim, be liable for the fees and expenses of more than one separate
     firm of attorneys at any time for the Claimant. If the Indemnifying Party
     does not elect to assume control or otherwise participate in the defense of
     any third party claim, it shall be bound by the results obtained by the
     Claimant with respect to such Claim; provided, however, that no settlement
                                          --------  -------
     or compromise of any claim which may result in any indemnification
     liability may be made by the Claimant without the prior written consent of
     the Indemnifying Party, which consent shall not be unreasonably withheld.
     No settlement or compromise of any claim may be made by the Indemnifying
     Party without the prior written consent of the Claimant, which consent
     shall not be unreasonably withheld.

                                       53
<PAGE>

     Section 11.7.  Exclusive Remedy; Adjustment
                    ----------------------------

          (a) The indemnification provisions in this Article XI shall be the
     exclusive remedy for any matter giving rise to a claim for indemnification
     set forth in this Agreement.

          (b) The parties shall make appropriate adjustments for insurance
     proceeds actually received in calculating Losses under this Agreement.

                           Article XII  Termination

     Section 12.1.  Termination.  This Agreement may be terminated at any time
                    -----------
prior to the Closing:

          (a) by the mutual written consent of the Contributing Parties; or

          (b) by a Contributing Party by written notice, without liability to
     the terminating party on account of such termination (provided the
                                                           --------
     terminating party is not otherwise in default or in breach of this
     Agreement), if the Closing shall not have occurred on or before the date
     which is one hundred eighty (180) days following the date of this
     Agreement.

     Section 12.2.  Effect on Obligations.  Termination of this Agreement
                    ---------------------
pursuant to Section 12.1 shall terminate all obligations of the parties
hereunder, except for their obligations under Sections 13.2 and 13.3; provided,
                                                                      --------
however, that termination pursuant to clause (b) of Section 12.1 shall not
-------
relieve the defaulting or breaching party from any liability to the other party
hereto.  Upon termination of this Agreement pursuant to Section 12.1, all
Ancillary Agreements that by their terms are to become effective as of the
Closing Date of this Agreement shall immediately terminate and shall have no
further force and effect.  Termination of this Agreement shall not affect the
obligations of the parties under any confidentiality agreements signed on or
prior to such date of termination.

                          Article XIII  Miscellaneous

     Section 13.1.  Notices.  Any notice or other communication to any party in
                    -------
connection with this Agreement shall be in writing and shall be sent by manual
delivery, facsimile transmission, overnight courier or United States mail (first
class, postage prepaid) if to a Contributing Party, to the address of the
Contributing Party set forth below or, if to the Company, to the principal
office of the Company as set forth in the LLC Agreement, or such other address
as a Contributing Party of the Company shall notify the other parties hereto in
writing. All periods of notice shall be measured from the date of delivery
thereof if manually delivered, when receipt is acknowledged if sent by facsimile
transmission, from the first business day after the date of sending if sent by
overnight courier, or from four (4) days after the date of mailing if mailed.

                                       54
<PAGE>

          If to the Company:

               PPG Auto Glass, LLC
               One PPG Place
               Pittsburgh, Pennsylvania 15272
               Attention:  President
               Telephone No.:   _____________
               Telecopier No.:  _____________

          If to Apogee:

               Apogee Enterprises, Inc.
               7900 Xerxes Avenue South, Suite 1800
               Minneapolis, Minnesota 55431-1159
               Attention: Vice President, Finance
               Telephone No.:  952/835-1874
               Telecopier No.: 952/896-2400

          With copies to:

               Apogee Enterprises, Inc.
               7900 Xerxes Avenue South, Suite 1800
               Minneapolis, Minnesota 55431-1159
               Attention: General Counsel
               Telephone No.:  952/835-1874
               Telecopier No.: 952/896-2400

               Dorsey & Whitney LLP
               220 South Sixth Street
               Minneapolis, Minnesota  55402
               Attention: Robert A. Rosenbaum, Esq.
               Telephone No.:  612/340-5681
               Telecopier No.: 612/340-8738

          If to PPG:

               PPG Industries, Inc.
               One PPG Place
               Pittsburgh, Pennsylvania 15272
               Attention: Vice President, Automotive Replacement Glass
               Telephone No.:  412/434-3464
               Telecopier No.: 412/434-3026

          With a copy to:

               PPG Industries, Inc.
               One PPG Place
               Pittsburgh, Pennsylvania 15272

                                       55
<PAGE>

               Attention: General Counsel
               Telephone No.:  412/434-2911
               Telecopier No.: 412/434-2490

     Section 13.2.  Press Releases and Announcements.  Neither party hereto
                    --------------------------------
shall issue any press release (or make any other public announcement) related to
this Agreement or the transactions contemplated hereby or make any announcement
to the employees, customers or suppliers of either party without prior written
approval of the other party hereto, except as may be necessary, in the opinion
of counsel to the party seeking to make disclosure, to comply with the
requirements of this Agreement or Applicable Law.  If any such press release or
public announcement is so required, the party making such disclosure shall
consult with the other party prior to making such disclosure, and the parties
shall use all reasonable efforts, acting in good faith, to agree upon a text for
such disclosure which is satisfactory to both parties.

     Section 13.3.  Expenses.  Except as otherwise expressly provided for
                    --------
herein, each Contributing Party shall pay all of its own expenses (and the
expenses of its Affiliates other than the Company) (in each case, including
attorneys' and accountants' fees), in connection with the negotiation of this
Agreement, the performance of its respective obligations hereunder and the
consummation of the transactions contemplated by this Agreement (whether
consummated or not); provided, however, that Apogee shall bear and agrees to pay
                     --------  -------
thirty-four percent (34%) and PPG shall bear and agrees to pay sixty-six percent
(66%) of the following costs, fees and expenses:  (i) the filing fees for
filings required under the HSR Act; (ii) the fees and expenses of the economist
engaged by the Contributing Parties relating to analysis of the transactions
contemplated hereby for antitrust purposes: and (iii) the fees and expenses of
Arthur Andersen LLP relating to the its engagement by the Contributing Parties
with respect to the transactions contemplated hereby.

     Section 13.4   Amendments; No Waivers.  Any provision of this Agreement
                    ----------------------
may be amended or waived if, and only if, such amendment or waiver is in writing
and is duly executed, in the case of an amendment, by the Company and the
Contributing Parties, or, in the case of a waiver, by the party to whom the
waiver is to be enforced.  No failure or delay by any party in exercising any
right, power or privilege under this Agreement shall operate as a waiver thereof
nor shall any single or partial waiver or exercise thereof preclude the
enforcement of any other right, power or privilege.  No course of dealing
between or among any parties will be deemed effective to modify or amend any
part of this Agreement or any rights or obligations of any party under or by
reason of this Agreement.

                                       56
<PAGE>

     Section 13.5.  Rights and Remedies Cumulative.  The rights and remedies
                    ------------------------------
provided by this Agreement are cumulative and the use of any one right or remedy
by any party shall not preclude or waive its right to use any or all other
remedies.  Said rights and remedies are given in addition to any other rights
the parties may have by law, statute, ordinance or otherwise.

     Section 13.6   Successors and Assigns.  This Agreement shall be binding
                    ----------------------
upon and inure to the benefit of the parties and their respective successors and
permitted assigns.  No party may assign or delegate or otherwise transfer any of
its rights or obligations hereunder without the prior written consent of the
other party.  Any attempted assignment in violation of this Section 13.6 shall
be null and void.

     Section 13.7.  Severability.  Whenever possible, each provision of this
                    ------------
Agreement will be interpreted in such manner as to be effective and valid under
Applicable Law, but if any provision of this Agreement is held to be prohibited
by or invalid under Applicable Law, such provision will be ineffective only to
the extent of such prohibition or invalidity, without invalidating the remainder
of such provision or the remaining provisions of this Agreement.

     Section 13.8.  Counterparts.  This Agreement may be executed in any
                    ------------
number of counterparts with the same effect as if all parties hereto had signed
the same document.  All counterparts shall be construed together and shall
constitute one instrument.

     Section 13.9.  Entire Agreement.  This Agreement, together with the
                    ----------------
Exhibits and Schedules and the other agreements, instruments and other documents
executed and/or delivered in connection herewith, constitute the entire
agreement among the parties pertaining to the subject matter hereof, and
supersede all prior oral and written, and all contemporaneous oral, agreements
and understandings pertaining thereto.  There are no agreements, understandings,
restrictions, warranties or representations relating to such subject matter
among the parties other than those set forth herein or in the Ancillary
Documents.

     Section 13.10. Governing Law.  This agreement, and the application or
                    -------------
interpretation hereof, shall be governed exclusively by its terms and by the
laws of the State of Delaware, without regard to principles of conflict of law.

     Section 13.11. Dispute Resolution.  Subject to the procedures set forth
                    ------------------
in Sections 3.2 and 11.6 hereof, the parties hereby agree that claims, disputes
or controversies of whatever nature, arising out of, in connection with, or in
relation to the interpretation, performance or breach of this Agreement (or any
other agreement contemplated by or related to this Agreement), including those
arising out of or relating to the breach, termination, enforceability, scope or
validity hereof (each, a "Dispute"), shall be resolved as follows:

          (a)  At the written request of any party to the Dispute, Apogee will
     direct its Chief Financial Officer and PPG will direct its Senior Vice
     President, Finance, to meet and negotiate in good faith to resolve the
     Dispute. The location, format, frequency, duration and conclusion of the
     negotiation shall be left to the discretion of the Contributing Parties,
     but may include participation by one or more of Representatives designated
     by either Contributing Party. Upon agreement between the Contributing

                                       57
<PAGE>

     Parties, the Contributing Parties may utilize other alternative dispute
     resolution procedures such as mediation to assist in the negotiations.
     Discussions and correspondence among the Representatives of the
     Contributing Parties for the purposes of these negotiations shall be
     treated as confidential information developed for the purposes of
     settlement, exempt from discovery and production, which shall not be
     admissible in the arbitration described below or in any lawsuit without the
     concurrence of both Contributing Parties.  Documents identified in or
     provided with such communications, which are not prepared for purposes of
     the negotiations, are not so exempted and may, if otherwise admissible, be
     admitted in evidence in the arbitration or lawsuit.

          (b)  If the negotiations required by Section 13.11(a) hereof do not
     resolve the Dispute within thirty (30) days after the initial written
     request, the Contributing Parties shall jointly select a neutral third
     party as a mediator to assist the Contributing Parties in resolving such
     Dispute, and continue to negotiate in good faith to resolve the Dispute.

          (c)  In the event that the mediation provided under subsection (b) of
     this Section 13.11 does not resolve the Dispute within forty-five (45) days
     after commencement thereof, then the parties will resolve such Dispute
     under the provisions of this subsection (c).  Any unresolved Dispute shall
     be settled by binding arbitration in accordance with the then current CPR
     Rules for Non-Administered Arbitration in effect on the date of the
     referral of such dispute to arbitration by three (3) independent and
     impartial arbitrators, none of whom shall be appointed by either party,
     provided however, at least one (1) arbitrator shall be a retired judge
     (collectively, the "Arbitrators").  The arbitration shall be governed by
     the Federal Arbitration Act, 9 U.S.C. (S)1-16 (the "Federal Arbitration
     Act") to the exclusion of state laws inconsistent therewith and judgment
     upon the award rendered by the Arbitrators may be entered by any court
     having jurisdiction thereof.  The Arbitrators are not empowered to award a
     monetary amount in excess of compensatory damages sufficient to reimburse
     fully and make whole the prevailing party for all direct, out-of-pocket
     costs and expenses, including reasonable attorney's fees, incurred by the
     prevailing party, it being understood that the prevailing party shall also
     be entitled to reimbursement for additional direct, out-of-pocket costs and
     expenses, including reasonable attorneys' fees, that must be incurred by
     such prevailing party after the date of the Arbitrators' award on account
     of the same set of facts and circumstances giving rise to that award.  Each
     party hereby irrevocably waives the right to recover any excess monetary
     damages with respect to disputes resolved by arbitration herein.  Either
     party shall have the right to seek, at its own cost and expense,
     preliminary and temporary injunctive relief solely to preserve the status
     quo of the parties, pending the Arbitrators' determination.  The following
     procedures shall apply:

               (i)  unless the parties agree otherwise, the place of arbitration
          shall be in Pittsburgh, Pennsylvania if the arbitration is initiated
          by Apogee and Minneapolis, Minnesota if the arbitration is initiated
          by PPG;

               (ii) the parties may review and delete potential Arbitrators
          from the panel list before final selection of the arbitration panel is
          made from such list;

                                       58
<PAGE>

               (iii)  prior to the actual arbitration hearing, each party shall
          provide the Arbitrators, in writing, with the exact ruling (monetary
          and/or otherwise) that it seeks the Arbitrators to render on its
          behalf;

               (iv)   the Arbitrators, acting by at least a two (2) to one (1)
          majority determination, must render their decision in favor of one
          party or the other in the exact form of the ruling requested by the
          prevailing party;

               (v)    the Arbitrators must determine the prevailing party by
          interpreting the meaning and intent of the language of the Agreement,
          applying the applicable law to the relevant facts and picking the
          arbitration ruling proposed by the party that most closely correlates
          to their decision based upon the Agreement, the applicable law and the
          relevant facts;

               (vi)   the losing party shall pay all costs, fees and expenses of
          the Arbitrators and the arbitration process charged to the parties.
          This does not include the cost of attorneys' fees, travel costs,
          preparation time or other costs incurred by the parties or their
          witnesses, including experts, which costs shall be paid by the party
          incurring them;

               (vii)  except as provided in the Federal Arbitration Act, the
          decision of the Arbitrators is final and binding on the parties, and
          no appeal of any kind may be taken;

               (viii) unless otherwise provided in the Agreement, the statute
          of limitations of the State of Delaware applicable to the commencement
          of a lawsuit shall apply to the commencement of an arbitration
          hereunder, except that no defenses shall be available based upon the
          passage of time during any negotiation or mediation called for by
          subsection (b) of this Section 13.11; and

               (ix)   in the event of any inconsistency or conflict between this
          subsection (c) of Section 13.11 and the applicable CPR Rules for Non-
          Administered Arbitration, this subsection (c) of Section 13.11 shall
          govern and control.

    [Remainder of page left blank intentionally.  Signature page follows.]

                                       59
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their respective authorized officers as of the date and year
first above written.

                                    APOGEE ENTERPRISES, INC.

                                    By: /s/ Robert G. Barbieri
                                        -------------------------------
                                    Name: Robert G. Barbieri
                                    Title: Chief Financial Officer

                                    THE GLASS DEPOT, INC.

                                    By: /s/ Robert G. Barbieri
                                        -------------------------------
                                    Name: Robert G. Barbieri
                                    Title: Chief Financial Officer

                                    THE GLASS DEPOT OF NEW YORK, INC.

                                    By: /s/ Robert G. Barbieri
                                        -------------------------------
                                    Name: Robert G. Barbieri
                                    Title: Chief Financial Officer

                                    HARMON GLASS COMPANY

                                    By: /s/ Robert G. Barbieri
                                        -------------------------------
                                    Name: Robert G. Barbieri

                                    AMERICAN MANAGEMENT GROUP

                                    By: /s/ Robert G. Barbieri
                                        -------------------------------
                                    Name: Robert G. Barbieri
                                    Title: Chief Financial Officer

                                    DOVER GLASS COMPANY

                                    By: /s/ Robert G. Barbieri
                                        -------------------------------
                                    Name: Robert G. Barbieri
                                    Title: Chief Financial Officer

                                       60
<PAGE>

                                   PPG INDUSTRIES, INC.

                                   By: /s/ Garry A. Goudy
                                       -------------------------------
                                   Name: Garry A. Goudy
                                   Title: Vice President, ARG

                                   PPG AUTOGLASS, LLC

                                   By: /s/ Mark J. Orcutt
                                       -------------------------------
                                   Name: Mark J. Orcutt
                                   Title: President

                                       61<PAGE>

                                                                    EXHIBIT 10.2

                             PPG AUTO GLASS, LLC

                     LIMITED LIABILITY COMPANY AGREEMENT

                                 June 13, 2000
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<S>                                                                                                       <C>
Article I.          General...........................................................................     1
     Section 1.1.   Name..............................................................................     1
     Section 1.2.   Principal Place of Business.......................................................     1
     Section 1.3.   Names and Addresses of Members....................................................     2
     Section 1.4.   Term of Existence.................................................................     2
     Section 1.5.   Agent for Service of Process......................................................     2
     Section 1.6.   Duties of Members.................................................................     2
     Section 1.7.   Duties of Managers................................................................     2
Article II.    Definitions............................................................................     2
Article III.   Purpose and Character of the Business..................................................     9
Article IV.    Members................................................................................     9
     Section 4.1.   Place and Time of Meetings........................................................     9
     Section 4.2.   No Annual Meetings................................................................    10
     Section 4.3.   Meetings..........................................................................    10
     Section 4.4.   Quorum, Adjourned Meetings........................................................    10
     Section 4.5.   Organization......................................................................    10
     Section 4.6.   Order of Business.................................................................    11
     Section 4.7.   Voting............................................................................    11
     Section 4.8.   Certain Actions...................................................................    11
     Section 4.9.   Notices of Meetings...............................................................    12
     Section 4.10.  Proxies...........................................................................    12
     Section 4.11.  Waiver of Notice..................................................................    12
     Section 4.12.  Written Action....................................................................    13
Article V.     New Members; Additional Equity Interests; Securities...................................    13
     Section 5.1.   Admission of New Members..........................................................    13
     Section 5.2.   Issuance of Additional Equity Interests...........................................    13
Article VI.   Management and Operation of Company Business............................................    13
     Section 6.1.   Authority of the Members..........................................................    13
     Section 6.2.   Board of Managers.................................................................    13
     Section 6.3.   Number, Qualification; Term of Office; Vote.......................................    14
     Section 6.4.   Initial Board.....................................................................    14
     Section 6.5.   Place of Meetings.................................................................    14
     Section 6.6.   Meetings..........................................................................    14
     Section 6.7.   Meetings Held Upon Member Demand..................................................    14
     Section 6.8.   Adjournments......................................................................    14
     Section 6.9.   Notice of Meetings................................................................    15
     Section 6.10.  Quorum............................................................................    15
     Section 6.11.  Absent Members....................................................................    15
     Section 6.12.  Conference Communications.........................................................    15
</TABLE>

                                      -i-
<PAGE>

<TABLE>
<S>                                                                                                        <C>
     Section 6.13.  Removal............................................................................    15
     Section 6.14.  Acts of Managers...................................................................    15
     Section 6.15.  Certain Actions....................................................................    15
     Section 6.15A. Litigation Matters.................................................................    18
     Section 6.15B. Operating Policies.................................................................    18
     Section 6.15C. Budget Preparation; Approvals and Delegation of Authority..........................    18
     Section 6.16.  Written Action.....................................................................    19
     Section 6.17.  Proxies............................................................................    19
     Section 6.18.  Committees.........................................................................    19
     Section 6.19.  Compensation.......................................................................    19
Article VII.   Officers................................................................................    20
     Section 7.1.   Number.............................................................................    20
     Section 7.2.   Election, Term of Office and Qualifications........................................    20
     Section 7.3.   Removal and Vacancies..............................................................    20
     Section 7.4.   Chair..............................................................................    21
     Section 7.5.   President..........................................................................    21
     Section 7.6.   Chief Financial Officer............................................................    21
     Section 7.7.   Secretary..........................................................................    21
     Section 7.8.   Director of Human Resources........................................................    22
     Section 7.9.   Controller.........................................................................    22
     Section 7.10.  Regional Vice Presidents...........................................................    22
     Section 7.11.  Duties of Other Officers...........................................................    22
     Section 7.12.  Compensation.......................................................................    22
Article VIII.  Indemnification.........................................................................    22
     Section 8.1.   Indemnification....................................................................    22
     Section 8.2.   Indemnification Procedures; Survival...............................................    24
Article IX.    Transfers...............................................................................    25
     Section 9.1.   Registration, Transfer and Exchange................................................    25
     Section 9.2.   Restriction on Transfers...........................................................    25
     Section 9.3.   Transfer by Legal Process..........................................................    25
     Section 9.4.   Conditions to Permitted............................................................    26
     Section 9.5.   Resignation........................................................................    27
Article X.     Books of Account; Reports and Fiscal Matters............................................    27
     Section 10.1.  Books; Place; Access...............................................................    27
     Section 10.2.  Annual Strategic Plan..............................................................    27
     Section 10.3.  Operating Budget...................................................................    27
     Section 10.4.  Financial Information..............................................................    28
     Section 10.5.  Tax Information....................................................................    30
     Section 10.6.  Tax Matters Partner................................................................    31
     Section 10.7.  Tax Elections......................................................................    31
Article XI.    Capital.................................................................................    31
     Section 11.1.  Initial Capital Contributions......................................................    31
     Section 11.2.  Additional Capital Contributions...................................................    31
</TABLE>

                                     -ii-
<PAGE>

<TABLE>
<S>                                                                                                        <C>
     Section 11.3.  Special Capital Contributions......................................................    31
     Section 11.4.  No Right to Return of Contribution.................................................    32
     Section 11.5.  Loans to the Company; No Interest on Capital.......................................    32
     Section 11.6.  Creditor's Interest in the Company.................................................    32
     Section 11.7.  Liability of Members...............................................................    32
     Section 11.8.  Capital Accounts...................................................................    33
     Section 11.9   Termination of Defined Benefit Plans...............................................    33
Article XII.   Allocation of Profits and Losses........................................................    33
     Section 12.1.  Allocation of Profits and Losses...................................................    33
     Section 12.2.  Allocation of Profits and Losses - Special Allocations.............................    33
     Section 12.3.  Limitation on Loss Allocation......................................................    33
     Section 12.4.  Regulatory Allocations.............................................................    34
     Section 12.5.  Tax Allocations:  Section 704(c) of the Code.......................................    34
     Section 12.6.  Other Allocation Rules.............................................................    34
Article XIII.  Distributions...........................................................................    35
     Section 13.1.  Distributions......................................................................    35
     Section 13.2   Advance Distributions for Basket Amounts...........................................    35
     Section 13.3.  Limitations on Distributions.......................................................    39
Article XIV.   Rights in the Event of a Change in Control of a Member and Poor Financial Performance...    39
     Section 14.1.  PPG Purchase Rights Upon a Change in Control of Apogee.............................    39
     Section 14.2   Apogee Repurchase Right Upon a Change in Control of PPG's Glass Business...........    41
     Section 14.3   Apogee's Rights in the Event of Poor Financial Performance.........................    42
     Section 14.4   PPG's Rights in the Event of Poor Financial Performance............................    45
Article XV.    Dissolution and Liquidation.............................................................    46
     Section 15.1.  Events Causing Dissolution.........................................................    46
     Section 15.2.  Continuation of Business...........................................................    46
     Section 15.3.  Liquidation and Winding Up.........................................................    46
     Section 15.4.  Compliance with Timing Requirements of Regulations.................................    47
Article XVI.   Amendment...............................................................................    48
Article XVII.  Approval of Reorganizations and Bankruptcy..............................................    48
Article XVIII. Representations and Warranties of the Members...........................................    48
     Section 18.1.  Representations and Warranties of the Members......................................    48
Article XIX.   Miscellaneous Provisions................................................................    49
     Section 19.1.  Channel Conflict; Confidentiality and Nonsolicitation..............................    49
     Section 19.2.  Additional Actions and Documents...................................................    51
     Section 19.3.  Notice.............................................................................    51
     Section 19.4.  Severability.......................................................................    51
     Section 19.5.  Survival...........................................................................    52
     Section 19.6.  Waivers............................................................................    52
     Section 19.7.  Exercise of Rights.................................................................    52
     Section 19.8.  Binding Effect.....................................................................    52
</TABLE>

                                     -iii-
<PAGE>

<TABLE>
     <S>                                                                                                  <C>
     Section 19.9.  Limitation on Benefits of this Agreement..........................................    52
     Section 19.10. Waiver of Partition...............................................................    52
     Section 19.11. Entire Agreement..................................................................    52
     Section 19.12. Pronouns..........................................................................    53
     Section 19.13. Headings..........................................................................    53
     Section 19.14. Governing Law.....................................................................    53
     Section 19.15. Dispute Resolution................................................................    53
     Section 19.16. Jurisdiction; Venue; Process......................................................    56
     Section 19.17. Execution in Counterparts.........................................................    56
</TABLE>

                                     -iv-
<PAGE>

                      LIMITED LIABILITY COMPANY AGREEMENT
                                      OF
                              PPG AUTO GLASS, LLC

          THIS LIMITED LIABILITY COMPANY AGREEMENT made and entered into as of
this 13/th/ day of June, 2000, by and between the Persons (as defined in Article
II) named on Schedule A attached hereto (hereinafter, such Persons are referred
to collectively as the "Members" and individually as a "Member");

          WHEREAS, the undersigned will constitute all of the initial Members of
PPG Auto Glass, LLC, a Delaware limited company (the "Company") upon the first
day of the commencement of the Company's operations;

          NOW, THEREFORE, in consideration of the premises, the mutual covenants
and agreements hereinafter set forth, and other good and valuable consideration,
the receipt and adequacy of which are hereby acknowledged, the Members,
intending to be legally bound, agree as follows:

                                  Article I.
                                    General
                                    -------

          The parties hereto hereby agree that this Agreement constitutes the
"limited liability company agreement" of the Company within the meaning of
Section 18-101(7) of the Delaware Limited Liability Company Act, as amended (the
"Act"), and hereby adopt, approve and ratify the execution and filing in the
office of the Secretary of State of the State of Delaware of the certificate of
formation of the Company by Joseph W. Wirth, an individual resident of the State
of Minnesota, on June 12, 2000 (the "Certificate of Formation") in the form
attached hereto as Exhibit 1 and acknowledge, approve and ratify his designation
as an "authorized person" of the Company in the Certificate of Formation as
contemplated by Section 18-201(a) of the Act.  The parties agree that the
Agreement shall be effective as of the Closing (as defined herein) and that they
shall comply with the provisions and requirements of the Act and that the Act
shall govern the rights, duties and obligations of the Members, except as
otherwise expressly stated herein.

          Section 1.1.  Name.  The name of the Company shall be, and the
                        ----
business shall be conducted, upon the Closing under the name of, "PPG Auto
Glass, LLC."

          Section 1.2.  Principal Place of Business.  The location of the
                        ---------------------------
principal place of business of the Company shall be Pittsburgh, Pennsylvania or
such other place as the Board of Managers (as defined in Article II) may from
time to time determine (the "Principal Office").

          Section 1.3.  Names and Addresses of Members.  The names and
                        ------------------------------
addresses of the Members are as set forth in Schedule A hereto.
<PAGE>

          Section 1.4.  Term of Existence.  The Company shall be formed as of
                        -----------------
the time of the filing of the Certificate of Formation in the Office of the
Secretary of State of Delaware and its term of existence shall be perpetual,
unless earlier terminated, dissolved or liquidated in accordance with the
provisions of this Agreement.

          Section 1.5.  Agent for Service of Process.  The name and address of
                        ----------------------------
the agent for service of process is, until changed by the Board of Managers, The
Corporation Trust Company, located at Corporation Trust Center, 1209 Orange
Street, Wilmington, New Castle County, Delaware  19801.

          Section 1.6.  Duties of Members.  The only duties of the Members to
                        -----------------
the Company or to each other in respect of the Company shall be those
established in this Agreement, and there shall be no other express or implied
duties of the Members to the Company or to each other in respect of the Company.

          Section 1.7.  Duties of Managers.  Each Manager (as defined in
                        ------------------
Article II) shall owe duties of care and loyalty to the Company and the Members.
A Manager shall not be personally liable to the Company or the Members for
monetary damages for breach of fiduciary duty as a Manager except (a) for any
breach of the Manager's duty of loyalty to the Company or the Members; (b) for
acts or omissions not in good faith or that involve intentional misconduct or a
knowing violation of law; or (c) for any transaction from which such Manager
derived an improper personal benefit.

                                  Article II.
                                  Definitions
                                  -----------

          Unless the context otherwise specifies or requires, the terms defined
in this Article II shall, for the purposes of this Agreement, have the meanings
herein specified.  Certain other capitalized terms used herein are defined
elsewhere in the Agreement.

          "Act" means the Delaware Limited Liability Company Act, as amended
           ---
from time to time.

          "Affiliate" means, when used with reference to a specified Person, (i)
           ---------
any Person that directly or indirectly through one or more intermediaries
Controls or is Controlled by or is under common Control with the specified
Person, (ii) any Person that is an officer, partner or trustee of, or serves in
a similar capacity with respect to, the specified Person or of which the
specified Person is an officer, partner or trustee, or with respect to which the
specified Person serves in a similar capacity, (iii) any Person that, directly
or indirectly, is the beneficial owner of 10% or more of any class of equity
securities of, or otherwise has a substantial beneficial interest in, the
specified Person or of which the specified Person has a substantial beneficial
interest, and (iv) any relative or spouse of the specified Person.

                                       2
<PAGE>

          "Affiliated Group Subsidiary" shall mean, with respect to any person,
           ---------------------------
any Person, any other Person of which such first Person owns, either directly or
through its Subsidiaries or Affiliates, more than 50% of (i)the total combined
voting power of all classes of voting securities of such second Person, (ii) the
capital or profit interests therein, or (iii) otherwise has the power to elect a
majority of the board of directors, managers or trustees or similar managing
body.

          "Agreement" means this Limited Liability Company Agreement, as it may
           ---------
be amended or supplemented from time to time.

          "Apogee" means Apogee Enterprises, Inc.
           ------

          "Board of Managers" means the Board of Managers of the Company
           -----------------
established pursuant to Article VI hereof.

          "Board Supermajority" means at least 80% of the members of the Board
           -------------------
of Managers; provided, that a Board Supermajority shall in all instances include
             --------
at least one Manager designated by Apogee and one Manager designated by PPG.

          "Capital Account" is defined in Section 11.8 hereof.
           ---------------

          "Capital Contribution" means the amount of money or the value of the
           --------------------
property (as agreed by the Members as of the date of contribution) contributed
to the Company by any Member, either pursuant to the Contribution Agreement or
otherwise.

          "Capital Expenditures" means for any period, the sum, without
           --------------------
duplication, of:  (i) the aggregate amount of all expenditures of the Company
for fixed or capital assets made during such period which, in accordance with
GAAP, would be classified as capital expenditures, (ii) the aggregate amount of
all capitalized lease liabilities, as determined in accordance with GAAP,
incurred during such period; and (iii) the purchase price for all acquisitions.

          "Capital Expenditure Budget" means the annual budget with respect to
           --------------------------
Capital Expenditures to be approved by the Board of Managers on an annual basis,
which budget will be included within the Operating Budget.

          "Chair" is defined in Section 7.4 hereof.
           -----

          "Change in Control" with respect to any entity means:
           -----------------

          (a) any "person" (as such term is used in Sections 13(d) and 14(d) of
the Exchange Act) who did not own shares of the capital stock of such entity on
the date hereof becomes the "Beneficial Owner" (as such term is defined in Rule
13d-3 promulgated under the Exchange Act), directly or indirectly, of securities
of such entity representing 50% or more of the combined voting power of such
entity's then outstanding securities; or

                                       3
<PAGE>

          (b)  a change in control of a nature that would be required to be
reported in response to Item 6(e) of Schedule 14A of Regulation 14A promulgated
under the Exchange Act, or successor provision thereto, whether or not such
entity is then subject to such reporting requirements including, without
limitation, any of the following events:

               (i)    the consummation of any consolidation, combination or
     merger of such entity in which such entity is not the continuing or
     surviving corporation or pursuant to which shares of such entity's common
     stock would be converted into cash, securities, or other property, other
     than a merger of such entity in which the holders of such entity's common
     stock immediately prior to the consolidation, combination or merger have
     the same proportionate ownership of common stock of the surviving
     corporation immediately after the merger;

               (ii)   any sale, lease, exchange or other transfer (in one
     transaction or a series of related transactions) of all, or substantially
     all, of the assets of such entity, or

               (iii)  a corporate spin-off or spin-out or other similar
     Reorganization transaction;

provided, however, that, if any of the foregoing transactions is consummated
--------  -------
with a Permitted Transferee, such transaction shall not be deemed to be a Change
in Control transaction for purposes of Article XIV hereof.

          "Chief Financial Officer" is defined in Section 7.6 hereof.
           -----------------------

          "Closing" means the first day of the commencement of the business
           -------
operations of the Company in connection with the consummation of the
transactions contemplated by the Contribution Agreement.

          "Code" means the Internal Revenue Code of 1986, as amended, and the
           ----
Treasury Regulations promulgated thereunder.  Any reference in this Agreement to
a Section of the Code or the Treasury Regulations shall be considered also to
include any subsequent amendment or replacement of that Section.

          "Company" means PPG Auto Glass, LLC, the Delaware limited liability
           -------
company formed pursuant to the filing of the Certificate of Formation in
Delaware and the terms of this Agreement.

          "Confidential Information" means information disclosed to a Member or
           ------------------------
known by a Member as a consequence of, or through his relationship with, the
Company, about the customers, suppliers, employees (including compensation paid
to employees or other terms of employment), operations, processes, products,
inventions, business methods, principals, marketing methods, costs, prices,
contractual relationships, regulatory status, trade secrets, public relations
methods, organization, procedures or finances, including, without limitation,
information of or relating to customer lists of the Company and its
Subsidiaries.

                                       4
<PAGE>

          "Contribution Agreement" means that certain Contribution and
           ----------------------
Assumption Agreement by and among PPG Auto Glass LLC, Apogee Enterprises, Inc.
and PPG Industries, Inc. dated as of the date hereof.

          "Control" (including, with correlative meanings, the terms "controlled
           -------
by" and "under common control with"), as applied to any Person, means the
possession, direct or indirect, of the power to direct or cause the direction of
the management and policies of such Person, whether through the ownership of
voting securities or other ownership interests, by contract or otherwise.

          "Debt/Cap. Ratio" means, as of any date, the outstanding principal
           ---------------
under the Company's then-current credit facility divided by the total
capitalization of the Company as it appears on the Company's most recent month-
end balance sheet, without giving effect to any Basket Loans outstanding.

          "Defined Benefit Plans" means the tax qualified and non-qualified
           ---------------------
defined benefit pension plans sponsored by the Company which were created
pursuant to the Contribution Agreement as result of contributions by PPG, other
than the Money Purchase Plan for union employees at Location 384 (South Bend)
and Location 207 (Fenton).

          "EBIT" means the Company's consolidated earnings before interest and
           ----
taxes, as determined from the financial statements of the Company, prepared in
accordance with Section 10.4 hereof, for the relevant period.

          "EBITDA" means the Company's consolidated earnings before interest,
           ------
taxes, depreciation and amortization, as determined from the financial
statements of the Company, prepared in accordance with Section 10.4 hereof, for
the relevant period.

          "Equity Percentage" means the percentage of the outstanding equity
           -----------------
interest of the Company held by a Member at any date; as of the date hereof,
Equity Percentage for any Member means the percentage set forth for such Member
on Schedule A attached hereto.  The Equity Percentage of a Member shall not
change except as specifically contemplated by this Agreement.  The Equity
Percentage of a Member shall not be affected by changes in the Capital Account
amounts.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended.
           ------------

          "Fiscal Year" means the twelve (12) month accounting period of the
           -----------
Company ending on December 31 of each year, or such other date as the Board of
Managers may determine from time to time.

          "Manager" is defined in Section 6.3 hereof.
           -------

                                       5
<PAGE>

          "Membership Interest" means the entire Equity Percentage interest of a
           -------------------
Member in the Company at any particular time, including, without limitation, the
right of such Member to any and all benefits to which a Member may be entitled
as provided in this Agreement and under law, together with the obligations of
such Member to comply with all of the terms and provisions set forth in this
Agreement and under law.

          "Members" means the Persons executing this Agreement from the Closing
           -------
until they cease to be Members and the Persons that are hereafter admitted to
the Company as Members in accordance with this Agreement, it being understood
that the Persons executing this Agreement shall only become Members upon making
their initial Capital Contributions as contemplated by the Contribution
Agreement in connection with the Closing.

          "Member Special Vote" means 100% of the Equity Percentage of all
           -------------------
Members.

          "Minority Member" means the Member having a Membership Interest
           ---------------
representing less than a 50% Equity Percentage.

          "Named Officers" is defined in Section 7.1 hereof.
           --------------

          "Net Cash Flow" means the cash proceeds from Company operations
           -------------
including sales and dispositions of property, changes in working capital,
dividends, interest and royalties, if any, less cash used for (i) operating
expenditures (including supply and inventory purchases), (ii) Capital
Expenditures, and (iii) payment of scheduled, mandatory principal and/or
interest payments coming due under the Company's then-current credit facility.
Net Cash Flow shall not be reduced or increased by any amounts received or owed
by the Company in connection with any transaction pursuant to Section 13.2
(Basket Transactions) or any amounts received or owed by the Company in
connection with the Defined Benefit Plans of the Company.

          "Nonsolicitation Period" means the period commencing on the Closing
           ----------------------
and ending on the date on which the Member in question no longer has a
Membership Interest.

          "Operating Budget" is defined in Section 10.3 hereof.
           ----------------

          "Permitted Transferee" shall mean, with respect to any specified
           --------------------
Person, a Person that directly, or indirectly through one or more
intermediaries, Controls, is Controlled by or is under common Control with, such
specified Person, including, without limitation, each Affiliated Group
Subsidiary of such Person, at the time at which the determination of affiliation
is being made.

          "Person" means any natural person, corporation, limited liability
           ------
company, association, partnership (whether general or limited), joint venture,
proprietorship, governmental agency, trust, estate, association, custodian,
nominee or any other individual or entity, whether acting in an individual,
fiduciary, representative or other capacity.

          "PPG" means PPG Industries, Inc.
           ---

                                       6
<PAGE>

          "PPG Funding Account" means a special bookkeeping account of the
           -------------------
Company established for the purpose of funding the Defined Benefit Plans of the
Company.

          "President" is defined in Section 7.5 hereof.
           ---------

          "Principal Office" is defined in Section 1.2 hereof.
           ----------------

          "Profits" or "Losses" mean, for each Fiscal Year, (a) for tax
           -------      ------
purposes, an amount equal to the Company's taxable income or loss for such year
or period, determined in accordance with Code Section 703(a) (for this purpose,
all items of income, gain, loss, or deduction required to be stated separately
pursuant to Code Section 703(a)(1) shall be included in taxable income or loss),
with the adjustments indicated in the Tax Matters Exhibit, (b) for Capital
Account maintenance purposes, an amount equal to the Company's taxable income or
loss for such year or period, determined in accordance with Code Section 704 and
the regulations thereunder, with the adjustments indicated in the Tax Matters
Exhibit, and (c) for financial reporting purposes, an amount equal to the
Company's income or loss for such year or period, determined in accordance with
the accounting principles of US GAAP.

          "Reorganization" means (a) any consolidation, combination or merger of
           --------------
the Company with or into any other Person, whether or not the Company is the
surviving entity, (b) any sale, exchange or other transaction pursuant to which
outstanding Membership Interests are converted into other securities, property
or money or (c) any sale, transfer or other disposition of all or substantially
all of the Company's assets in a single transaction or a series of related
transactions.  A dissolution or liquidation of the Company pursuant to Article
XV hereof will not constitute a "Reorganization" within the meaning of this
Agreement.

          "Secretary" is defined in Section 7.7 hereof.
           ---------

          "Special Capital Contributions" means a contribution to the capital of
           -----------------------------
the Company pursuant to Section 11.3 hereof to fund an expenditure which shall
be charged solely to the Capital Account of the Member making the Special
Capital Contribution.

          "Strategic Plan" is defined in Section 10.2.
           --------------

          "Strategy Value" means the value of the Company determined by making a
           --------------
three (3) year discounted cash flow analysis (without including any terminal
value and prior to the payment of any dividends to the Members), using PPG's
then-current cost of capital (which, as of the date hereof, is 12.5% per year).
In determining the Strategy Value, the calculation methodology and the weighted
average cost of capital rate shall be consistent when calculating the percentage
deviation between year over year Strategy Values.

          "Subsidiary" means any other Person (i) whose securities having a
           ----------
majority of the general voting power in electing the board of directors or
equivalent governing body of such other Person (excluding securities entitled to
vote only upon the failure to pay dividends thereon

                                       7
<PAGE>

or the occurrence of other contingencies) are, at the time as of which any
determination is being made, owned by such Person either directly or indirectly
through one or more other entities constituting Subsidiaries or (ii) more than a
50% interest in the profits or capital of whom is, at the time as of which any
determination is being made, owned by such Person either directly or indirectly
through one or more other entities constituting Subsidiaries.

          "Tax Matters Exhibit" means Exhibit 2 to this Agreement.
           -------------------        ---------

          "Transfer" means the sale, assignment, transfer, conveyance,
           --------
withdrawal, mortgage, pledge, hypothecation, exchange or other disposition of
(including through any merger, share exchange or consolidation) any part or all
of a Member's Membership Interest, whether or not for value and whether such
disposition is voluntary, involuntary, by operation of law or otherwise.

          "Treasury Regulations" or "Treas. Reg." refers to the regulations
           --------------------      -----------
promulgated by the United States Treasury Department under the Code.

                         Index of Other Defined Terms
                         ----------------------------

               Term                                   Article or Section
               ----                                   ------------------
          Adjusted Capital Account Deficit            12.2
          Advance Distribution                        13.2
          Apogee MBO                                  13.2
          Apogee Notice Date                          14.1(a)
          Apogee Performance Trigger Notice           14.3(a)
          Apogee Performance Trigger Notice Date      14.3(a)
          Apogee Performance Trigger Purchase Date    14.3(c)
          Apogee Repurchase Date                      14.2(c)
          Arbitrators                                 19.15(c)
          ARG Notice Date                             14.2(a)
          Basket Amount                               13.2(a)
          Basket Capital Expenditures                 13.2(a)
          Basket Compliance Certificate               13.2(a)
          Basket Loan                                 13.2(b)
          Beneficial Owner                            Article II
          Bonus Program                               6.15(f)
          Buy-Out Formula Price                       14.1(b)
          Certificate of Formation                    Article I
          Channel Conflict Document                   19.1(a)
          Closing Agreements                          6.15(j)
          Controller                                  7.1
          Director of Material Management             7.1
          Dispute                                     19.15
          Dispute Trigger Notice                      19.15(d)

                                       8
<PAGE>

          Draft Value                                 14.3(e)(vii)
          Federal Arbitration Act                     19.15(c)
          GAAP                                        10.4(a)(i)
          Harmon Retail                               10.4(c)
          Human Resources Director                    7.1
          Indemnitee                                  8.1(a)
          Initial Facility                            6.15(d)
          Majority Member                             14.2
          Minority Member Purchase Date               14.1(c)
          Network                                     14.3(e)(i)
          Orphan Branch                               14.3(e)(iii)
          Other Director                              8.1(a)
          Performance Measurement Period              14.3
          Poor Financial Performance Event            14.3
          PPG Dispute Trigger Notice                  19.15(f)
          PPG Performance Trigger Notice              14.4(a)
          PPG Performance Trigger Notice Date         14.4(a)
          PPG's Glass Business                        14.2
          Public Company                              19.1(b)
          Purchase Offer                              14.3(d)(i)
          Qualified Transferee                        14.3(d)(i)
          Regional Vice Presidents                    7.1
          Regulatory Allocations                      12.3
          Salary Scale                                6.15(f)
          Securities Act                              18.1(a)
          TMP                                         10.7
          Transferee                                  14.3(d)(i)
          Trial Counsel                               6.15A

                                 Article III.
                     Purpose and Character of the Business
                     -------------------------------------

          The purpose and character of the business of the Company shall be to
purchase, market and sell automotive glass parts and related supplies for sale
to wholesalers and retail automotive glass retailers located primarily in the
United States, to undertake commercial business activities that are directly
related to or in support of such business, and to undertake and carry on any
other lawful business, purpose or activity permitted under the Act and approved
by a Member Special Vote.

                                  Article IV.
                                    Members
                                    -------

          Section 4.1.  Place and Time of Meetings.  Meetings of the Members
                        --------------------------
may be held at such place and at such time as may be designated by the Board of
Managers, but only for the purposes as provided for in Section 4.3 or as
otherwise requested by all Members in writing.

                                       9
<PAGE>

In the absence of a designation of place, meetings shall be held at the
Principal Office. In the absence of a designation of time, meetings shall be
held at 10:00 a.m. Any or all Members may participate in any meeting of Members
by any means of conference communication through which all Members may
simultaneously hear each other during such meeting. For the purposes of
establishing a quorum and taking any action at the meeting, Members
participating pursuant to this provision shall be deemed present in person at
the meeting, and the place of the meeting shall be the place of origination of
the conference communication.

          Section 4.2.  No Annual Meetings.  There shall be no requirement for
                        ------------------
the Members to hold, and the Members shall not hold, annual meetings, whether
for the appointment of Managers or for the transaction of any other business as
may otherwise properly come before such a meeting.

          Section 4.3.  Meetings.  Meetings of the Members shall be held only
                        --------
for the purposes set forth in Section 4.8 hereof or as may otherwise hereafter
be required by the Act.  Any action required by the Members under the Act shall
conform as closely as possible to the intent of the Members as reflected by the
specific terms of this Agreement.  Meetings shall be called by the Secretary at
the written demand of (a) a majority of all Managers, (b) the Chair or (c)
Members holding an Equity Percentage of at least 25%.  Such demand shall state
the purpose or purposes of the proposed meeting.  Within ten days after the
Secretary shall receive a proper demand to call a meeting, he or she shall cause
a meeting to be duly called on a business day determined by the Secretary at
least twenty (20) days after, and within sixty (60) days of, the date of receipt
of such request.  Business transacted at any special meeting shall be limited to
the purpose or purposes stated in the demand.

          Section 4.4.  Quorum, Adjourned Meetings.  Members holding an Equity
                        --------------------------
Percentage of at least 80% shall constitute a quorum for the transaction of
business at any meeting of the Members for a purpose set forth in Section 4.8
hereof; with respect to any other meeting of the Members for a different
purpose, if any, that is then required by the Act, Members holding an Equity
Percentage of at least 51%, or such higher percentage as may be required by the
Act, shall constitute a quorum for such meeting.  If a quorum is not present at
a meeting, the Members present and entitled to vote shall adjourn to such day as
they shall agree upon by a vote of the majority in voting interest present and
entitled to vote.  Notice of any adjourned meeting need not be given to any
Member present at such adjourned meeting if the date, time and place thereof are
announced at the meeting at which the adjournment is taken.  At adjourned
meetings at which a quorum is present, any business may be transacted which
might have been transacted at the meeting as originally noticed.  If a quorum is
present, the Members may continue to transact business until adjournment
notwithstanding the withdrawal of enough Members to leave less than a quorum.
If no quorum is present at two (2) consecutive meetings with respect to the same
Member Special Vote matter, the party requesting the meeting may refer the
Member Special Vote matter to a dispute resolution under Section 19.15, as if
such matter had been presented for a vote.

          Section 4.5.  Organization.  At each meeting of the Members, the
                        ------------
Chair or, in his or her absence, the Person chosen to act as Chair by a majority
in voting interest of the

                                       10
<PAGE>

Members present and entitled to vote, shall act as Chair; and the Secretary or,
in his or her absence, any person whom the Chair of the meeting shall appoint,
shall act as Secretary of the meeting.

          Section 4.6.  Order of Business.  The order of business at each
                        -----------------
meeting of the Members shall be determined by the Chair of the meeting, but such
order of business may be changed by the vote of 100% in voting interest of the
Members present and entitled to vote.

          Section 4.7.  Voting.  Subject to any different voting rights that
                        ------
may be established for any Members after the date hereof, each Member entitled
to vote at a meeting of Members or entitled to express consent in writing to
action without a meeting shall have voting rights equal to the Equity Percentage
held by such Member on the record date set for such meeting (or, if no record
date has been set, the date of the meeting), determined on the books of the
Company.  All questions at a meeting of the Members shall be decided by the vote
of the outstanding Equity Percentages of all Members required by Section 4.8
hereof or the Act, as applicable.

          Section 4.8.  Certain Actions.  The following actions shall require
                        ---------------
the approval or authorization of a Member Special Vote:

          (a) The approval of any Reorganization;

          (b) The authorization or issuance of any equity interests of any kind
in the Company in addition to the equity interests held by Apogee and PPG on the
date hereof, pursuant to Section 5.2 hereof;

          (c) The amendment of any Article, Section or term of this Agreement or
of the Certificate of Formation, pursuant to Article XVI hereof;

          (d) The authorization of the Company to undertake activities in
addition to those specifically identified in Article III hereof;

          (e) The authorization of admission of new Members, and any changes in
rights of Members related to the Equity Percentages, pursuant to Section 5.1
hereof;

          (f) Any change in the size of the Board of Managers, pursuant to
Section 6.3 hereof;

          (g) The authorization of additional Capital Contributions of Members,
pursuant to Section 11.2 hereof;

          (h) The authorization of any federal or state bankruptcy or similar
proceeding, pursuant to Article XVII hereof;

                                       11
<PAGE>

          (i) Any modification to the Channel Conflict procedures, as
contemplated by Section 19.1 (a) hereof and the CCD;

          (j) The acquisition by the Company of assets in excess of 20% of the
book value of the Company; and

          (k) The disposition of assets by the Company in excess of 20% of the
book value of the Company.

          Section 4.9.   Notices of Meetings.  Every Member shall furnish the
                         -------------------
Secretary with a post office address at which notices of meetings and requests
for consents to action without a meeting and all other communications may be
mailed to him, her or it.  A written notice of each meeting of Members shall be
given not less than twenty (20) nor more than sixty (60) days before the date of
such meeting to each Member by delivering such notice to him, her or it
personally or depositing the same in the United States mail, postage prepaid,
directed to him, her or it at the post office address shown upon the records of
the Company.  Service of notice is complete upon mailing.  Personal delivery to
any officer of a corporation or association or to any member of a partnership,
in each case, previously designated by such Member to receive such notices, is
delivery to such corporation, association or partnership.  Every notice of a
meeting of Members shall state the place, date and hour of the meeting and the
purpose or purposes for which the meeting is called.

          Section 4.10.  Proxies.  Each Member entitled to vote at a meeting
                         -------
of Members or consent to action without a meeting may authorize another Person
or Persons to act for him, her or it by proxy by an instrument executed in
writing and filed with the Secretary.  A Member may submit such instrument by
telegram, cablegram, facsimile or other means of electronic transmission setting
forth or submitted with information sufficient to determine that such Member
authorized such transmission.  Any copy, facsimile, telecommunication or other
reproduction of the original of either the writing or transmission may be used
in lieu of the original, provided, that it is a complete and legible
                         --------
reproduction of the entire original.  If any such instrument designates two (2)
or more Persons to act as proxies, any proxy may exercise all of the powers
conferred by such written instrument unless the instrument shall otherwise
provide.  No proxy shall be valid for more than one (1) year from the date of
its execution.  Subject to the above, any proxy may be revoked if an instrument
revoking such proxy or a proxy bearing a later date is filed with the Secretary.

          Section 4.11.  Waiver of Notice.  Notice of any meeting may be
                         ----------------
waived either before, at or after such meeting in writing signed by the Member
entitled to the notice.  Attendance by a Member at a meeting shall constitute a
waiver of notice of such meeting, unless the Member objects at the beginning of
the meeting to the transaction of business because the meeting is not lawfully
called or convened, or objects before a vote on an item of business because the
item may not lawfully be considered at that meeting and does not participate in
the consideration of the item at that meeting.

                                       12
<PAGE>

          Section 4.12.  Written Action.  Any action that may be taken at a
                         --------------
meeting of the Members may be taken without a meeting if done in writing and
signed by all of the Members.

                                   Article V.
              New Members; Additional Equity Interests; Securities
              ----------------------------------------------------

          Section 5.1.  Admission of New Members.  The Members, by a Member
                        ------------------------
Special Vote, may from time to time admit additional Members to the Company.
All Members shall be required to have an interest in the Company represented by
its Equity Percentage.  Unless otherwise authorized by the Members by a Member
Special Vote in accordance with this Article V, all Members shall hold equity
interests in the Company that are entitled to vote and otherwise have equal
rights and preferences, in accordance with the percentage of Equity Percentage
so held, in all matters, and the Profits or Losses, subject to Regulatory
Allocations, and distributions of cash or other assets, of the Company shall be
allocated among the Members of the Company in proportion to the Equity
Percentages held by the Members.  The Members, by vote of not less than a Member
Special Vote, may fix (i) the relative rights and preferences of different
classes and series of equity interests in the Company and (ii) may authorize the
issuance of securities convertible into, or exchangeable for, and options,
warrants and rights to purchase, such equity interests.

          Section 5.2.  Issuance of Additional Equity Interests.  The Members,
                        ---------------------------------------
by a Member Special Vote, may issue additional equity interests in the Company
from time to time to existing or new Members.  Such equity interests may be
issued for any consideration, including, without limitation, cash or other
property, tangible or intangible, received or to be received by the Company or
services rendered or to be rendered to the Company.  At the time of
authorization of the issuance of additional equity interests, the Members shall
state, by resolution, their determination of the fair value to the Company in
monetary terms of any consideration other than cash for which such equity
interests are to be issued.

                                  Article VI.
                  Management and Operation of Company Business
                  --------------------------------------------

          Section 6.1.  Authority of the Members.  Except as otherwise
                        ------------------------
expressly provided herein, no Member shall have any authority to act for, or to
assume any obligations or responsibility on behalf of, or bind any other Member
or the Company.  Each of the Members represents, warrants and agrees that it
shall disclose in writing to all third parties with whom such Member is in
contact concerning the affairs or the business of the Company that such Member
does not have any authority to act for, or to assume any obligations or
responsibilities on behalf of, the Company unless expressly authorized by the
Board of Managers.

          Section 6.2.  Board of Managers.  The business and affairs of the
                        -----------------
Company shall be managed by or under the authority of the Board of Managers,
except as otherwise required by the Act or this Agreement.

                                       13
<PAGE>

          Section 6.3.  Number, Qualification; Term of Office; Vote.  The
                        -------------------------------------------
Board of Managers shall initially consist of five (5) members, of which two (2)
shall be designated by Apogee and three (3) shall be designated by PPG (each a
"Manager").  The size of the Board of Managers may be changed only by a Member
Special Vote and the number of Managers designated by a Member shall be in the
same proportion as such Member's initial number of designees bears to the
initial size of the Board of Managers until such time as a Member's Equity
Percentage (determined as of any fiscal year-end of the Company) represents less
than 50% of the initial Equity Percentage of such Member; when such event
occurs, the size of the Board of Managers and number of designees assignable to
each Member shall be adjusted to reflect, as accurately as reasonable under the
circumstances, such Member's then-current Equity Percentage.  Subject to the
preceding sentence, each of Apogee and PPG (and any new, additional Member which
is entitled to designate a Manager) may designate a replacement representative
at any time and from time to time for any one or more of the Managers it or they
have designated by giving written notice of such replacement to the Company and
the other Managers, which replacement shall be effective upon the giving of such
notice.  Each Manager shall have one vote with respect to all matters to come
before the Board of Managers.

          Section 6.4.  Initial Board.  Upon the Closing, the initial Board of
                        -------------
Managers shall be comprised of two (2) Apogee designees and three (3) PPG
designees, to be designated in writing by each designating party to the other
party prior to the Closing.

          Section 6.5.  Place of Meetings.  Meetings of the Board of Managers
                        -----------------
shall be held at the Principal Office of the Company or at such other place as
may be agreed by the members of such Board from time to time.

          Section 6.6.  Meetings.  A meeting of the Board of Managers may be
                        --------
called for any purpose or purposes at any time by the Chair or by any Member who
holds an Equity Percentage of at least 25% and who shall demand such meeting by
written notice given to the Chair specifying the purposes of such meeting.
There shall be at least one regular meeting of the Board of Managers in each
Fiscal Year.

          Section 6.7.  Meetings Held Upon Member Demand.  Within ten (10)
                        --------------------------------
business days after the Chair receives a valid demand for a meeting of the Board
of Managers from a Member, it shall be the duty of the Chair to cause a special
or regular meeting of the Board of Managers, as the case may be, to be duly
called and held on notice no less than ten business days and no later than
twenty (20) business days after receipt of such demand.  If the Chair fails to
cause such a meeting to be called and held as required by this Section 6.7, the
Member or Members making the demand may call the meeting by giving notice as
provided in Section 6.9 at the expense of the Company.

          Section 6.8.  Adjournments.  Any meeting of the Board of Managers
                        ------------
may be adjourned from time to time to another date, time and place.  If any
meeting of the Board of Managers is so adjourned, no notice as to such adjourned
meeting need be given to the Managers present if the date, time and place at
which the meeting will be reconvened are announced at the time of adjournment.

                                       14
<PAGE>

          Section 6.9.  Notice of Meetings.  Unless otherwise required by law,
                        ------------------
written notice of each meeting of the Board of Managers, stating the date, time
and place and, in the case of a special meeting, the purpose or purposes, shall
be given at least ten (10) days and not more than twenty (20) business days
prior to the meeting to every member of the Board of Managers.  A Manager may
waive notice of the date, time, place and purpose or purposes of a meeting of
the Board of Managers.  A waiver of notice is effective whether given before, at
or after the meeting, and whether given in writing, orally or by attendance.
Attendance by a Manager at a meeting is a waiver of notice of that meeting,
unless the Manager objects at the beginning of the meeting to the transaction of
business because the meeting is not lawfully called or convened, or objects
before a vote on an item of business because the item may not lawfully be
considered at that meeting and does not participate in the consideration of the
item at that meeting.

          Section 6.10.  Quorum.  A majority of the Managers shall constitute
                         ------
a quorum for the transaction of business at each meeting of the Board of
Managers.

          Section 6.11.  Absent Members.  A Manager may give advance written
                         --------------
consent or opposition to a proposal to be acted on at a meeting of the Board of
Managers.  If such Manager is not present at the meeting, such consent or
opposition to a proposal does not constitute presence for purposes of
determining the existence of a quorum, but such consent or opposition shall be
counted as a vote in favor of or against the proposal and shall be entered in
the minutes or other record of action at the meeting, if the proposal acted on
at the meeting is substantially the same or has substantially the same effect as
the proposal to which the Manager has consented or objected.

          Section 6.12.  Conference Communications.  Any or all of the
                         -------------------------
Managers may participate in any meeting of the Board of Managers, or of any duly
constituted committee thereof, by any means of communication through which such
members may simultaneously hear each other during such meeting.  For the
purposes of establishing a quorum and taking any action at the meeting, Managers
participating pursuant to this Section 6.12 shall be deemed present in person at
the meeting; and the place of the meeting shall be the place of origination of
the conference telephone conversation or other comparable communication
technique.

          Section 6.13.  Removal.  Any Manager may be removed from office at
                         -------
any time, with or without cause, but only by the Member that designated such
Manager.

          Section 6.14.  Acts of Managers.  Except as otherwise provided in
                         ----------------
Section 6.15 hereof, the Board of Managers shall take action by the affirmative
vote of a majority of the total number of Managers present and eligible to vote
at a meeting of Managers duly noticed and held and at which a quorum of Managers
is present, and any such act shall be deemed to be the action of the Board of
Managers for all purposes of this Agreement and the Act.

          Section 6.15.  Certain Actions.  The following actions shall require
                         ---------------
the approval or authorization of a Board Supermajority:

                                       15
<PAGE>

          (a)  Transaction of any business outside the scope specified in
Article III;

          (b)  The approval of the Operating Budget (including the Capital
Expenditures Budget) for the Company's first year of operations (to be agreed by
the Members prior to the Closing and included in the records of the Company);
thereafter the approval of each Operating Budget that reflects a projected level
of EBIT that is 15% or more below the actual EBIT results for the immediately
prior Fiscal Year;

          (c)  The approval of the Strategic Plan for the Company's first year
of operations (to be agreed by the Members prior to the Closing and included in
the records of the Company); thereafter the approval of each Strategic Plan that
contemplates a 20% or more deviation in the Company's Strategy Value from the
Strategy Value set forth in the most recent Strategic Plan previously approved
by the Board in accordance with Article VI of this Agreement and, if applicable,
this Section 6.15;

          (d)  Except as provided for in Section 13.2, the entering into of any
revolving credit agreement or other agreement for borrowed money other than (i)
the initial credit facility agreed to by the Members as of the Closing (the
"Initial Facility") or (ii) amendments or replacements to the Initial Facility
that (A) do not contain terms (other than interest rate terms) less favorable to
the Company than those contained in the Initial Facility; the parties
acknowledging, however, that any such interest rate provisions shall be on terms
that are then currently available from independent third party lenders for a
borrower with a credit rating equivalent to that of the Company at the time at
which the Company is seeking the proposed amendment or replacement facility, (B)
do not result in the Company's debt-to-capitalization ratio exceeding 25%, and
(C) would not restrict in any manner or otherwise conflict with the ability of
the Company to make the quarterly distributions to the Members as contemplated
by the initial terms of Section 13.1 hereof;

          (e)  The granting of any lien, charge or encumbrance upon any of the
Company's assets except as granted in the ordinary course of business of the
Company;

          (f)  The approval of the compensation terms (including salary and
bonus) for officers of the Company and approval of the initial incentive
compensation program for officers of the Company (the "Bonus Program") and the
base salary rate for officers of the Company (the "Salary Scale"), but only if
such terms exceed the then applicable Hay Group parameters in effect at the time
for PPG employees within an applicable grade level;

          (g)  The approval of the initial set of benefit plans or arrangements
to be offered by the Company, any material changes to any such plan or
arrangement, and new benefit plans or arrangements proposed to be adopted
thereafter, excepting the Defined Benefit Plans of the Company;

          (h)  The initial appointment (or any change thereto) of the certified
public accountants for the Company; provided that, so long as the Company has
                                    --------
retained the independent auditors of either PPG or Apogee, no Board
Supermajority vote shall be required;

                                       16
<PAGE>

          (i)  The initial approval (or any change thereto) of the principal
outside corporate counsel for the Company; provided that, so long as PPG's
                                           --------
Equity Percentage exceeds 50%, the Company may use the services of PPG's
internal corporate counsel to handle routine, day-to-day matters as to which the
Members' interests are aligned, and the Company shall reimburse PPG for the
reasonable costs of such services pursuant to a services agreement entered into
prior to the Closing;

          (j)  Any amendment of any definitive agreement entered into on or
prior to the Closing to which the Company and either Member (or affiliate of
such Member) are parties (collectively, the "Closing Agreements");

          (k)  The making of any investments in equity or debt securities of any
Person other than in cash and cash equivalents for cash management purposes or
otherwise in the ordinary course of business of the Company;

          (l)  The entering into of any transactions with Affiliates of either
of the Members, other than those transactions contemplated by this Agreement and
the Closing Agreements;

          (m)  The approval of a change to any of the Company's financial,
accounting, environmental, health and safety, human resources or other policies
(all of which, initially, shall be the same as the comparable policies of PPG
applied to controlled subsidiaries of PPG) or any tax elections of the Company
to the extent that such change would result in a material cost to the Company or
either of the Members and is not compelled by changes to the comparable policies
of PPG; provided that, if PPG's Equity Percentage is less than 50%, then the
        --------
Company shall not be required to adopt or use PPG's comparable policies and a
Board Supermajority approval shall be required for the approval of any change in
such policies;

          (n)  Except as provided for in Section 13.2, the making of any
distributions to the Members in an amount less than or greater than the
distributions determined pursuant to Section 13.1 hereof;

          (o)  The authorization of the creation and/or delegation of authority
and responsibility of any Board committee, or any modification thereto, pursuant
to Section 6.18 hereof;

          (p)  The authorization of the designation or elimination of new
officer positions for the Company, pursuant to Sections 7.1 and 7.2 hereof;

          (q)  The election of the President, the Chief Financial Officer and
the Director of Human Resources, at such time as PPG's Equity Percentage is less
than 50%, pursuant to Section 7.2 hereof.

                                       17
<PAGE>

          (r)  The authorization of certain elections with respect to tax
allocations; pursuant to Section 12.5 hereof; and

          (s)  The authorization of changes that affect allocation of Profits
and Losses to Members, pursuant to Section 12.6 hereof.

For purposes of this Agreement, the term "ordinary course of business" shall
mean the ordinary course of business of the Company as conducted in accordance
with the specific purpose set forth in Article III (as such Article may be
amended from time to time by Special Member Vote) consistent with past practice.
To the extent that the Company, from time to time, has any Subsidiaries,
reference to the Company in this Section 6.15 shall be deemed to refer to the
Company and its Subsidiaries.

          Section 6.15A.  Litigation Matters.  All potential or actual
                          ------------------
litigation matters (e.g., legal claims, disputes or lawsuits) involving the
Company that would result in a financial liability to the Company not covered by
insurance in excess of $250,000, or that may otherwise have a material
detrimental effect on the reputation of the Company shall be (i) referred to
outside, reputable and experienced litigation counsel ("Trial Counsel") and (ii)
presented for discussion to the Board of Managers, and no such matter shall be
settled or otherwise finally resolved without the approval of the Board of
Managers.  The Board of Managers shall, in good faith, seek to resolve all such
matters by Board Supermajority but, if unable to do so, shall be entitled to
resolve by a majority vote pursuant to Section 6.14 hereof, so long as the Board
of Managers acting by majority vote shall have voted to adopt the recommendation
of Trial Counsel for such matter.  If any such matter is resolved without a
Board Supermajority or without the Board of Directors having adopted the
recommendation of the Trial Counsel, and if a Minority Member represented on the
Board does not agree with such resolution, such Member shall be entitled to
notify the other Member or Members of its disagreement and such disagreement
shall trigger the dispute resolution mechanisms set forth in Section 19.15
hereof.

          Section 6.15B.  Operating Policies.  The Members agree that, so long
                          ------------------
as PPG's Equity Percentage exceeds 50%, the Company shall adopt the financial,
accounting, environmental, health and safety, human resources and other, similar
policies of PPG applicable to controlled subsidiaries of PPG and any
modifications to such policies required to be made, from time to time
thereafter, by PPG.  In the event that any policy or modification would impose a
material cost to any Member, and any Member objects thereto, such Member shall
be entitled to notify the other Member or Members of its disagreement and such
disagreement shall trigger the dispute resolution mechanisms set forth in
Section 19.15 hereof.

          Section 6.15C.  Budget Preparation; Approvals and Delegation of
                          -----------------------------------------------
Authority.    The Members agree that, so long as PPG's Equity Percentage exceeds
---------
50%, the Company shall adopt the budget preparation, approval of Capital
Expenditures, approval of contracts, delegation of authority and similar
policies of PPG as in effect from time to time.  In the event that the Company
does not follow such PPG policies, any Member shall be entitled to notify the
other Member or Members of its disagreement and such disagreement shall trigger
dispute resolution mechanisms set forth in Section 19.15 hereof.

                                       18
<PAGE>

          Section 6.16.  Written Action.  Any action which might be taken at a
                         --------------
meeting of the Board of Managers, or any duly constituted committee thereof, may
be taken without a meeting if done in writing and signed by a number of the
members of the Board of Managers, or committee members, whose approval would be
sufficient to approve the action at a meeting at which all of the members of the
Board of Managers (or such committee) were present; provided, that no such
                                                    --------
written action shall be valid unless signed by at least one Manager designated
by Apogee and one Manager designated by PPG.

          Section 6.17.  Proxies.  A Manager may cast or authorize the casting
                         -------
of a vote by filing a written appointment of a proxy with the Chair at or before
the meeting at which the appointment is to be effective. The Manager may sign or
authorize the written appointment by telegram, cablegram, facsimile or other
means of electronic transmission setting forth or submitted with information
sufficient to determine that the Manager authorized such transmission. Any copy,
facsimile, telecommunication or other reproduction of the original of either the
writing or transmission may be used in lieu of the original, provided, that it
                                                             --------
is a complete and legible reproduction of the entire original. Subject to the
above, any proxy may be revoked if an instrument revoking such proxy or a proxy
bearing a later date is filed by the Manager who originally delivered the proxy
with the Chair. For the avoidance of doubt, the Members acknowledge that any
Manager appointed by a Member who will not be attending a meeting of the Board
of Managers shall be entitled to designate another Person (who shall be a
natural Person) to act as a substitute Manager (with all powers of the absent
Manager) on behalf of the absent, appointed Manager for such meeting.

          Section 6.18.  Committees.
                         ----------

          (a)  A resolution approved by a Board Supermajority may establish
committees having the authority of the Board of Managers in the management of
the business of the Company to the extent provided in the resolution.  A
committee shall consist of one or more Persons, who need not be members of the
Board of Managers.  Committees are subject to the direction and control of the
Board of Managers, and vacancies in the membership thereof shall be filled by, a
resolution approved by a Board Supermajority.

          (b)  A quorum for the transaction of business of a committee shall be
the number provided for in the resolution approved by a Board Supermajority
creating such committee.

          Section 6.19.  Compensation.  Members of the Board of Managers shall
                         ------------
not be compensated by the Company for serving in such capacity.  The Company
shall bear the travel and out-of-pocket expenses, if any, incurred by each
Member's respective representatives in attending meetings of the Board of
Managers.

                                       19
<PAGE>

                                  Article VII.
                                    Officers
                                    --------

          Section 7.1.  Number.  The officers of the Company, all of whom
                        ------
shall be natural Persons, shall consist of a Chair, a President, a Chief
Financial Officer, a Secretary, a Controller, and four (4) Regional Vice
Presidents (the "Named Officers"), and any other officers and agents that may be
designated from time to time by a vote of a Board Supermajority.  The Members
also expect the Company to hire a Human Resources Director and a Director of
Material Management, neither of whom shall be deemed "Named Officers."  Any
natural Person may hold two (2) or more offices.

          Section 7.2.  Election, Term of Office and Qualifications.  At each
                        -------------------------------------------
annual meeting of the Board of Managers, all officers shall be elected.  Such
officers shall hold office until the next annual meeting of the Board of
Managers or until their successors are elected and qualified, or until such
office is eliminated by amendment of this Agreement, in the case of the Named
Officers, or a vote of a Board Supermajority, in the case of officers other than
Named Officers.  An officer who is a Manager shall hold office until the
election and qualification of his or her successor even though he or she may
cease to be a Manager.  So long as PPG's Equity Percentage exceeds 50%, the
President, the Chief Financial Officer and the Director of Human Resources shall
be elected by the Managers designated by PPG.  At such time as PPG no longer
holds such Equity Percentage, such officers shall be elected by a Board
Supermajority Vote.  The Controller shall be elected by the Managers designated
by Apogee.  During the first five (5) years of the Company's operations, two (2)
Regional Vice Presidents shall be elected by the Managers designated by PPG, and
two (2) Regional Vice Presidents and the Director of Material Management shall
be elected by the Managers designated by Apogee; thereafter, such officers shall
be elected by a majority of the Board of Managers.  Notwithstanding the
foregoing, the initial Members agree that one of PPG's two (2) elected Regional
Vice President, Glenn N. Hartman, may be designated by PPG for a period ending
in November 2005, so long as its initial designee for that position is still
employed in that position for such period.

          Section 7.3.  Removal and Vacancies.  Any officer, other than the
                        ---------------------
Controller, may be removed from office with or without cause upon a vote of a
majority of the Board of Managers; the Controller may be removed from office
with or without cause upon a vote of a majority of the Board of Managers
provided that (i) the Board of Managers shall provide the Controller and Apogee
with written notice specifying the reasons for the Board's decision and
reasonable opportunity to cure the issues or problems specified in the notice
(unless the reason provided by the Board of Managers is a finding by the Board
of Managers that cause exists to terminate the Controller such that providing an
opportunity to cure would cause harm to the Company) and (ii) if the problem
asserted by the Board of Managers is not cured to the satisfaction of the Board
of Managers (or is not curable on account of a finding of cause) and a majority
of the Board of Managers continues to desire to terminate the Controller, the
Board of Managers shall convene a special meeting at which the Controller and
his or her counsel and counsel for Apogee will be afforded an opportunity to
address the entire Board with respect to any issues or questions they may have
regarding the reasons and basis for the termination.  Such removal shall be
without prejudice to the contract rights of the person so removed.  A vacancy
among the Named Officers, the other officers specifically identified in Section
7.2, and all other Company officers, if any, due to death, resignation, removal
or otherwise shall be filled for the

                                       20
<PAGE>

unexpired term by the Board of Managers in accordance with the provisions of
Section 7.2 hereof, unless such office is eliminated.

          Section 7.4.  Chair.  The Chair shall preside at all meetings of the
                        -----
Members and Managers and shall have such other duties as may be prescribed, from
time to time, by the Board of Managers.  The Chair shall be a Manager and shall
be elected by the Board of Managers.

          Section 7.5.  President.
                        ---------

          (a)     Day-to-Day Operations.  The Company shall be managed by a
                  ---------------------
President.  The Board of Managers delegates to the President the authority to
oversee and supervise the Company's business.  Except as otherwise provided in
this Agreement, the President shall be authorized to determine all questions
relating to the day-to-day conduct, operation and management of the business of
the Company.  The President shall be responsible to the Board of Managers.

          (b)     General.  The President shall be entitled to delegate such
                  -------
part of his or her duties as he or she may deem reasonable or necessary in the
conduct of the business of the Company to one or more employees of the Company,
who shall each have such duties and authority as shall be determined from time
to time by the President or as may be set forth in any agreement between such
employee and the Company.

          (c) Identity and Compensation.  So long as PPG's Equity Percentage
              -------------------------
exceeds 50%, the President shall be an employee of PPG.  The President shall
receive such compensation as may be determined from time to time by the Board of
Managers in accordance with Article VI of this Agreement and, if applicable,
Section 6.15 hereof.

          Section 7.6.  Chief Financial Officer.  So long as PPG's Equity
                        -----------------------
Percentage is in excess of 50%, the Chief Financial Officer shall be an employee
of PPG.  The Chief Financial Officer shall keep or cause to be kept accurate
accounts of all moneys of the Company received or disbursed.  He or she shall
deposit or cause to be deposited all moneys, drafts and checks in the name of
and to the credit of the Company in such banks and depositories as the Board of
Managers shall from time to time designate.  He or she shall have power to
endorse or cause to be endorsed for deposit or collection all notes, checks and
drafts received by the Company.  He or she shall disburse or cause to be
disbursed the funds of the Company as ordered by the President, making proper
vouchers therefor.  He or she shall render to the Board of Managers or any
Member whenever required or requested an account of all his or her transactions
as Chief Financial Officer and of the financial condition of the Company and
shall perform such other duties as may from time to time be prescribed by the
Board of Managers.

          Section 7.7.  Secretary.  The Secretary shall be secretary of and
                        ---------
shall attend all meetings of the Members and Board of Managers and shall record
all proceedings of such meetings in the minute book of the Company.  He or she
shall give proper notice of meetings of Members and the Board of Managers.  He
or she shall perform such other duties as may from time to time be prescribed by
the Board of Managers.

                                       21
<PAGE>

          Section 7.8.   Director of Human Resources.  So long as PPG's Equity
                         ---------------------------
Percentage exceeds 50%, the Director of Human Resources shall be an employee of
PPG.  The Director of Human Resources shall report to the President and shall be
primarily responsible for managing human resources functional areas of the
Company, including employment/staffing below the Named Officers or other Company
officers controlled by this Agreement, benefits administration, compensation
administration, labor relations, organizational development, performance
management, succession planning and training.  He or she shall perform such
other duties as may from time to time be prescribed by the Board of Managers.

          Section 7.9.   Controller.  The Controller shall be an employee of
                         ----------
Apogee.  The Controller shall report to the Chief Financial Officer and the
Managers designated by Apogee and his or her duties shall include (i) such
portion of the duties set forth in Section 7.6 hereof as may be delegated to him
or her by the President or Chief Financial Officer and (ii) such additional
duties as may from time to time be prescribed by the Managers designated by
Apogee.  He or she shall also perform such other duties as may from time to time
be prescribed by the Board of Managers.

          Section 7.10.  Regional Vice Presidents.  Subject to the designation
                         ------------------------
rights set forth in Section 7.2 hereof, during the first five (5) years of
operations, a Regional Vice President need not be an employee of PPG or Apogee.
A Regional Vice President shall be responsible for the general management of a
designated geographic region of the Company's business as a profit center,
including direct management to support and execute the Company's long-term
Strategic Plan and short-term operating plan.  He or she shall perform such
other duties as may from time to time be prescribed by the Board of Managers.

          Section 7.11.  Duties of Other Officers.  The duties of such other
                         ------------------------
officers and agents as the Board of Managers may designate shall be set forth in
the resolution creating such office or agency or by subsequent resolution.

          Section 7.12.  Compensation.  The Named Officers of the Company
                         ------------
shall receive such compensation for their services as may be determined from
time to time by the Board of Managers in accordance with Article VI of this
Agreement and, if applicable, Section 6.15 hereof, and the compensation of all
other employees of the Company shall be determined by the President.

                                 Article VIII.
                                Indemnification
                                ---------------

          Section 8.1.   Indemnification.
                         ---------------

          (a) To the fullest extent permitted by law, each Manager, each Named
Officer and the Director of Human Resources and the Director of Materials
Management (both, an "Other Director") (all of the foregoing, individually, an
"Indemnitee") shall be indemnified, held harmless and defended by the Company
from and against any and all losses, claims, damages,

                                       22
<PAGE>

liabilities, whether joint or several, expenses (including legal fees and
expenses), judgments, fines and other amounts paid in settlement, incurred or
suffered by such Indemnitee, as a party or otherwise, in connection with any
threatened, pending or completed claim, demand, action, suit or proceeding,
whether civil, criminal, administrative or investigative, and whether formal or
informal, arising out of or in connection with the business or the operation of
the Company or by reason of the Indemnitee's status as a Manager, Named Officer
or Other Director, regardless of whether the Indemnitee continues to be a
Manager, Named Officer or Other Director of the Company at the time any such
loss, claim, damage, liability or other expense is paid or incurred if (i) the
Indemnitee acted in good faith and in a manner he or she reasonably believed to
be in the best interests of the Company and, with respect to any criminal
proceeding, had no reasonable cause to believe that his or her conduct was
unlawful, (ii) the Indemnitee's conduct did not constitute intentional
misconduct or a material breach of the terms of this Agreement, (iii) the
Indemnitee's conduct did not involve a transaction from which the Manager or
Named Officer or Other Director derived an improper personal benefit, and (iv)
the Indemnitee's conduct was not in material violation of any of the published
business conduct policies of the Company then in effect. The termination of any
action, suit or proceeding by judgment, order, settlement or upon a plea of nolo
contendere, or its equivalent, shall not, of itself, create a presumption that
the Indemnitee acted in a manner contrary to the standards specified in clauses
(i), (ii), (iii) or (iv) of this Section 8.1(a).

          (b) To the fullest extent permitted by law, expenses incurred by an
Indemnitee in defending any claim, demand, action, suit or proceeding subject to
this Section 8.1 shall, from time to time, be advanced by the Company prior to
the final disposition of such claim, demand, action, suit or proceeding upon
receipt by the Company of an undertaking by or on behalf of the Indemnitee to
repay such amount unless it is determined that such Indemnitee is entitled to be
indemnified therefor pursuant to this Section 8.1.

          (c) The indemnification provided by this Section 8.1 shall be in
addition to any other rights to which any Indemnitee may be entitled under any
other agreement, pursuant to any vote of the Managers, as a matter of law or
otherwise, and shall inure to the benefit of the heirs, legal representatives,
successors, assigns and administrators of the Indemnities.

          (d) Any indemnification under this Section 8.1 shall be satisfied
solely out of the assets of the Company and no Indemnitee shall have any
recourse against any Member with respect to such indemnification.

          (e) An Indemnitee shall not be denied indemnification in whole or in
part under this Section 8.1 merely because the Indemnitee had an interest in the
transaction with respect to which the indemnification applies, if the
transaction was not otherwise prohibited by the terms of this Agreement and the
conduct of the Indemnitee satisfied the conditions set forth in Section 8.1(a)
hereof.

          (f) The Company may, but shall have no obligation to, purchase and
maintain insurance covering any potential liability of the Indemnitees for any
actions or omissions for which indemnification is permitted hereunder, including
such types of insurance (including

                                       23
<PAGE>

extended coverage liability and casualty and workers' compensation) as would be
customary for any person engaged in a similar business, and may name the
Indemnitees as additional insured parties thereunder.

          Section 8.2.  Indemnification Procedures; Survival.
                        ------------------------------------

          (a) Promptly after receipt by an Indemnitee of notice of the
commencement of any action that may result in a claim for indemnification
pursuant to Section 8.1 hereof, the Indemnitee shall notify the Company in
writing within thirty (30) days thereafter; provided, however, that any omission
                                            --------  -------
so to notify the Company will not relieve it of any liability for
indemnification hereunder as to the particular item for which indemnification
may then be sought (except to the extent that the failure to give notice shall
have been materially prejudicial to the Company) nor from any other liability
that it may have to any Indemnitee.

          (b) An Indemnitee shall have the right to employ separate counsel in
any action as to which indemnification may be sought under any provision of this
Agreement and to participate in the defense thereof, but the fees and expenses
of such counsel shall be at the expense of such Indemnitee unless (i) the
Company has agreed in writing to pay such fees and expenses, (ii) the Company
has failed to assume the defense thereof and employ counsel within a reasonable
period of time after being given the notice required above or (iii) the
Indemnitee shall have been advised by its counsel that representation of such
Indemnitee and other parties by the same counsel would be inappropriate under
applicable standards of professional conduct (whether or not such representation
by the same counsel has been proposed) due to actual or potential differing
interests between them.  It is understood, however, that the Company shall, in
connection with any one such action or separate but substantially similar or
related actions in the same jurisdiction arising out of the same general
allegations or circumstances, be liable for the reasonable fees and expenses of
only one separate firm of attorneys at any time for all such Indemnitees having
actual or potential differing interests with the Company, unless, but only to
the extent, that the Indemnitees have actual or potential differing interests
with each other that would require separate representation under the applicable
and appropriate standards of professional conduct.

          (c) The Company shall not be liable for any settlement of any such
action effected without its written consent, but if settled with such written
consent, or if there is a final judgment against the Indemnitee in any such
action, the Company agrees to indemnify and hold harmless the Indemnitee to the
extent provided above from and against any loss, claim, damage, liability or
expense by reason of such settlement or judgment.

          (d) The indemnification obligations set forth in Section 8.1 hereof
and this Section 8.2 shall survive the termination of this Agreement.

                                       24
<PAGE>

                                  Article IX.
                                   Transfers
                                   ---------

          Section 9.1.  Registration, Transfer and Exchange.
                        -----------------------------------

          (a) The Company shall keep at the Principal Office a register in which
shall be entered the names and addresses of the Members and all Transfers of
Equity Percentages

          (b) Subject to this Article IX, each Transfer of any portion or all of
a Membership Interest shall be registered on the effective date of the Transfer,
exchange or other issuance; provided, however, that no registration of any
                            --------  -------
Transfer not made in compliance with this Article IX, and to the extent
applicable, Article XIV or Section 19.15, shall be made in the register.

          (c) Transfer of any portion or all of a Membership Interest on the
books of the Company may be authorized only by the Member named in the Company
register, the Member's legal representative or the Member's duly authorized
attorney-in-fact.  The Company may treat as the absolute owner of a Membership
Interest the person or persons in whose name the Membership Interest is
registered on the books of the Company.

          Section 9.2.  Restriction on Transfers.  In addition to any
                        ------------------------
restrictions imposed by the federal securities laws and any applicable state
securities or "blue-sky" laws, except for transfers in accordance with Article
XIV or Section 19.15, no Member may Transfer all or any part of its Membership
Interest, whether for consideration or not, and no transferee thereof shall have
any rights in the Company or be or have any rights as a Member with respect to
all or any part of any such Membership Interest attempted to be Transferred, and
any such attempted Transfer of all or any part of a Membership Interest shall be
entirely null and void, unless Members holding 100% of the outstanding
Membership Interest that is held by non-transferring Members consent to the
Transfer and the admission of such transferee as a Member if such Transfer is to
a Person, other than the Company, who is not then a Member; provided, however,
                                                            --------  -------
that a Member may Transfer any portion or all of a Membership Interest held by
such Member to a Permitted Transferee of such Transferring Member without the
consent of the other Members hereto; provided, further, however, that all rights
                                     --------  -------  -------
under this Agreement, other than to receive the economic benefit thereof, with
respect to a portion of a Membership Interest transferred to a Permitted
Transferee shall be retained by the Transferring Member and, in the event of a
Change in Control of a Permitted Transferee, all such Membership Interest shall
be transferred back to the Transferring Member on or prior to the occurrence of
such Change in Control.  In connection with the Closing, Apogee contemplates
that one or more of its Affiliated Group Subsidiaries may become a Member and a
party to this Agreement; in such event, any such Affiliated Group Subsidiary of
Apogee becoming a Member shall have only the rights of a Permitted Transferee
with respect to its Membership Interest as set forth in the immediately
preceding sentence.  In the event of a Transfer of any portion or all of a
Membership Interest in accordance with this Section 9.2, the transferee shall
become a party to this Agreement as a Member and shall have all of the rights
and obligations of the transferring Member hereunder except to the extent
otherwise provided in this Section 9.2.  The appropriate Company records shall
be noted to prevent any Transfers in violation of this Section 9.2.

          Section 9.3.  Transfer by Legal Process.  Upon any involuntary
                        -------------------------
Transfer of all or any portion of the Membership Interest of a Member pursuant
to a levy of execution,

                                       25
<PAGE>

foreclosure of pledge, garnishment, attachment, divorce decree, bankruptcy or
other legal process (or by operation of law resulting from the death,
disability, liquidation, dissolution or winding-up of a Member), such Member
shall cease to be a Member, but any successor to the transferred Membership
Interest shall have no right to become a Member or vote in any Company matters
unless admitted by affirmative vote of a Member or Members who hold 100% of the
Membership Interest other than the Membership Interest so transferred, subject
to the provisions of Section 9.5 hereof. If such successor does not become a
Member, such successor shall be merely an assignee within the meaning of Section
18-702(b) of the Act.

          Section 9.4.  Conditions to Permitted Transfers.  No Transfer
                        ---------------------------------
otherwise permitted by any provisions of this Agreement shall be valid unless
and until the following conditions are satisfied (any of which may be waived by
the Board of Managers in its discretion):

          (a)  The transferor and transferee shall execute and deliver to the
Company such documents and instruments of conveyance as may be necessary or
appropriate in the opinion of counsel to the Company to effect such Transfer and
confirm the agreement of the transferee to be bound by the provisions of this
Agreement; provided, however, that in the case of an involuntary Transfer of any
           --------  -------
portion or all of a Membership Interest by operation of law, the Transfer shall
be confirmed by presentation to the Company of legal evidence of such Transfer,
in form and substance satisfactory to counsel of the Company.

          (b)  Except in the case of an involuntary Transfer of any portion or
all of a Membership Interest by operation of law, where no opinion of counsel is
required, the transferor shall furnish to the Company an opinion of counsel,
which counsel and opinion shall be satisfactory to the Company, to the effect
that:

               (i)    The Transfer will not cause the Company to terminate for
     federal income tax purposes under Section 708 of the Code;

               (ii)   The Transfer is either exempt from all applicable
     registration requirements and such Transfer will not violate any applicable
     federal and state laws regulating the Transfer of securities, or the
     Membership Interest to be transferred is duly and properly registered under
     all applicable federal and state securities laws; and

               (iii)  The Transfer will not cause the Company to be deemed to be
     an "investment company" under the Investment Company Act of 1940.

          (c)  The transferor shall provide written notice to the Members of the
proposed Transfer at least fifteen (15) days prior to the proposed effective
date of the Transfer.

          (d)  The transferor and transferee shall furnish the Company with the
transferee's taxpayer identification number, sufficient information to determine
the transferee's initial tax basis in the Membership Interest transferred and
any other information reasonably necessary to permit the Company to file all
required federal and state tax returns and other

                                       26
<PAGE>

legally required information, statements or returns. The Company shall not be
required to make any distribution otherwise provided for in this Agreement with
respect to any Transferred Membership Interest until it has received such
information.

          (e) The transferee shall reimburse the Company for all costs and
expenses reasonably incurred by the Company in connection with such Transfer
including, without limitation, (i) the fees and expenses of any appraiser
retained by the Company to determine the value of such Membership Interest; and
(ii) all reasonable expenses in connection with admission as a Member,
including, without limitation, legal fees and costs of the preparation,
execution, filing or publishing of any amendment to the Certificate of Formation
or this Agreement.

          Section 9.5.   Resignation.  No Member shall be entitled to resign or
                         -----------
retire from the Company prior to the dissolution and winding up of the Company
pursuant to Article XV hereof without the unanimous consent of the other Members
of the Company.

                                   Article X.
                  Books of Account; Reports and Fiscal Matters
                  --------------------------------------------

          Section 10.1.  Books; Place; Access.  The Chief Financial Officer
                         --------------------
and the Controller shall maintain books of account on behalf of the Company at
the Principal Office or such other place as may be designated by the Board of
Managers.  All Members shall at all reasonable times have access to and the
right to inspect the same.

          Section 10.2.  Annual Strategic Plan.  The Members shall agree on
                         ---------------------
the Company's initial strategic plan, to cover the period ending December 31,
2000, at or prior to the Closing (such strategic plan and subsequent strategic
plans in accordance with this Section 10.2, the "Strategic Plan").  Thereafter,
no less than forty-five (45) days before January 1 of each Fiscal Year of the
Company commencing on or after January 1, 2001, the Company's President, Chief
Financial Officer and Controller shall submit an annual strategic plan for the
ensuing Fiscal Year (which shall also set forth the Company's strategy on a
rolling five (5) year basis) (the "Strategic Plan") for the review and approval
of the Board of Managers in accordance with Article VI of this Agreement and, if
applicable, Section 6.15 hereof.  Each Strategic Plan shall be in such form and
shall contain such information as shall be requested or required by the Board of
Managers.

          Section 10.3.  Operating Budget.  The Members shall agree on the
                         ----------------
initial Operating Budget, for the period ended December 31, 2000, at or prior to
the Closing.  Thereafter, no less than forty-five (45) days before January 1 of
each Fiscal Year of the Company commencing on or after January 1, 2001, the
Company's President, Chief Financial Officer and Controller shall submit a new
annual operating budget ("Operating Budget") for the Company for the ensuing
Fiscal Year for the review and approval of the Board of Managers in accordance
with Article VI of this Agreement and, if applicable, Section 6.15 hereof.  Each
Operating Budget shall be in such form and shall contain such information as
shall be requested or required by the Board of Managers; the Operating Budget
will include the Capital Expenditures Budget.  The Company may incur only the
costs and expenditures, including

                                       27
<PAGE>

Capital Expenditures, set forth in an approved Operating Budget (subject to the
ability to apply line item cost savings, contingency line item amounts, budget
variances, etc., if any, contained in such Operating Budget), without any
further approval of the Board of Managers pursuant to Article VI and, if
applicable, Section 6.15 hereof. Once an Operating Budget (including the Capital
Expenditure Budget) is approved for a Fiscal Year, the Board of Managers shall
not approve an increased Operating Budget (or Capital Expenditure Budget) for
such Fiscal Year except as otherwise expressly contemplated by such previously
approved Operating Budget.

          Section 10.4.  Financial Information.
                         ---------------------

          (a)  The Company shall furnish to each Member:

               (i)       Monthly Statements.  As soon as available, but not
                         ------------------
     later than fifteen (15) days after the end of each monthly accounting
     period, an unaudited, consolidated, internal financial report of the
     Company and its Subsidiaries, which report shall be prepared in accordance
     with generally accepted accounting principles consistently applied ("GAAP")
     (except that such financial statements need not include footnotes and shall
     be subject to normal, year-end audit adjustments), and otherwise be in the
     form provided to the Company's senior management, and which shall include
     the following:

                         (A)  a profit and loss statement for such monthly
          accounting period, together with a cumulative profit and loss
          statement from the first day of the current Fiscal Year to the last
          day of such monthly accounting period;

                         (B)  a balance sheet as at the last day of such monthly
          accounting period;

                         (C)  a cash flow analysis for such monthly accounting
          period on a cumulative basis for the current Fiscal Year to date; and

                         (D)  a comparison between the actual figures for such
          monthly accounting period and the comparable figures for the prior
          year and the amount budgeted for such monthly accounting period, with
          an explanation of any material differences between the actual results
          and the budget for such period.

               (ii)      Quarterly Reports.  As soon as available, but not later
                         -----------------
     than fifteen (15) days after the end of each quarterly accounting period
     (other than the last quarterly period of each Fiscal Year), (A) an
     unaudited consolidated financial report of the Company and its
     Subsidiaries, prepared in accordance with GAAP (except that such financial
     statements need not include footnotes) including, with respect to such
     quarterly accounting period, the statements and comparisons referred to in
     subsection (i)(D) above and a statement of cash flows and statement of
     operations for such quarterly accounting period, and (B) a report by
     management of the Company of the operating and financial highlights of the
     Company and its Subsidiaries for the three (3) prior monthly accounting

                                       28
<PAGE>

     periods, which shall include a comparison between operating and financial
     results and the corresponding plan or budget.

               (iii)     Annual Audit.  As soon as available, but not later than
                         ------------
     seventy-five (75) days after the end of each Fiscal Year of the Company,
     audited consolidated financial statements of the Company and its
     Subsidiaries, which shall include a statement of cash flows and statement
     of operations for such Fiscal Year and a balance sheet as of the last day
     thereof, each prepared in accordance with GAAP (except as set forth in the
     notes thereto), and accompanied by the audit report of a firm of
     independent certified public accountants of recognized national standing
     selected in accordance with Article VI of this Agreement and, if
     applicable, Section 6.15 hereof.  The Company and its Subsidiaries shall
     maintain a system of accounting sufficient to enable its independent
     certified public accountants to render the report referred to in this
     subsection.

               (iv)      Strategic Plan and Operating Budget.  Within thirty
                         -----------------------------------
     (30) days prior to the end of each Fiscal Year a copy of each of the
     Strategic Plan and the Operating Budget.

               (v)       Subsidiaries.  If for any period the Company shall have
                         ------------
     any Subsidiary or Subsidiaries whose accounts are consolidated with those
     of the Company, then in respect of such period the financial statements
     delivered pursuant to the foregoing clauses shall be consolidated (and
     consolidating if normally prepared by the Company) financial statements of
     the Company and all such consolidated Subsidiaries.

               (vi)      GAAP Reporting.  The financial statements and reports
                         --------------
     delivered under this subsection shall fairly present in all material
     respects the financial position, cash flows and results of operations of
     the Company at the dates thereof and for the periods then ended, and shall
     have been prepared in accordance with GAAP, except that, in the case of
                                                 ------
     unaudited financial statements, such statements and reports shall be
     subject to normal year-end audit adjustments and need not include
     footnotes.

               (vii)     Accountants Reports.  Promptly upon becoming available,
                         -------------------
     copies of all reports prepared for or delivered to the management of the
     Company by its outside accountants.

               (viii)    Material Events.  Promptly upon becoming aware of any
                         ---------------
     condition or event that could reasonably be expected to have a material
     adverse affect on the assets, business, financial condition, results of
     operations or property of the Company or any of its Subsidiaries (including
     any litigation, governmental inquiry, or discovery of a significant
     liability), a report summarizing such condition or event and the proposed
     response of the Company or the Subsidiary, as applicable, thereto.

               (ix)      Miscellaneous.  Promptly to all Members, from time to
                         -------------
     time, such other information (in writing, if so requested) regarding the
     assets and properties and

                                       29
<PAGE>

     operations, business affairs and financial condition of the Company or any
     of its Subsidiaries as any Member may reasonably request.

          (b)  Upon the reasonable written request of any Member, the Board of
Managers, subject to such reasonable standards as may be established from time
to time by the Board of Managers, shall promptly deliver to such requesting
Member (or, to the extent so directed, to its agent or attorney) a copy of the
following information, to the extent such is requested in writing:

               (i)       promptly after becoming available, a copy of the
     Company's federal, state and local income or information tax returns for
     the year; and

               (ii)      a copy of this Agreement, as amended, and the
     Certificate of Formation.

          (c)  Inspection Rights.  The Company and its Subsidiaries shall afford
               -----------------
to any Member and its employees, counsel and other authorized representatives,
during normal business hours, access, upon reasonable advance notice, to all of
the books, records and properties of the Company or its Subsidiaries, as
applicable, and to make copies of such records and permit such Persons to
discuss all aspects of the Company or its Subsidiaries, as applicable, with any
officers, employees or accountants of the Company, and the Company and its
Subsidiaries shall provide to any Member responses to all reasonable written
requests from a Member for information relating to the Company, its Subsidiaries
and their respective operations; provided, however, that such investigation and
                                 --------  -------
preparation of responses shall not unreasonably interfere with the operations of
the Company or its Subsidiaries, as applicable; and provided, further, that, so
                                                    --------  -------
long as Apogee controls the business of retail automobile glass repair and
replacement operated through its network of "Harmon Retail" shops, it shall
maintain such procedures as are necessary and appropriate to restrict and
exclude Harmon Retail officers and employees from obtaining access to the
information that Apogee may acquire with respect to the operations of the
Company hereunder.  The Company and its Subsidiaries will instruct its
independent public accountants, if any, to discuss such aspects of the financial
condition of the Company or its Subsidiaries, as applicable, with any such
Member and its representatives as such Member may reasonably request, and to
permit such Member and its representatives to inspect, copy and make extracts
from such financial statements, analyses, work papers and other documents and
information (including electronically stored documents and information) prepared
by such accountants with respect to the Company or its Subsidiaries, as
applicable, as such Member may reasonably request.  All costs and expenses
incurred by such Member and its representatives in connection with exercising
such rights of access shall be borne by such Persons.

          Section 10.5.  Tax Information.  Within ninety (90) days after the
                         ---------------
close of each Fiscal Year, all necessary tax information shall be transmitted to
all Members.  The Company shall supply such other tax information, in a timely
manner, as is reasonably requested by a Member.  Such information may relate to
refund opportunities, estimated payment requirements, IRS or state auditor
requests and the like.

                                       30
<PAGE>

          Section 10.6.  Tax Matters Partner.  In the event that the Members
                         -------------------
elect pursuant to Section 301.6231(a)(1)-IT(a)(4) to apply the TEFRA audit
rules, such election being subject to a Member Special Vote, this Section 10.6
shall apply.  For so long as PPG holds an Equity Percentage in excess of 50%,
PPG shall act as the tax matters partner (the "TMP"), as such term is defined in
Section 6231(a)(7) of the Code, and the TMP is hereby authorized to and shall
represent the Company in connection with all examinations of the Company's
affairs by tax authorities, including resulting administrative and judicial
proceedings.  The Members and the TMP shall use all reasonable efforts to comply
with the responsibilities outlined in the Tax Matters Exhibit and in Sections
6222 through 6231 of the Code (including any Treasury Regulations thereunder and
any successor or amendatory provisions thereto for which a tax matters partner
is designated).

          Section 10.7.  Tax Elections    All tax elections and methods required
                         -------------
or permitted to be made or adopted by the Company under the Code shall require a
Board Supermajority.

                                  Article XI.
                                    Capital
                                    -------

          Section 11.1.  Initial Capital Contributions.  Concurrently with the
                         -----------------------------
Closing, as contemplated by the Contribution Agreement, the Persons signing this
Agreement shall make the Capital Contributions indicated opposite their
respective names on Schedule A and become Members.  In exchange for such Capital
Contributions, the Members shall hold the Equity Percentage set forth opposite
their respective names on Schedule A.

          Section 11.2.  Additional Capital Contributions.  In the event that
                         --------------------------------
the Members, by a Member Special Vote, determine, at any time or from time to
time, that an additional Capital Contribution is necessary for the conduct of
the Company's activities, each of the Members shall promptly make a contribution
to the capital of the Company equal to its share (determined in proportion to
the Equity Percentage held by each Member) of such additional Capital
Contribution.  As additional Capital Contributions are needed for the conduct of
the Company's business, if one Member is unable to or otherwise does not
contribute its share of such Capital Contributions to the Company, the Capital
Contributions advanced by the other Member shall be regarded as a loan in
accordance with Section 11.5 hereof.

          Section 11.3.  Special Capital Contributions.    A Member may make
                         -----------------------------
Special Capital Contributions for the purpose of funding any expenditure by the
Company which is to be charged, either by expense, depreciation or amortization,
solely to the Capital Account of such Member pursuant to Section 12.2 of this
Agreement.  A Special Capital Contribution made pursuant to this Section 11.3
shall be credited to the Capital Account of the contributing Member, but shall
not alter the Equity Percentages of the Members as determined under this
Agreement.  PPG may make Special Capital Contributions solely for the purpose of
funding the Defined Benefit Plans, which Special Contributions shall be applied
by the Company solely for that purpose.

                                       31
<PAGE>

          Section 11.4.  No Right to Return of Contribution.  Except as set
                         ----------------------------------
forth in Section 11.9, no Member shall have the right to the withdrawal or to
the return of its Capital Contribution, except upon the dissolution and
liquidation of the Company pursuant to Article XV.

          Section 11.5.  Loans to the Company; No Interest on Capital.  Except
                         --------------------------------------------
for (i) the Initial Credit Facility or replacements or amendments thereto in
accordance with Article VI, and, if applicable, Section 6.15 hereof, and (ii)
Basket Loans made pursuant to Section 13.2 hereof (if made by the Majority
Member), in the amounts, and at the times, required thereby without Board
action, the Members may, but are not obligated to, make loans to the Company
from time to time, as authorized by a Board Supermajority.  Any loans from a
Member shall not be treated as Capital Contributions to the Company for any
purpose hereunder nor entitle such Member to any change in its Equity
Percentage, but the Company shall be obligated to such Member for the amount of
any such loans pursuant to the terms thereof, as the same are determined by a
Board Supermajority and such Member.  Interest with respect to the outstanding
amount of any loans made by a Member to the Company (other than Basket Loans, if
made by the Majority Member, which shall be governed by Section 13.2 hereof)
shall accrue and be payable at such times and at such rate as shall be
determined by a Board Supermajority and such Member.  All scheduled principal
and interest payments with respect to any loans from a Member to the Company
pursuant to this Section 11.5 (other than Basket Loans, if made by the Majority
Member, which shall be governed by Section 13.2 hereof) shall be repaid prior to
any distributions to any Members pursuant to Sections 13.1, 13.3 or 15.3(d)
hereof.  No interest shall be paid on any Capital Contribution to the Company or
on any balance in any Capital Account.

          Section 11.6.  Creditor's Interest in the Company.  No creditor who
                         ----------------------------------
makes a loan to the Company shall have or acquire at any time as a result of
making the loan any direct or indirect interest in the profits, capital or
property of the Company, other than such interest as may be accorded to a
secured creditor.  Notwithstanding the foregoing, this provision shall not
prohibit in any manner whatsoever a secured creditor from participating in the
profits of operation or gross or net sales of the Company or in the gain on sale
or refinancing of the Company, all as may be provided in its loan or security
agreements.

          Section 11.7.  Liability of Members.  Except as otherwise provided
                         --------------------
in the Act, no Member, as such, shall have any personal liability whatsoever to
the Company, any of the other Members or any of the creditors of the Company for
the debts, liabilities, contracts or other obligations of the Company or any of
the Company's losses beyond, with respect to a Member, such Member's Capital
Contribution and, solely to the extent and for the period required by applicable
law, the amount of such Member's Capital Contribution which is returned to it.
Each Membership Interest shall be fully paid and, except as set forth in Section
11.4 hereof, not subject to assessment for additional Capital Contributions.  No
Member shall be required to lend any funds to the Company as a condition to
admission or continued membership of such Member in the Company.  It is the
intent of the Members that (i) no distribution to any Member (other than a
distribution upon the dissolution and liquidation of the Company) shall be
deemed a withdrawal of capital, even if such distribution represents, for
federal income tax purposes or otherwise (in full or in part), a distribution of
depreciation or any other non-cash item accounted

                                       32
<PAGE>

for as a loss or deduction from or offset to the Company's income, and (ii) no
Member shall be obligated to pay any such amount to or for the account of the
Company or any creditor of the Company. However, if any court of competent
jurisdiction holds that, notwithstanding the provisions of this Agreement, any
distribution made by the Company to a Member constitutes a withdrawal of
capital, any obligation under applicable law to return the same or any portion
thereof to or for the account of the Company or its creditors shall be the
obligation of such Member.

          Section 11.8.  Capital Accounts.  A separate capital account
                         ----------------
("Capital Account") shall be maintained by the Company for each Member as
described in the Tax Matters Exhibit.

          Section 11.9  Termination of Defined Benefit Plans.  In the event of
                        ------------------------------------
a termination of a Defined Benefit Plan, any assets and liabilities arising out
of such Defined Benefit Plan shall be distributed to PPG in accordance with
Section 9.3(d) of the Contribution Agreement.

                                  Article XII.
                        Allocation of Profits and Losses
                        --------------------------------

          Section 12.1.  Allocation of Profits and Losses.  Except as
                         --------------------------------
otherwise set forth in Section 12.2 hereof, after giving effect to the
regulatory allocations set forth in Section 12.4 hereof, and subject to Section
12.3 hereof, all Profits and Losses shall be allocated to each of the Members in
proportion to their respective Equity Percentages.

          Section 12.2.  Allocation of Profits and Losses - Special Allocations.
                         ------------------------------------------------------
Notwithstanding Section 12.1. of this Agreement:

          (a) The Members may by resolution agree that an item of income or
expense (and any item of income, gain, loss, deduction or credit attributable to
such item) shall be credited or charged, as the case may be solely to the
Capital Account of a Member.

          (b) Any items of income or expense attributable to the Defined Benefit
Pension Plans shall be allocated solely to PPG, and such allocation shall not
alter the Equity Percentage of any Member, as determined in accordance with the
terms of this Agreement.

          (c) Any item of interest expense relating to any Basket Loan shall be
allocated solely to the Majority Member.

          Section 12.3.  Limitation on Loss Allocation.  Notwithstanding
                         -----------------------------
anything in Section 12.1 hereof, Losses allocated pursuant to Section 12.1
hereof shall not exceed the maximum amount of Losses that can be so allocated
without causing a Member to have an Adjusted Capital Account Deficit at the end
of any Fiscal Year.  In the event one of the Members would have an Adjusted
Capital Account Deficit as a consequence of an allocation of Losses pursuant to
Section 12.1 hereof, the limitation set forth herein shall be applied on a
Member by Member basis so as to allocate the maximum permissible Losses to each
Member under Section

                                       33
<PAGE>

1.704-1(b)(2)(ii)(d) of the Treasury Regulations. All Losses in excess of the
foregoing limitation shall be allocated to the Members in proportion to their
respective Equity Percentages.

          Section 12.4.  Regulatory Allocations.  Notwithstanding anything to
                         ----------------------
the contrary contained in Sections 12.1 or 12.3 hereof or elsewhere in this
Agreement, it is the intention of the Members that Profits and Losses be
allocated in accordance with the "partnership minimum gain chargeback" (Treasury
Regulations Sections 1.704-2(f) and 1.704-2(g)(2)), "partner minimum gain
chargeback" (Treasury Regulations Sections 1.704-2(f)(5), 1.704-2(i)(4), 1.704-
2(i)(5) and 1.704-2(j)(2)), "qualified income offset" and "alternate test for
economic effect" (Treasury Regulations Section 1.704-1(b)(2)(ii)(d)),
"partnership nonrecourse deductions" (Treasury Regulations Section 1.704-
2(b)(1)) and "partner non-recourse deductions" (Treasury Regulations Section
1.704-2(i)(1)) provisions of Treasury Regulations Section 1.704-1(b) and Section
1.704-2 and any successor regulations (collectively, the "Regulatory
Allocations") and, to the extent any provisions of this Agreement do not comply
therewith, the Members desire and intend that such provisions be modified or
stricken in such respects as are necessary in order to cause compliance
therewith.  The Regulatory Allocations that shall govern this Agreement are set
forth in the Tax Matters Exhibit.

          Section 12.5.  Tax Allocations:  Section 704(c) of the Code.  In
                         --------------------------------------------
accordance with Section 704(c) of the Code, income, gain, loss and deduction
with respect to any property contributed to the Company shall, solely for tax
purposes, be allocated among the Members so as to take account of any variation
between the adjusted basis of such property to the Company for income tax
purposes and its book value, in the same manner as such variations are treated
under Section 704(c) of the Code.  The Members hereby agree to use the remedial
allocation method, as described in Treasury Regulation Section 1.704-3(d), for
such allocations relating to all items of inventory contributed to the Company
by the Members.  The Members hereby agree to use the traditional method with
curative allocations as such method is described in Treasury Regulation Section
1.704-3(c), for such allocation relating to all other items of property
contributed to the Company by the Members.  Allocations pursuant to this Section
12.5 are solely for purposes of federal, state and local taxes and shall not
affect, or in any way be taken into account in computing, any Member's Capital
Account or share of income, gain, loss or deduction pursuant to any provision of
this Agreement.

          Section 12.6.  Other Allocation Rules.  In the event of any changes
                         ----------------------
in the Members' Equity Percentages during a Fiscal Year, all Profits and Losses
from operations of the Company during such Fiscal Year, using such methods of
accounting for depreciation and other items as a Board Supermajority determines
to use for federal income tax purposes, shall be allocated to each Member based
on its varying interest in the Company during such operating year in accordance
with Section 706 of the Code.  A Board Supermajority shall determine in
accordance with Section 706 of the Code whether to prorate items of income and
deduction according to the portion of the Fiscal Year for which a Member held a
particular Equity Percentage or whether to close the books on an interim basis
and divide such operating year into two (2) or more segments.  All tax credits
shall be allocated among the Members in accordance with applicable law.

                                       34
<PAGE>

                                 Article XIII.
                                 Distributions
                                 -------------

          Section 13.1.  Distributions.
                         -------------

          (a) Within thirty (30) days after the end of each fiscal quarter of
the Company, the Company shall distribute 90% of the Net Cash Flow generated in
such quarter as determined from the quarterly financial reports of the Company
for such quarter; provided that, if the Company's Debt/Cap. Ratio prior to any
                  -------- -----
quarterly distribution exceeds 25%, Net Cash Flow must be used first to reduce
the principal outstanding on such debt such that the Debt/Cap. Ratio will not
exceed 25% subsequent to such distribution.  For the avoidance of doubt, the
Members acknowledge that, to the extent any distribution of Net Cash Flow would
cause the Company's Debt/Cap. Ratio to exceed 25% after such distribution, the
Company shall reduce the amount of such distribution to an amount that would
result in the Company's Debt/Cap. Ratio equaling 25%.  A Board Supermajority may
distribute Net Cash Flow to the Members at such times and in such amounts as it
may determine in its discretion; but, in any event, shall comply with the
immediately preceding sentence of this Section 13.1.  All distributions of Net
Cash Flow shall be distributed to the Members in proportion to their respective
Equity Percentages.  It is the intent of the Members that all distributions
pursuant to this Section 13.1 which occur during the first twenty-four (24)
months following the Closing Date shall be limited to operating cash flow
distributions as such term is defined in Treasury Regulation Section 1.707-4(b).
Any inadvertent distributions in excess of Operating Cash Flow shall be
considered as loans from the Company to the Member.

          (b) Notwithstanding the foregoing, 100% of the net proceeds of any
asset disposition (or series of related asset dispositions), the gross selling
price of which equaled or exceeded $1,000,000, shall, within five (5) business
days of the closing of such disposition (or series of related dispositions), be
distributed to the Members in proportion to their respective Equity Percentages.

          Section 13.2  Advance Distributions for Basket Amounts

          (a) In any Fiscal Year, the sum of (i) Capital Expenditures in excess
of the lesser of (A) 120% of the amount set forth in the Capital Expenditure
Budget properly approved pursuant to Article VI hereof as of the beginning of a
Fiscal Year, or (B) 150% of the depreciation scheduled for such Fiscal Year,
plus (ii) cash loans or cash advances (including payments made by the Company
pursuant to financial guaranties) other than loans or advances to employees in
accordance with the Company's travel and relocation policies then in effect,
such sum, when multiplied by 90% of the Minority Member's then-current Equity
Percentage, shall be treated as "Basket Capital Expenditures."  Basket Capital
Expenditures incurred in a Fiscal Year shall be computed, in the aggregate,
annually, on a cumulative basis ("Basket Amount").  Within thirty (30) days
after the end of each Fiscal Year, the Company shall deliver to the Minority
Member a "Basket Compliance Certificate," certified by the Chief Financial
Officer, which shall set forth, in reasonable detail (including a break-out for
each category described in the first sentence of this paragraph), the Company's
determination of such Fiscal Year's Basket

                                       35
<PAGE>

Capital Expenditures, and the accumulating Basket Amount as of the end of such
Fiscal Year. Within thirty (30) days following the delivery of the Basket
Compliance Certificate with respect to the first Fiscal Year of the Company
after the Closing during which the Basket Amount has equaled or exceeded Seven
Million Five Hundred Thousand Dollars ($7.5 million), an advance distribution
will be made to the Minority Member in the amount of Seven Million Five Hundred
Thousand Dollars ($7.5 million) (an "Advance Distribution"); provided, however,
in the event, for such Fiscal Year, the additional Basket Amount, if any, in
excess of the amount of the initial Advance Distribution equals or exceeds Five
Million Five Hundred Thousand Dollars ($5.5 million), then one or more
additional advance distributions shall be made to the Minority Member in
increments of Five Million Five Hundred Thousand Dollars ($5.5 million)
corresponding to excess Basket Amounts, if any, in the amount of Five Million
Five Hundred Thousand Dollars ($5.5 million) (also, an "Advance Distribution").
Thereafter, within thirty (30) days following the delivery of the Basket
Compliance Certificate with respect to any Fiscal Year of the Company after the
first Fiscal Year following which an Advance Distribution has been made and
during which the subsequent Basket Amount has equaled or exceeded Five Million
Five Hundred Thousand Dollars ($5.5 million), an Advance Distribution will be
made to the Minority Member in such number of increments of Five Million Five
Hundred Thousand Dollars ($5.5 million) as corresponds to the number of Basket
Amounts for such Fiscal Year in the amount of Five Million Five Hundred Thousand
Dollars ($5.5 million). When an Advance Distribution is made, the Basket Amount
at such time will be reduced by the amount of the Advance Distribution then
paid. Any amounts in the Basket Amount in excess of the Advance Distribution
will remain in the Basket Amount, subject to future accumulations and
distributions in accordance with this Section 13.2. All Advance Distributions
made to the Minority Member shall result in a debit to the Minority Member's
Capital Account in an amount equal to such Advance Distribution in a manner
consistent with Section 1 of the Tax Matters Exhibit.

          (b)       (i)   Notwithstanding any other provision of this Agreement
to the contrary, the Company shall obtain an interest-bearing loan from the
Majority Member (if it agrees, in its sole discretion, to do so) or from a third
party in an amount equal to the amount of the Advance Distribution (a "Basket
Loan"), which loan shall be guaranteed by the Majority Member if required by the
third party lender. The proceeds from the Basket Loan shall be paid to the
Minority Member as the Advance Distribution.

                    (ii)  Interest on the Basket Loan shall be paid by the
Company, any such interest payments to be made out of, and reduce, the
distributions which would otherwise be payable to the Majority Member pursuant
to Section 13.1 hereof. Interest expense with respect to the Basket Loan shall
be allocated to the Majority Member in accordance with Section 12.1 hereof. Upon
repayment of the Basket Loan in accordance with this Section 13.2, no further
interest payments shall be made or reduce distributions to the Majority Member.

                    (iii) At the same time that any distribution is paid
pursuant to Section 13.1 hereof, for any fiscal quarter following the obtaining
of a Basket Loan during which there is an amount outstanding on any such Basket
Loan, the Company shall make a payment of principal with respect to such Basket
Loan, such payment to be in the amount of

                                       36
<PAGE>

sixty-six (66%) percent of ten (10%) percent of the Net Cash Flow of the Company
determined in accordance with Section 13.1.

                    (iv)   Any such Basket Loan shall not be counted in
computing the Debt/Cap. Ratio, and shall be disregarded in determining
compliance with Sections 6.15(d), 11.4 and 13.1 hereof.

                    (v)    In no event shall any transaction pursuant to this
Section 13.2 increase or reduce the Equity Percentage of the Majority Member or
the Minority Member.

          (c)  In the event of (i) the consummation of a Reorganization
transaction or (ii) a dissolution or liquidation of the Company in accordance
with this Agreement, the following shall occur:  (a) any balance in the Basket
Amount shall be reduced to zero, (b) there will be no future accumulations to
the Basket Amount or distributions pursuant to subsection (a) of this Section
13.2, and (c) all Advance Distributions paid by the Company pursuant to
subsection (a) of this Section 13.2 shall be repaid, within thirty (30) days
after the consummation of such event, by the Minority Member to the Company
(which repayment will, in the event only of a liquidation and dissolution of the
Company, be made solely by a reduction in the amounts to be distributed to the
Minority Member and, in the event only of a Reorganization transaction, be made
solely by a reduction in the amount of transaction proceeds received by the
Minority Member for such Reorganization transaction).  Any such repayment under
this clause (c) shall be treated as a Capital Contribution by the Minority
Member occurring immediately before such dissolution, liquidation or
Reorganization transaction.

          (d)  In the event of a Change in Control transaction (other than an
"Apogee MBO," as defined below) or in the event of a Transfer of its Membership
Interest by Apogee pursuant to Section 14.3(b)(ii) hereof:

               (i)    any balance in the Basket Amount shall be reduced to zero;

               (ii)   there will be no future accumulations to the Basket
Amount or distributions pursuant to Section 13.2(a) hereof;

               (iii)  in the event that PPG exercises its election under Section
14.1(b)(i) or Section 14.3 (b)(ii) hereof, if applicable, all Advance
Distributions previously paid by the Company to the Minority Member pursuant to
Section 13.2(a) hereof shall be repaid, solely by a reduction in the amount of
transaction proceeds received by the Minority Member pursuant to such election,
in the same proportion of cash-to-promissory note as the Minority Member
receives from PPG pursuant to Section 14.3(b)(i) or Section 14.3(b)(ii), as
applicable, with the ratable portion of such payment in the form of a note to be
repaid to the Company in the same proportion, and at the same time, as PPG pays
its promissory note to the Minority Member;

               (iv)   in the event that PPG exercises its election under Section
     14.1(b)(ii) hereof, if applicable, a pro rata portion, equal to 41.18%, of
                                          --- ----
     the

                                       37
<PAGE>

     Advance Distributions previously paid by the Company to the Minority
     Member pursuant to Section 13.2(a) hereof shall be repaid, solely by a
     reduction in the amount of transaction proceeds received by the Minority
     Member pursuant to such election; the remainder of such Advance
     Distribution to be repaid at the time such payment would otherwise come due
     pursuant to Section 13.2(a) hereof;

                    (v)    in the event that PPG exercises its election under
Section 14.1(b)(iii), if applicable, all Advance Distributions previously paid
by the Company to the Minority Member pursuant to Section 13.2(a) hereof shall
be repaid at the time such payment would come due pursuant to Section 13.2(c)
hereof; and

                    (vi)   in the event that PPG exercises its election under
Section 14.3(b)(ii) hereof, if applicable, all Advance Distributions previously
paid by the Company to the Minority Member pursuant to Section 13.2(a) hereof
shall be repaid at the time such payment would come due pursuant to Section
13.2(c) hereof.

          (e)  In the event of an Apogee MBO, the terms of this Section 13.2
shall continue in full force and effect until such time as more than 50% of the
board of directors of Apogee (or any Person that acquires Apogee, if applicable)
immediately following the closing of the Apogee MBO (or any successors who have
been duly elected by such original members or their duly elected successors) are
no longer members of the board of directors, in which event:

               (i)    any balance in the Basket Amount shall be reduced to zero;

               (ii)   there will be no future accumulations to the Basket Amount
or distributions pursuant to Section 13.2(a) hereof; and

               (iii)  all Advance Distributions previously paid by the Company
to the Minority Member pursuant to Section 13.2(a) hereof shall be repaid at the
time such payment would come due pursuant to Section 13.2(c) hereof.

          (f)  As used herein, "Apogee MBO" means a "going-private" transaction
in which the then-current management of Apogee, at the time Apogee is publicly
held, acquires (with the assistance of independent, third-party financial
sources) Control of Apogee through the leveraged acquisition of a majority of
the outstanding shares of Apogee.

          (g)  At such time that PPG no longer retains the right to designate a
majority of the Board of Managers under Section 6.3 of this Agreement:

               (i)    any balance in the Basket Amount shall be reduced to zero;

               (ii)   there will be no future accumulations to the Basket Amount
or distributions pursuant to Section 13.2(a) hereof; and

                                       38
<PAGE>

               (iii)  all Advance Distributions previously paid by the Company
to the Minority Member pursuant to Section 13.2(a) hereof shall be repaid at the
time such payment would come due pursuant to Section 13.2(c) hereof.

          Section 13.3.  Limitations on Distributions.  Notwithstanding any
                         ----------------------------
provision to the contrary in this Article XIII:

          (a)  All distributions made in connection with the liquidation and
winding up of the Company shall be made in the manner provided in Section
14.3(e) and 15.3 hereof; and

          (b)  No distribution shall be made that would result in a violation of
Section 18-607 of the Act.

                                  Article XIV.
                Rights in the Event of a Change in Control of a
                -----------------------------------------------
                     Member and Poor Financial Performance
                     -------------------------------------

          INTRODUCTORY NOTE:  The Members understand and agree that the terms of
this Article XIV shall apply only for the period during which 100% of the
Company's equity interest is owned solely by PPG and Apogee and their respective
Affiliates.  In the event that an unaffiliated third party becomes a Member, PPG
and Apogee (so long as they are Members) shall in good faith attempt to modify
this Article XIV to consider appropriately the interests of such new Member.
The provisions of this Article XIV shall supersede Section 4.8 as to the
requirement for a Member Special Vote to the extent otherwise applicable, under
Section 4.8.

          Section 14.1.  PPG Purchase Rights Upon a Change in Control of Apogee.
                         ------------------------------------------------------
In the event of a Change in Control of Apogee (Apogee and its successor
resulting from such Change in Control is referred to as the "Minority Member" in
this Section 14.1), PPG shall have the options set forth in this Section 14.1.

          (a)  Within five (5) days of the occurrence of a Change in Control of
Apogee, the Minority Member shall give written notice to PPG and the Company of
such Change in Control, which notice shall contain (i) the date of the Change in
Control of Apogee and (ii) the identity of the Person or Persons to whom control
has been transferred.  The date upon which such notice is given is referred to
herein as the "Apogee Notice Date."

          (b)  Within sixty (60) days of the Apogee Notice Date, PPG shall give
written notice to the Minority Member of its election to do one of the
following:

               (i)    purchase all of the Minority Member's Membership Interest
     at a purchase price equal to the Buy-Out Formula Price (as defined below),
     payable as set forth in subsection (c) of this Section 14.1;

               (ii)   purchase such portion of the Minority Member's total
     Membership Interest as would reduce the Minority Member's total Membership
     Interest to 20% at a

                                       39
<PAGE>

     purchase price determined with reference to the "Buy-Out Formula Price"
     payable as set forth in subsection (d) of this Section 14.1; or

               (iii)  accept the Minority Member without objection, in which
     event the Minority Member shall retain all of the rights and be subject to
     all of the obligations of Apogee under this Agreement.

          In the event PPG does not make an election as required under this
Section 14.1(b) during the sixty (60)-day period, PPG shall be deemed to have
made the election set forth in Section 14.1(b)(iii) hereof.

          As used herein, the "Buy-Out Formula Price" means the greater of (i)
six (6) times 50% of the cumulative, consolidated EBITDA of the Company
determined from the latest twenty-four (24) months of operations of the Company
and its Subsidiaries, adjusted to subtract the outstanding principal and
interest balance of all credit-for-money-borrowed facilities (whether the
remaining maturities thereof are greater than or less than twelve (12) months)
to which the Company is then a party and to add cash on hand and (ii) 120% of
the Company's consolidated net book value, as determined from the Company's
consolidated balance sheet as of its most recently completed month-end, in each
case multiplied by such selling Member's Equity Percentage.  In the event of a
purchase hereunder before the completion of the second full Fiscal Year of the
Company, the Buy-Out Formula Price shall be determined under clause (ii) of the
preceding sentence.

          (c) If PPG exercises its option to purchase all of the Minority
Member's Membership Interest under subsection (b)(i) of this Section 14.1, PPG
shall pay the purchase price determined thereunder one-third in cash with the
balance payable on the fifth anniversary of the Minority Member Purchase Date
(as defined below).  Within thirty (30) days after the later of (i) the date PPG
gives notice of its intention to purchase all of the Minority Member's
Membership Interest and (ii) the date upon which the applicable purchase price
is determined (such date, the "Minority Member Purchase Date"), PPG shall
deliver to the Minority Member one-third of the purchase price, by wire transfer
of immediately available funds, and its promissory note for the balance of the
purchase price in the form of Exhibit 3, which note shall provide for prepayment
of such note without penalty and shall bear interest at a rate per annum
comparable to the then corporate PPG bond rating for comparable maturity
instruments.  On the Minority Member Purchase Date, the Minority Member shall
execute and deliver to PPG such documents and certificates as PPG deems
necessary to effect the transfer to PPG of the Minority Member's Membership
Interest free of all liens and encumbrances.

          (d) If PPG exercises its option to purchase a portion of the Minority
Member's Membership Interest under subsection (b)(ii) of this Section 14.1, PPG
shall pay the purchase price determined thereunder entirely in cash on the
Minority Member Purchase Date, by wire transfer of immediately available funds
to the Minority Member.  On the Minority Member Purchase Date, the Minority
Member shall execute and deliver to PPG such documents and certificates as PPG
deems necessary to effect the transfer to PPG of the portion of the Minority
Member's Membership Interest being purchased by PPG free of all liens and

                                       40
<PAGE>

encumbrances.  As of the Minority Member Purchase Date with regard to a purchase
under subsection (b)(ii) of this Section 14.1, the provisions of this Agreement
under Section 6.15 hereof and elsewhere requiring a Board Supermajority with
respect to the taking of certain actions shall be of no further force and effect
and the Minority Member shall not have any rights with respect thereto as to
actions taken or proposed to be taken after the Minority Member Purchase Date.

          (e)  In the event of a Change in Control of Apogee, Apogee's
Membership Interest may be Transferred to the successor-in-interest to Apogee
without the consent of any other Member and without compliance with the
restrictions on transferability set forth in Section 9.2 hereof, subject only to
Section 9.4 and to the rights of such other Member set forth in this Section
14.1.

          Section 14.2  Apogee Repurchase Right Upon a Change in Control of
                        ---------------------------------------------------
PPG's Glass Business.  In the event of a Change in Control of PPG's Glass
--------------------
Business (as defined below) (PPG and its successor resulting from such Change in
Control is herein referred to as the "Majority Member"), Apogee shall have the
rights set forth in this Section 14.2.  As used herein, "PPG's Glass Business"
means its automotive flat glass manufacturing auto glass fabrication and
automotive replacement glass businesses, so long as these businesses continue to
be an integrated operation; if they are not so integrated, then it shall mean
only PPG's automotive replacement glass business.  For the avoidance of doubt,
PPG's automotive replacement glass business may have a Change in Control
independent from the rest of the PPG Glass Business; therefore, the terms of
this Section 14.2 shall apply to a Change in Control of any of PPG, PPG's Glass
Business or PPG's automotive replacement glass business.

          (a)  Within five (5) days of the occurrence of a Change in Control of
PPG's Glass Business, the Majority Member shall give written notice to Apogee
and the Company of such Change in Control, which notice shall contain (i) the
date of the Change in Control of PPG's Glass Business and (ii) the identity of
the Person or Persons to whom control has been transferred.  The date upon which
such notice is given is referred to herein as the "ARG Notice Date."

          (b)  Within sixty (60) days of the ARG Notice Date, Apogee shall give
written notice to the Majority Member of its election to do one of the
following:

               (i)  require the Majority Member to purchase from Apogee all of
     Apogee's Membership Interest at a purchase price equal to the Buy-Out
     Formula Price, payable in cash as set forth in subsection (c) below; or

               (ii) accept the Majority Member without objection, in which event
     the Majority Member shall retain all of the rights and be subject to all of
     the obligations of PPG under this Agreement.

          (c)  If Apogee exercises its option to require the Majority Member to
purchase all of Apogee's Membership Interest under subsection (b)(i) of this
Section 14.2, the Majority

                                       41
<PAGE>

Member shall pay the purchase price entirely in cash by wire transfer of
immediately available funds to Apogee within thirty (30) days after the later of
(i) the date Apogee gives notice of exercise of its option to require the
Majority Member to purchase all of Apogee's Membership Interest or (ii) the date
upon which the applicable purchase price is determined (such date, the "Apogee
Repurchase Date"). On the Apogee Repurchase Date, Apogee shall execute and
deliver to the Majority Member such documents and certificates as the Majority
Member deems necessary to effect the transfer to the Majority Member of Apogee's
Membership Interest free of all liens and encumbrances.

          (d)  In the event of a Change in Control of any of PPG, PPG's Glass
Business or of PPG's automotive replacement glass business, PPG's Membership
Interest may be Transferred to the successor-in-interest to such business
without the consent of any other Member and without compliance with the
restrictions on transferability set forth in Section 9.2 hereof, subject only to
Section 9.4 and to the rights of such other Member set forth in this Section
14.2.

          Section 14.3  Apogee's Rights in the Event of Poor Financial
                        ----------------------------------------------
Performance.  If at any time subsequent to the fifth anniversary of the date
-----------
hereof (the "Performance Measurement Period"), a "Poor Financial Performance
Event" occurs and is continuing, Apogee shall have the rights set forth in this
Section 14.3.  For purposes hereof, a "Poor Financial Performance Event" shall
be deemed to have occurred and be continuing at any time that with reference to
the immediately preceding trailing twenty-four (24) month period, either (i) the
Company's net earnings have declined by 20% over the applicable prior period or
(ii) the cumulative distributions to the Members have declined by 40% (after
adjusting for any extraordinary expenditures approved in advance by both Members
which have the effect of reducing such distributions) as compared to the
cumulative distributions to the Members during the applicable prior period.

          (a)  If at any time during the Performance Measurement Period, a Poor
Financial Performance Event has occurred and is continuing, Apogee shall have
the right to give written notice to PPG that it is exercising its rights under
this Section 14.3 (an "Apogee Performance Trigger Notice").  The date upon which
such notice is given is referred to herein as the "Apogee Performance Trigger
Notice Date."

          (b)  Within sixty (60) days of the Apogee Performance Trigger Notice
Date, PPG shall give written notice to Apogee of its election to do one of the
following:

               (i)  purchase all of Apogee's Membership Interest at a purchase
     price equal to the Buy-Out Formula Price, payable as set forth in
     subsection (c) of this Section 14.3;

               (ii) permit Apogee to seek to transfer all (but not a portion) of
     Apogee's Membership Interest to a third party in accordance with subsection
     (d) of this Section 14.3;

                                       42
<PAGE>

               (iii)  require Apogee jointly with PPG to pursue a Reorganization
     transaction; or

               (iv)   require Apogee jointly with PPG to pursue a prompt and
     orderly dissolution and liquidation of the Company in accordance with the
     procedures provided in subsection (e) of this Section 14.3.

          In the event PPG does not make an election as required under this
Section 14.3(b) during the sixty (60)-day period, Apogee shall be entitled to
make the election, with such election to be limited to one of  clauses (ii),
(iii) and (iv) above only, such election to be made by written notice to PPG.

          (c)  If PPG exercises its option to purchase all of Apogee's
Membership Interest under subsection (b)(i) of this Section 14.3, PPG shall pay
the purchase price determined thereunder one-third in cash with the balance
payable on the fifth anniversary of the Apogee Performance Trigger Purchase Date
(as defined below). Within thirty (30) days after the later of (i) the date PPG
gives notice of its intention to purchase all of Apogee's Membership Interest
under subsection (b)(i) of this Section 14.3 and (ii) the date upon which the
applicable purchase price is determined (such date, the "Apogee Performance
Trigger Purchase Date"), PPG shall deliver to Apogee one-third of the purchase
price, by wire transfer of immediately available funds, and its promissory note
for the balance of the purchase price in the form of Exhibit 3, which note shall
provide for prepayment of such note without penalty and shall bear interest at a
rate per annum comparable to the then corporate PPG bond rating for comparable
maturity instruments. On the Apogee Performance Trigger Purchase Date, Apogee
shall execute and deliver to PPG such documents and certificates as PPG deems
necessary to effect the transfer to PPG of Apogee's Membership Interest free of
all liens and encumbrances.

          (d)  If PPG permits Apogee to seek to transfer all of Apogee's
Membership Interest to a third party under subsection (b)(ii) of this Section
14.3:

               (i)    In order to transfer all of its Membership Interest to a
     third party, Apogee must first receive a bona fide written offer from a
     third party (the "Transferee") who would meet the general standards for a
     permitted transferee under Section 9.4 hereof (a "Qualified Transferee")
     accompanied by reasonable evidence of the Transferee's ability to finance
     the offer.  Apogee must then submit a copy of that offer to PPG , together
     with a written notice to the effect that Apogee intends in good faith to
     accept that offer.  By doing so, Apogee shall have offered to transfer its
     Membership Interest to PPG on the same terms and conditions as those
     offered by the Transferee (such an offer being referred to as a "Purchase
     Offer").  Apogee shall promptly and in good faith furnish PPG with all
     material non-confidential information which Apogee has about the Purchase
     Offer, the financing that supports the Purchase Offer and the Transferee,
     including, for example, information bearing on whether the Transferee is a
     Qualified Transferee.

               (ii)   Provided that the Transferee is a Qualified Transferee and
     there is reasonable evidence to support the Transferee's ability to finance
     the offer, PPG shall

                                       43
<PAGE>

     either accept the Purchase Offer or reject the Purchase Offer by so
     advising Apogee in writing no later than sixty (60) days after PPG receives
     the Purchase Offer. If PPG fails to make a timely election, PPG shall be
     deemed to have rejected the Purchase Offer. If PPG accepts the Purchase
     Offer, its acceptance shall specify the place and time (which shall be no
     later than thirty (30) days after its acceptance or such later date, if
     any, as is specified in the Transferee's offer) at which the closing of the
     transfer described in the Purchase Offer shall take place. Unless they
     mutually agree otherwise, PPG and Apogee shall proceed to close the
     transfer in accordance with the Purchase Offer and such schedule. If PPG
     rejects the Purchase Offer or is deemed to have done so, then, during the
     forty-five (45) days after that rejection, Apogee shall be entitled, but
     not obligated, to transfer its Membership Interest to the Transferee on
     terms and conditions that are no more favorable to the Transferee than
     those specified in the Purchase Offer. After a transfer to a Transferee in
     accordance with this Section 14.3, the Membership Interest so transferred
     shall continue to have all of the rights and be subject to all of the
     obligations set forth in this Agreement and the Transferee shall become a
     party to this Agreement in accordance with Article IX.

          (e)  If PPG elects jointly with Apogee to pursue a dissolution and
liquidation of the Company, the parties will follow the procedures set forth in
this subsection (e) in addition to complying with Article XV:

               (i)    PPG shall select, and thereafter be the sole owner of, two
     (2) branches (and all Company assets located therein and all Company
     liabilities and obligations specifically associated with such locations) of
     the Company's then-existing network of distribution locations (the
     "Network");

               (ii)   Apogee shall then select, and thereafter be the sole owner
     of, one branch (and all Company assets located therein and all Company
     liabilities and obligations specifically associated with such location) of
     the Network;

               (iii)  the Members shall continue as set forth in clauses (i) and
     (ii) above until there are either no branches of the Network remaining or
     each Member has had the opportunity to, but has declined to, select any
     remaining branches (any such unselected branch is herein referred to as an
     "Orphan Branch");

               (iv)   the Company shall be responsible for closing all Orphan
     Branches, and all associated costs thereof;

               (v)    all other Company assets unrelated to a specific branch
     (or held in an Orphan Branch) shall be divided between the members by
     mutual agreement; provided, that, if they are unable to so agree with
                       --------
     respect to any asset, then the member making the highest cash bid for such
     asset shall purchase it from the Company for cash payable at transfer of
     such asset;

                                       44
<PAGE>

               (vi)   the Company shall be responsible for all severance or
     other costs associated with a dissolution and liquidation of the Company
     that are not directly related to any branch selected by one of the Members;

               (vii)  the Members shall determine the value of all assets
     acquired (such values to be used for purposes of adjusting the "Gross Asset
     Values" (as defined in Exhibit 2 hereto) of Company assets as required by
     paragraph (ii) of the definition of Gross Asset Value) and liabilities
     assumed by each Member pursuant to the mechanism set forth above (the
     "Draft Value"); if a Member's Draft Value exceeds such Member's Capital
     Account, then such Member shall promptly pay to the Company an amount in
     cash equal to such excess;

               (viii) to the extent lawful and reasonable to do so, all
     employees located at a specific branch (excepting market managers and sales
     associates) will be allocated to such branch;

               (ix)   to the extent lawful and reasonable to do so, PPG and
     Apogee shall use a selection method similar to that set forth in clauses
     (i) and (ii) above to allocate employees of the Company not so associated
     with a specific branch (e.g., headquarters staff, sales associates and
     market managers) until each Member has declined to select any remaining
     employees of the Company. Any such employees who are not so selected, plus
     all employees employed at Orphan Branches, are hereby referred to as
     "Orphan Employees," and all obligations with respect to Orphan Employees
     shall remain with the Company in accordance with the terms of clause (vi)
     above; and

               (x)    each party will cooperate to obtain a transfer of the
     employees, assets and liabilities selected through the procedures set forth
     above.

          (f)  In the event that PPG elects either option (b)(ii) or (b)(iii) of
this Section 14.3 and a closing thereunder does not occur within six (6) months
of the Apogee Performance Trigger Notice Date, PPG and Apogee will be obligated
(unless they mutually agree otherwise) to pursue a dissolution and liquidation
of the Company in accordance with the procedures set forth in subsection (e) of
this Section 14.3 and Article XV.

          Section 14.4  PPG's Rights in the Event of Poor Financial Performance.
                        -------------------------------------------------------

          (a)  If  at any time during the Performance Measurement Period, a Poor
Financial Performance Event has occurred and is continuing, PPG shall have the
right to give written notice to Apogee that it is exercising its rights under
this Section 14.4 (a "PPG Performance Trigger Notice").  The date upon which
such notice is given is referred to herein as the "PPG Performance Trigger
Notice Date.

          (b)  In the PPG Performance Trigger Notice, PPG shall set forth its
election to either (i) pursue a Reorganization transaction or (ii) pursue
dissolution and liquidation of the Company in accordance with the procedures set
forth in Section 14.3(e) and Article XV.  If PPG

                                       45
<PAGE>

elects to pursue a Reorganization transaction, PPG shall have the right, during
the forty-five (45) day period following the PPG Performance Trigger Notice Date
to enter into a bona fide agreement with an unaffiliated third party for the
sale of all of PPG's Membership Interest to such third party and to require that
Apogee sell all of its Membership Interest to such party at a price and on terms
and conditions the same as those on which PPG has agreed to sell its Membership
Interest. PPG shall promptly notify Apogee in writing that it has entered into a
bona fide agreement as referred to in the immediately preceding sentence and
shall include a copy of such agreement with such notice. Subject to its right to
verify that PPG has complied with its obligations hereunder, Apogee shall as
promptly as practicable enter into such other agreements as shall be necessary
to comply with the provisions of this Section 14.4.

          (c) In the event that PPG elects to pursue a Reorganization
transaction under subsection (b)(i) of this Section 14.4 and a closing
thereunder does not occur within six (6) months of the PPG Performance Trigger
Notice Date, PPG and Apogee will be obligated (unless they mutually agree
otherwise) to pursue a dissolution and liquidation of the Company in accordance
with the procedures set forth in Section 14.3 (e) and Article XV.

                                  Article XV.
                          Dissolution and Liquidation
                          ---------------------------

          Section 15.1.  Events Causing Dissolution.  Except as otherwise
                         --------------------------
provided in this Agreement, the Company shall be dissolved only upon the
occurrence of any of the following events:

          (a) the sale, exchange or other disposition of all or substantially
all of the assets and properties of the Company;

          (b) such dissolution is triggered in accordance with Article XIV or
Section 19.15;

          (c) the written agreement of the Members who together hold 100% of the
outstanding Equity Percentage; or

          (d) the entry of a decree of judicial dissolution under Section 18-802
of the Act.

          Section 15.2.  Continuation of Business.  Upon the expulsion,
                         ------------------------
bankruptcy, retirement, resignation or dissolution of a Member or the occurrence
of any other event which terminates the continued membership of a Member in the
Company as provided in Section 18-801 of the Act, the Company shall not be
dissolved and its business shall continue unless, within ninety (90) days after
the occurrence of such event, the remaining Members determine in writing to
dissolve the business of the Company pursuant to Section 15.1(c) hereof.

          Section 15.3.  Liquidation and Winding Up.  If dissolution of the
                         --------------------------
Company should be caused by reason of the events set forth in Section 15.1
hereof or under

                                       46
<PAGE>

Section 14.3(e), the Company shall be liquidated and the Managers (or other
person or persons designated by a decree of court) shall wind up the affairs of
the Company. The Managers or other persons winding up the affairs of the Company
shall promptly proceed to the liquidation of the Company and, in settling the
accounts of the Company, after following the process set forth in Section
14.3(e) hereof, the assets and the property of the Company shall be distributed
in the following order of priority:

          (a) to the payment of all debts and liabilities of the Company in the
order of priority as provided by law (other than outstanding loans from a
Member);

          (b) to the establishment of any reserves deemed necessary by the
Managers or the person winding up the affairs of the Company for any contingent
liabilities or obligations of the Company;

          (c) to the repayment of any outstanding loans from a Member to the
Company; and

          (d) the balance, if any, to the Members as specifically provided under
other terms of this Agreement or otherwise pro rata in accordance with their
Capital Account balances, after giving effect to all contributions,
distributions, and allocations for all periods.

          (e) In the event of a dissolution and liquidation of the Company, any
assets and liabilities of the Defined Benefit Plans shall not be considered
assets and liabilities of the Company and such dissolution and liquidation shall
not affect the rights and obligations of PPG with respect to such Defined
Benefit Plans, as set forth in Section 9.3 of the Contribution Agreement.

          Section 15.4.  Compliance with Timing Requirements of Regulations.
                         --------------------------------------------------
In the event the Company is liquidated within the meaning of Treasury
Regulations Section 1.704-1(b)(2)(ii)(g), distributions shall be made pursuant
to this Article XV to the Members who have positive Capital Account balances in
compliance with Treasury Regulations Section 1.704-1(b)(2)(ii)(b)(2), and (b) if
a Member has a deficit balance in its Capital Account (after giving effect to
all contributions, distributions and allocations for all taxable years), such
Member shall have no obligation to contribute to the capital of the Company and
such deficit shall not be considered a debt owed to the Company or to any other
Person for any purpose whatsoever.

                                       47
<PAGE>

                                  Article XVI.
                                   Amendment
                                   ---------

          The Certificate of Formation and this Agreement may be amended only by
a Member Special Vote.

                                 Article XVII.
                   Approval of Reorganizations and Bankruptcy
                   ------------------------------------------

          Without a Member Special Vote (i) the Company shall not engage in any
Reorganization or (ii) commence any proceedings or the filing of any petition
seeking relief under Title 11 of the United States Code, as now constituted or
hereafter amended, or any other federal or state bankruptcy, insolvency or
similar law.

                                 Article XVIII.
                 Representations and Warranties of the Members
                 ---------------------------------------------

          Section 18.1.  Representations and Warranties of the Members.  Each
                         ---------------------------------------------
of the Members represents and warrants as of the date of this Agreement to the
other Member and the Company as follows:

          (a) The Membership Interest being acquired by such Member in
connection with the Closing is being purchased for such Member's own account and
not with a view to, or for sale in connection with, any distribution or public
offering thereof within the meaning of the Securities Act of 1933, as amended
(the "Securities Act").  Such Member understands that such Membership Interest
will not be registered under the Securities Act or any state securities laws by
reason of its contemplated issuance in transactions exempt from the registration
and prospectus delivery requirements thereof and that the reliance of the
Company and others upon such exemptions is predicated in part by the
representations and warranties of such Member contained herein.

          (b) Such Member has the requisite power and authority (whether
corporate or otherwise) and legal capacity to enter into, and to carry out its
obligations under, this Agreement.

          (c) The execution and delivery by such Member of this Agreement and
the consummation by such Member of the transactions contemplated hereby have
been duly authorized prior to the date of this Agreement by all necessary action
on the part of such Member.

          (d) This Agreement has been duly executed and delivered by such Member
and constitutes a valid and binding obligation enforceable against such Member
in accordance with its terms.

          (e) Such Member is not subject to, or obligated under, any provision
of (i) any agreement, arrangement or understanding, (ii) any license, franchise
or permit or (iii) any law,

                                       48
<PAGE>

regulation, order, judgment or decree that would be breached or violated, or in
respect of which a right of termination or acceleration or any encumbrance on
any of such Member's assets would be created, by such Member's execution,
delivery and performance of this Agreement or the consummation of the
transactions contemplated hereby, except for such agreements as to which a
                                  ------
Member has previously obtained the consent of the other party or parties
thereto.

          (f) No authorization, consent or approval of, waiver or exemption by,
or filing or registration with, any public body, court, third party or authority
is necessary on such Member's part, which has not previously been obtained by
such Member for the consummation of the transactions contemplated by this
Agreement.

          (g) No person or entity has or will have, as a result of any act or
omission by such Member any right, interest or valid claim against the Company
or any other Member for any commission, fee or other compensation as a finder or
broker, or in any similar capacity, in connection with the transactions
contemplated by this Agreement.

                                  Article XIX.
                            Miscellaneous Provisions
                            ------------------------

          Section 19.1. Channel Conflict; Confidentiality and Nonsolicitation.
                        -----------------------------------------------------

          (a)  Channel Conflict.  The Members have agreed to certain principles
               ----------------
involving the distribution of automotive windshields and tempered glass by the
Company and the Members, as follows, which principles shall apply so long as
PPG's Equity Percentage exceeds 50%:

               (i)   As the Company is a controlled subsidiary of PPG, sales and
     pricing to customers by the Company will be coordinated and set by PPG
     (independently of Apogee), subject to the principles set forth in a Channel
     Conflict Document ("CCD") agreed by the parties of even date herewith.

               (ii)  Except for sales of automotive windshields and tempered
     glass to the CCD customers listed in the CCD, and limited to the quantities
     identified in the CCD, either or both PPG and/or the Company may make sales
     to any customers in any quantities.

               (iii) In all situations in which PPG and the Company may make
     sales to the same customers, PPG has the right to coordinate sales and
     pricing to all such customers by the Company and by PPG.

               (iv)  Except for sales of automotive windshields and tempered
     glass to the CCD customers listed in the CCD, and limited to the quantities
     identified in the CCD, Apogee may make sales to any customers in any
     quantities at prices independently set by Apogee.  Apogee agrees that it
     shall prevent the disclosure to any employees of Apogee or its subsidiaries
     who have any involvement in sales under this Section

                                       49
<PAGE>

     19.1(a)(iv), of any proprietary, commercial information of the Company or
     PPG regarding pricing to customers of the Company or PPG.

If a Member believes, in good faith, that the market for distribution of such
products has materially changed after the date hereof such that the procedures
set forth in the CCD no longer are commercially viable, such Member shall be
entitled to propose modifications to the CCD, which modifications shall only be
effective upon a Member Special Vote.  If the Members do not agree to such
proposed modifications, such Member shall be entitled to trigger the dispute
resolution procedures set forth in Section 19.15 hereof.

          (b) Confidentiality.  Except as consented to by the Company and as and
              ---------------
to the extent required by law, each Member hereby agrees that neither it nor any
of its Affiliates will, directly, indirectly or otherwise, disclose, publish,
make available to, or use for its own benefit or the benefit of any Person for
any reason or purpose whatsoever, any Confidential Information; provided,
                                                                --------
however, that no Member or Affiliate thereof shall be obligated to treat as
-------
confidential any Confidential Information that (i) was publicly known at the
time of disclosure to such Member or Affiliate, (ii) becomes publicly known or
available thereafter other than by any means in violation of this Agreement or
any other duty owed to the Company by any person or entity or (iii) is lawfully
disclosed to such Member or Affiliate by a third party.  The parties hereto
stipulate and agree that the foregoing matters are important, material and
confidential proprietary information and trade secrets that affect the
successful conduct of the business of the Company (and any successor or assignee
of the Company).

          (c) Non-Solicitation.  In addition, each Member hereby agrees that,
              ----------------
during the Nonsolicitation Period, neither such Member nor any of its Affiliates
will, either on its own account or jointly with or as an advisor, agent,
representative, principal, partner, joint venturer, owner or equity holder or
otherwise on behalf of any other Person, directly or indirectly solicit or
attempt to solicit away from the Company, or otherwise interfere with the
employment relationship with, any officer, employee, representative or other
agent of the Company or offer employment to any person who, on or during the six
(6) months immediately preceding the date of such solicitation or offer, is or
was an officer, employee, representative or other agent of the Company;
provided, however, that the foregoing restrictions shall not apply to a Member
--------  -------
with respect to officers of the Company who remain employees of such Member; and
provided further, however, after three (3) years from the Closing, the foregoing
-------- -------  -------
restriction shall not apply to a Member or its Affiliate soliciting or
attempting to solicit up to two (2) Company employees per year who have the
equivalent of 551 "Hay points" or more, provided such employees who are to be
employed by a Member or its Affiliate remain employed by the Company for up to
ninety (90) days to allow a replacement to be hired.

          (d) Acknowledgment and Enforcement.  Each Member agrees that the
              ------------------------------
restrictions and agreements contained in this Section 19.1 are reasonable and
necessary to protect the legitimate interests of the Company and the other
Member and its Affiliates and that any breach of this Section 19.1 will cause
substantial and irreparable harm to the Company and the non-breaching Member and
its Affiliates that would not be quantifiable and for which no adequate remedy
would exist at law.  Accordingly, the Company and the non-breaching Member

                                       50
<PAGE>

shall each be entitled to obtain injunctive or other equitable relief for any
violation of this Section 19.1, without the necessity of proving damages or
posting of any bond, and such equitable relief shall be in addition to any other
remedies, whether at law or in equity, that may be available to the Company and
the non-breaching Member. Furthermore, each Member acknowledges and agrees that
if the Company fails to enforce this Section 19.1, each Member may take such
action as it deems necessary to ensure compliance by the other Member with the
terms of this Section 19.1.

          (e) Blue Pencil Doctrine.  If the duration or geographical extent of,
              --------------------
or business activities covered by, this Section 19.1 are in excess of what is
valid and enforceable under applicable law, then such provision shall be
construed to cover only that duration, geographical extent or activities that
are valid and enforceable.  Each Member acknowledges the uncertainty of the law
in this respect and expressly stipulates that this Agreement is to be given the
construction which renders its provisions valid and enforceable to the maximum
extent (not exceeding its express terms) possible under applicable law.

          Section 19.2.  Additional Actions and Documents.  Each of the
                         --------------------------------
Members hereby agrees to take or cause to be taken such further actions, to
execute, acknowledge, deliver and file, or cause to be executed, acknowledged,
delivered and filed such further documents and instruments, and to use all
reasonable efforts to obtain such consents, as may be necessary or as may be
reasonably requested in order to fully effectuate the purposes, terms and
conditions of this Agreement.

          Section 19.3.  Notice.  Any notice or other communication to any
                         ------
party in connection with this Agreement shall be in writing and shall be sent by
manual delivery, facsimile transmission, overnight courier or United States mail
(first class, postage prepaid) addressed, if to the Company, to the principal
office of the Company set forth in Section 1.2 hereof or to such other address
as the Company shall notify the Members in writing; and if to the Members, to
their respective addresses set forth in Schedule A hereof or in the register
maintained by the Company, or to such other address as any such Member may
hereafter designate by notice in writing to the Chair and Company.  All periods
of notice shall be measured from the date of delivery thereof if manually
delivered, when receipt is acknowledged if sent by facsimile transmission, from
the first business day after the date of sending if sent by overnight courier,
or from four (4) days after the date of mailing if mailed.

          Section 19.4.  Severability.  The invalidity of any one or more
                         ------------
provisions hereof or of any other agreement or instrument given pursuant to or
in connection with this Agreement shall not affect the remaining portions of
this Agreement or any such other agreement or instrument or any part thereof;
and in the event that one or more of the provisions contained herein or therein
should be invalid, or should operate to render this Agreement or any such other
agreement or instrument invalid, this Agreement and such other agreements and
instruments shall be construed as if such invalid provisions had not been
inserted.

                                       51
<PAGE>

          Section 19.5.  Survival.  It is the express intention and agreement
                         --------
of the Members that all covenants, agreements, statements, representations,
warranties and indemnities made in this Agreement shall survive the execution
and delivery of this Agreement.

          Section 19.6.  Waivers.  Neither the waiver by a Member of a breach
                         -------
of or a default under any of the provisions of this Agreement, nor the failure
of a Member, on one or more occasions, to enforce any of the provisions of this
Agreement or to exercise any right, remedy or privilege hereunder shall
thereafter be construed as a waiver of any such provisions, rights, remedies or
privileges hereunder.

          Section 19.7.  Exercise of Rights.  No failure or delay on the part
                         ------------------
of a Member or the Company in exercising any right, power or privilege hereunder
and no course of dealing between the Members or between a Member and the Company
shall operate as a waiver thereof, nor shall any single or partial exercise of
any right, power or privilege hereunder preclude any other or further exercise
thereof or the exercise of any other right, power or privilege.  The rights and
remedies herein expressly provided are cumulative and not exclusive of any other
rights or remedies which a Member or the Company would otherwise have at law or
in equity or otherwise.

          Section 19.8.  Binding Effect.  Subject to any provisions hereof
                         --------------
restricting assignment, this Agreement shall be binding upon and shall inure to
the benefit of the Members and their respective successors and permitted
assigns.

          Section 19.9.  Limitation on Benefits of this Agreement.  It is the
                         ----------------------------------------
explicit intention of the Members that no person or entity other than the
Members and the Company is or shall be entitled to bring any action to enforce
any provision of this Agreement against any Member or the Company, and that the
covenants, undertakings and agreements set forth in this Agreement shall be
solely for the benefit of, and shall be enforceable only by, the Members (or
their respective heirs, legal representatives, successors and assigns as
permitted hereunder) and the Company; provided, however, that the Indemnitees
                                      --------  -------
shall, as intended third-party beneficiaries thereof, be entitled to the
enforcement of Sections 8.1 and 8.2 hereof, but only as insofar as the
obligations sought to be enforced thereunder are those of the Company.

          Section 19.10.  Waiver of Partition.  The Members hereby waive any
                          -------------------
right of partition or any right to take any action that otherwise might be
available to them for the purpose of severing their relationship with the
Company or interest in assets held by the Company from the interest of the other
Members, except to the extent consistent with Article XIV and XV and Section
19.15 hereof.

          Section 19.11.  Entire Agreement.  This Agreement, any Schedules and
                          ----------------
Exhibits and the Certificate of Formation together contain the entire agreement
among the Members with respect to the matters contained herein, and supersedes
all prior oral or written agreements, commitments or understandings with respect
to the matters provided for herein.

                                       52
<PAGE>

          Section 19.12.  Pronouns.  All pronouns shall be deemed to refer to
                          --------
the masculine, feminine, neuter, singular or plural, as the identity of the
antecedent may require.

          Section 19.13.  Headings.  Article and Section headings contained in
                          --------
this Agreement are inserted for convenience of reference only, shall not be
deemed to be a part of this Agreement for any purpose, and shall not in any way
define or affect the meaning, construction or scope of any of the provisions
hereof.

          Section 19.14.  Governing Law.  This Agreement, the rights and
                          -------------
obligations of the parties hereto, and any claims or disputes relating thereto,
shall be governed by and construed in accordance with the laws of the State of
Delaware (but not including the choice of law rules thereof).

          Section 19.15.  Dispute Resolution.  Subject to the provisions of
                          ------------------
Sections 19.1 hereof, the Members agree to settle any controversy, claim or
dispute of whatever nature arising between them under this Agreement or in
connection with the transactions contemplated hereunder, including those arising
out of or relating to the breach, termination, enforceability, scope or validity
hereof (any such controversy, claim or dispute, a "Dispute"), as follows:

          (a) At the written request of a Member, each Member will direct its
Chief Financial Officer for Apogee and Senior Vice President, Finance for PPG to
meet and negotiate in good faith to resolve any Dispute.  The location, format,
frequency, duration and conclusion of these discussions shall be left to the
discretion of the Members, but may include participation by one or more of the
Managers designated by either Member.  Upon agreement between the Members, the
Members may utilize other alternative dispute resolution procedures such as
mediation to assist in the negotiations.  Discussions and correspondence among
the representatives of the Members for the purposes of these negotiations shall
be treated as Confidential Information developed for the purposes of settlement,
exempt from discovery and production, which shall not be admissible in any
lawsuit without the concurrence of both Members.  Documents identified in or
provided with such communications, which are not prepared for purposes of the
negotiations, are not so exempted and may, if otherwise admissible, be admitted
in evidence in such lawsuit or other binding proceeding agreed to by the
Members.

          (b) If the negotiations required by Section 19.15(a) hereof do not
resolve the Dispute within thirty (30) days after the initial written request,
the Members shall jointly select a neutral third party as a mediator to assist
the Members in resolving such Dispute, and continue to negotiate in good faith
to resolve the Dispute.

          (c) With respect only to Disputes that would not, with the passage of
time without resolution, enable a Member to deliver a Dispute Trigger Notice
under subsection (d) of this Section 19.15, in the event that the mediation
provided under subsection (b) of this Section 19.15 does not resolve the Dispute
within forty-five (45) days after commencement thereof, then the parties will
resolve such Dispute under the provisions of this subsection (c).  Any
unresolved Dispute shall be settled by binding arbitration in accordance with
the then current CPR Rules for Non-Administered Arbitration in effect on the
date of the referral of such dispute to arbitration

                                       53
<PAGE>

by three (3) independent and impartial arbitrators, none of whom shall be
appointed by either party, provided however, at least one (1) arbitrator shall
be a retired judge (collectively, the "Arbitrators"). The arbitration shall be
governed by the Federal Arbitration Act, 9 U.S.C. (S)1-16 (the "Federal
Arbitration Act") to the exclusion of state laws inconsistent therewith and
judgment upon the award rendered by the Arbitrators may be entered by any court
having jurisdiction thereof. The Arbitrators are not empowered to award a
monetary amount in excess of compensatory damages sufficient to reimburse fully
and make whole the prevailing party for all direct, out-of-pocket costs and
expenses, including reasonable attorney's fees, incurred by the prevailing
party, it being understood that the prevailing party shall also be entitled to
reimbursement for additional direct, out-of-pocket costs and expenses, including
reasonable attorneys' fees, that must be incurred by such prevailing party after
the date of the Arbitrators' award on account of the same set of facts and
circumstances giving rise to that award. Each party hereby irrevocably waives
the right to recover any excess monetary damages with respect to disputes
resolved by arbitration herein. Either party shall have the right to seek, at
its own cost and expense, preliminary and temporary injunctive relief solely to
preserve the status quo of the parties, pending the Arbitrators' determination.
The following procedures shall apply:

               (i)   unless the parties agree otherwise, the place of
     arbitration shall be in Pittsburgh, Pennsylvania if the arbitration is
     initiated by Apogee and Minneapolis, Minnesota if the arbitration is
     initiated by PPG;

               (ii)  the parties may review and delete potential Arbitrators
     from the panel list before final selection of the arbitration panel is made
     from such list;

               (iii) prior to the actual arbitration hearing, each party shall
     provide the Arbitrators, in writing, with the exact ruling (monetary and/or
     otherwise) that it seeks the Arbitrators to render on its behalf;

               (iv)  the Arbitrators, acting by at least a two (2) to one (1)
     majority determination, must render their decision in favor of one party or
     the other in the exact form of the ruling requested by the prevailing
     party;

               (v)   the Arbitrators must determine the prevailing party by
     interpreting the meaning and intent of the language of the Agreement,
     applying the applicable law to the relevant facts and picking the
     arbitration ruling proposed by the party that most closely correlates to
     their decision based upon the Agreement, the applicable law and the
     relevant facts;

               (vi)  the losing party shall pay all costs, fees and expenses of
     the Arbitrators and the arbitration process charged to the parties.  This
     does not include the cost of attorneys' fees, travel costs, preparation
     time or other costs incurred by the parties or their witnesses, including
     experts, which costs shall be paid by the party incurring them;

               (vii) except as provided in the Federal Arbitration Act, the
     decision of

                                       54
<PAGE>

     the Arbitrators is final and binding on the parties, and no appeal of any
     kind may be taken;

               (viii) unless otherwise provided in the Agreement, the statute
     of limitations of the State of Delaware applicable to the commencement of a
     lawsuit shall apply to the commencement of an arbitration hereunder, except
     that no defenses shall be available based upon the passage of time during
     any negotiation or mediation called for by subsection (b) of this Section
     19.15; and

               (ix)   in the event of any inconsistency or conflict between this
     subsection (c) of Section 19.15 and the applicable CPR Rules for Non-
     Administered Arbitration, this subsection (c) of Section 19.15 shall govern
     and control.

          (d)  With respect only to a Dispute regarding an action requiring
either a Member Special Vote (including a failure to obtain a quorum at a Member
meeting on two (2) consecutive occasions to consider such a matter) or a Board
Supermajority that is continuing without resolution sixty (60) days after the
Members have obtained the assistance of a neutral mediator in accordance with
subsection (b) of this Section 19.15, either Member shall have the right to send
written notice that it is exercising its dispute trigger rights under this
Section 19.15 with the consequence set forth herein (a "Dispute Trigger
Notice").

          (e)  If Apogee sends a Dispute Trigger Notice to PPG in accordance
with subsection (d) of this Section 19.15, such Dispute Trigger Notice will have
the same legal force and effect and thereby give rise to the same rights and
obligations as the delivery of an Apogee Performance Trigger Notice under
Section 14.3.

          (f)  If PPG sends a Dispute Trigger Notice to Apogee in accordance
with subsection (d) of this Section 19.15 (a "PPG Dispute Trigger Notice"),
Apogee will respond in writing within sixty (60) days to PPG as to its
preference of either:

               (i)  PPG purchasing all of Apogee's Membership interest at the
     purchase price and on the same payment schedule as would be obtained under
     a purchase of all of Apogee's Membership Interest pursuant to Section
     14.3(b)(i) and 14.3(c); or

               (ii) dissolution and liquidation of the Company in accordance
     with the procedures provided in Section 14.3 and Article XV.

          (g)  If Apogee requests in its response a purchase of all of its
Membership Interest under subsection (e)(i) of this Section 19.15, PPG will
respond in writing within sixty (60) days that it will either:

               (i)  complete such purchase as if it was purchasing all of
     Apogee's Membership Interest pursuant to Section 14.3 (in which event PPG
     will be obligated to complete such purchase in accordance with the
     requirements of Section 14.3); or

                                       55
<PAGE>

               (ii) dissolve and liquidate the Company in accordance with the
     procedures provided in Section 14.3(e) and Article XV.

In the event that PPG does not make an election as required under this Section
19.15(f) within the sixty (60)-day period described above, PPG shall be deemed
to have made the election set forth in Section 19.15(f)(ii) hereof.

          (h) If Apogee either requests in its response a dissolution and
liquidation under subsection (e)(ii) of this Section 19.15 or does not respond
to the PPG Dispute Trigger Notice within the sixty (60) days provided, PPG will
pursue a dissolution and liquidation of the Company in accordance with the
procedures provided in Section 14.3(e) and Article XV.

          For the avoidance of doubt, the Members agree that, except for a
Member's right to propose modifications to the Channel Conflict Procedures and,
if rejected, to treat such rejection as a "Dispute" for purposes of this Section
19.15, no amendment of this Agreement proposed by a Member that is not adopted
by Member Special Vote shall, in and of itself alone (and without taking into
account other circumstances which may bear on such proposal) enable a Member to
trigger the dispute resolution mechanisms of this Section 19.15.  Either Member
may enforce its rights under subsections (d)-(h) of this Section 19.15, as the
case may be, through the binding arbitration procedures set forth in subsection
(c) of this Section 19.15.

          Section 19.16.  Jurisdiction; Venue; Process.  The parties to this
                          ----------------------------
Agreement agree that jurisdiction and venue in any action brought by any party
hereto pursuant to this Agreement shall properly (but not exclusively) lie in
any federal or state court located in the State of Minnesota, County of Hennepin
or the Commonwealth of Pennsylvania, County of Allegheny.  By execution and
delivery of this Agreement, the parties hereto irrevocably submit to the
jurisdiction of such courts for itself and in respect of its property with
respect to such action.  The parties hereto irrevocably agree that venue would
be proper in such court, and hereby waive any objection that such court is an
improper or inconvenient forum for the resolution of such action.  The parties
further agree that the mailing by certified or registered mail, return receipt
requested, of any process required by any such court shall constitute valid and
lawful service of process against them, without necessity for service by any
other means provided by statute or rule of court.

          Section 19.17.  Execution in Counterparts.  To facilitate execution,
                          -------------------------
this Agreement may be executed in as many counterparts as may be required; and
it shall not be necessary that the signatures of, or on behalf of, each party,
or that the signatures of all Persons required to bind any party, appear on each
counterpart; but it shall be sufficient that the signature of, or on behalf of,
each party, or that the signatures of the Persons required to bind any party,
appear on one or more of the counterparts.  All counterparts shall collectively
constitute a single Agreement.  It shall not be necessary in making proof of
this Agreement to produce or account for more than a number of counterparts
containing the respective signatures of, or on behalf of, all of the parties
hereto.

[The remainder of this page left blank intentionally. Signature page follows.]

                                       56
<PAGE>

          IN WITNESS WHEREOF, the undersigned have executed this Agreement as of
the date first above written.

                              PPG INDUSTRIES, INC.

                              By /s/ Garry A. Goudy
                                -------------------
                                Its Vice President, ARG
                                   --------------------

                              APOGEE ENTERPRISES, INC.

                              By /s/ Robert G. Barbieri
                                -----------------------
                               Its Chief Financial Officer
                                  ------------------------

                                       57

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