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                                                                    EXHIBIT 10.8

SUNTRUST                                                         COMMERCIAL NOTE

BORROWER:               Decima Research

LOAN AMOUNT:            Four Million Dollars and no cents ($4,000,000.00)

BORROWER'S ADDRESS:     1363 Beverly Road
                        McLean, VA 22101-3603

OFFICER:                Mark E Wright (initials)          DATE: February 6, 2002

ACCOUNT NO:             0000088982 NOTE NO: 0000000042  NOTE TYPE: Original Loan

                                IMPORTANT NOTICE

THIS INSTRUMENT CONTAINS A CONFESSION OF JUDGMENT PROVISION WHICH CONSTITUTES A
WAIVER OF IMPORTANT RIGHTS YOU MAY HAVE AS A DEBTOR AND ALLOWS THE CREDITOR TO
OBTAIN A JUDGMENT AGAINST YOU WITHOUT ANY FURTHER NOTICE,

For value received, the undersigned (whether one or more) jointly and severally
promise to pay to the order of SunTrust Bank (the "Bank") at any of its offices,
or at such place as the Bank may designate in writing, without offset and in
immediately available funds, the Loan Amount shown above plus interest and any
other amounts due, upon the terms specified below.

LOAN TYPE AND REPAYMENT TERMS

LOAN TYPE:             Term - Variable Payment

REPAYMENT TERMS:       In 59 consecutive monthly installments of principal of
                       $66,666.67 each, plus interest, payable on the first day
                       of each month, beginning March 1, 2002, and a final
                       payment of $66,666.47 principal plus interest and any
                       other amounts owed due on February 1, 2007.

ADDITIONAL TERMS AND CONDITION

This Note is governed by additional terms and conditions contained in a
Commitment Letter between the undersigned and the Bank dated February 6, 2002,
and any modifications, renewals, extensions or replacements thereof (the
"Agreement"), which is incorporated in this Note by reference. In the event of
an inconsistency between any term or condition contained in this Note and in the
Agreement, such term or condition of the Agreement shall control.

INTEREST

Interest will accrue daily on an actual/360 basis (that is, on the actual number
of days elapsed over a year of 360 days).

Payments received by the Bank shall be applied in such order as determined by
the Bank, in its sole discretion, as permitted by law. Interest will accrue from
the date of this Note on the unpaid balance and will continue to accrue after
maturity, whether by acceleration or otherwise, until this Note is paid in full.
If this is a variable rate transaction, the interest rate is prospectively
subject to increase or decrease without prior notice, and if this is a
Term-Variable Payment loan, adjustments in the payment schedule will be made as
necessary. If this is a variable rate transaction which uses SunTrust Prime Rate
as the Index, the Index is subject to increase or decrease at the sole option of
the Bank.

Subject to the above, interest per annum payable on this Note (the "Rate") will
be the "Index" (as defined in this Note) plus a margin of 1.650%. The "Index"
shall be the one month LIBOR established by the British Bankers Association as
of 11:00 a.m. (London Time) on the first business day of each month as published
by an on-line information service, such as Bloomberg Financial Markets News
Services or any comparable reporting service selected by the Bank. The Rate
shall be adjusted on the first business day of the month. Adjustments to the
Rate shall be effective monthly beginning March 1, 2002 and on the same day or
each month thereafter.

COLLATERAL

Any collateral pledged to the Bank to secure any of the undersigned's existing
or future liabilities to the Bank shall secure this Note. To the extent
permitted by law, each of the undersigned grants to the Bank a security interest
in and a lien upon all deposits or investments maintained by the undersigned
with, and all indebtedness owed to the undersigned by, the Bank or any of its
affiliates.

This Note is also secured by the following collateral and proceeds thereof:

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All accounts, certificates of title, chattel paper, commercial tort claims,
deposit accounts, documents, equipment, financial assets, fixtures, general
intangibles, instruments, inventory, investment property, letter of credit
rights, promissory notes, supporting obligations, all goods represented by any
of the foregoing and all goods that may be reclaimed or repossessed from or
returned by account debtors and all proceeds and products thereof (as all such
terms are defined in the Uniform Commercial Code) owned by, and as more
particularly described in a Security Agreement by, Decima Research dated this
date.

All accounts, certificates of title, chattel paper, commercial tort claims,
deposit accounts, documents, equipment, financial assets, fixtures, general
intangibles, instruments, inventory, investment property, letter of credit
rights, promissory notes, supporting obligations, all goods represented by any
of the foregoing and all goods that may be reclaimed or repossessed from or
returned by account debtors and all proceeds and products thereof (as all such
terms are defined in the Uniform Commercial Code) owned by, and as more
particularly described in a Security Agreement by, The Wirthlin Group
International, L.L.C. dated this date.

All accounts, certificates of title, chattel paper, commercial tort claims,
deposit accounts, documents, equipment, financial assets, fixtures, general
intangibles, instruments, inventory, investment property, letter of credit
rights, promissory notes, supporting obligations, all goods represented by any
of the foregoing and all goods that may be reclaimed or repossessed from or
returned by account debtors and all proceeds and products thereof (as all such
terms are defined in the Uniform Commercial Code) owned by, and as more
particularly described in a Security Agreement by, Australasian Research
Strategies, LLC dated this date.

All accounts, certificates of title, chattel paper, commercial tort claims,
deposit accounts, documents, equipment, financial assets, fixtures, general
intangibles, instruments, inventory, investment property, letter of credit
rights, promissory notes, supporting obligations, all goods represented by any
of the foregoing and all goods that may be reclaimed or repossessed from or
returned by account debtors and all proceeds and products thereof (as all such
terms are defined in the Uniform Commercial Code) owned by, and as more
particularly described in a Security Agreement by, Wirthlin Worldwide Hong Kong,
LLC dated this date.

All shares of Wirthlin-Europe Limited owned by The Wirthlin Group International,
L.L.C. and pledged under a Security Agreement dated this date.

All shares of Australasian Research Strategies Pty. owned by Australasian
Research Strategies, LLC and pledged under a Security Agreement dated this date.

All shares of Wirthlin Worldwide Asia, PTE. Ltd. owned by Wirthlin Worldwide
Hong Kong, LLC and pledged under a Security Agreement dated this date.

All of this security is referred to collectively as the "Collateral." The
Collateral is security for the payment of this Note and any other liability
(including overdrafts and future advances) of the undersigned to the Bank,
however evidenced, now existing or hereafter incurred, matured or unmatured,
direct or indirect, absolute or contingent, several, joint, or joint and
several, including any extensions, modifications or renewals. The proceeds of
any Collateral may be applied against the liabilities of the undersigned to the
Bank in any order at the option of the Bank.

LOAN PURPOSE AND UPDATED FINANCIAL INFORMATION REQUIRED

The undersigned warrant and represent that the loan evidenced by this Note is
being made solely for the purpose of acquiring or carrying on a business,
professional or commercial activity or acquiring real or personal property as an
investment (other than a personal investment) or for carrying on an investment
activity (other than a personal investment activity). The undersigned agree to
provide to the Bank updated financial information, including, but not limited
to, tax returns, current financial statements in form satisfactory to the Bank,
as well as additional information, reports or schedules (financial or
otherwise), all as required by the Loan Agreement.

DEFAULT, ACCELERATION AND SETOFF

As used in this Note, the term "Event of Default" shall have the meaning given
such term in the Agreement. If an Event of Default occurs, or in the event of
non-payment of this Note in full at maturity, the entire unpaid balance of this
Note will, at the option of the Bank, become immediately due and payable,
without notice or demand. Upon the occurrence of an Event of Default, the Bank
will be entitled to interest on the unpaid balance at the stated Rate plus 2.00%
(the "Default Rate"), unless otherwise required by law, until paid in full. To
the extent permitted by law, if an Event of Default has occurred and is
continuing, the Bank will have the right, in addition to all other remedies
permitted by law, to set off the amount due under this Note or due under any
other obligation to the Bank against any and all accounts, whether checking or
savings or otherwise, credits, money, stocks, bonds or other security or
property of any nature on deposit with, held by, owed by, or in the possession
of, the Bank or any of its affiliates to the credit of or for the account of any
Party, without notice to or consent by any Party. The remedies provided in this
Note and any other agreement between the Bank and any Party are cumulative and
not exclusive of any provided by law.

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CAPITAL ADEQUACY

Should the Bank, after the date of this Note, determine that the adoption of any
law or regulation regarding capital adequacy, or any change in its
interpretation or administration, has or would have the effect of reducing the
Bank's rate of return under this Note to a level below that which the Bank could
have achieved but for the adoption or change, by an amount which the Bank
considers to be material, then, from time to time, 30 days after written demand
by the Bank, the undersigned shall pay to the Bank such additional amounts as
will compensate the Bank for the reduction. Each demand by the Bank will be made
in good faith and accompanied by a certificate claiming compensation under this
paragraph and stating the amounts to be paid to it and the basis for the
payment.

LATE CHARGES AND OTHER AUTHORIZED CHARGES

If any portion of a payment is at least ten (10) days past due, the undersigned
agree to pay a late charge of 5.00% of the amount which is past due. Unless
prohibited by applicable law, the undersigned agree to pay the fee established
by the Bank from time to time for returned checks if a payment is made on this
Note with a check and the check is dishonored for any reason after the second
presentment. In addition, as permitted by applicable law, the undersigned agree
to pay the following: (1) all reasonable expenses, including, without
limitation, all court or collection costs, and reasonable attorneys' fees,
whether suit be brought or not, incurred in collecting this Note; (2) if an
Event of Default has occurred and is continuing all reasonable costs incurred in
evaluating, preserving or disposing of any Collateral granted as security for
the payment of this Note, including the cost of any audits, appraisals,
appraisal updates, reappraisals or environmental inspections which the Bank from
time to time in its sole discretion may deem necessary; (3) any premiums for
property insurance purchased on behalf of the undersigned or on behalf of the
owner(s) of the Collateral pursuant to any security instrument relating to the
Collateral; (4) any reasonable expenses or reasonable costs incurred in
defending any claim arising out of the execution of this Note or the obligation
which it evidences, or otherwise involving the employment by the Bank of
attorneys with respect to this Note and the obligations it evidences; and (5)
any other charges permitted by applicable law. The undersigned agree to pay
these authorized charges on demand or, at the Bank's option, the charges may be
added to the unpaid balance of the Note and will accrue interest at the stated
Rate. Upon the occurrence of an Event of Default, interest will accrue at the
Default Rate.

WAIVERS

The undersigned and each other Party waive presentment, demand, protest, notice
of protest and notice of dishonor and waive all exemptions, whether homestead or
otherwise, as to the obligations evidenced by this Note. The undersigned and
each other Party waive any rights to require the Bank to proceed against any
other Party or person or any Collateral before proceeding against the
undersigned or any of them, or any other Party, and agree that without notice to
any Party and without affecting any Party's liability, the Bank, at any time or
times, may grant extensions of the time for payment or other indulgences to any
Party or permit the renewal or modification of this Note, or permit the
substitution, exchange or release of any Collateral for this Note and may add or
release any Party primarily or secondarily liable, except for any modification
to any Loan Document (as such term is defined in the Agreement, to which the
undersigned is a party and which requires the consent of the undersigned). The
undersigned and each other Party agree that the Bank may apply all monies made
available to it from any part of the proceeds of the disposition of any
Collateral or by exercise of the right of setoff either to the obligations under
this Note or to any other obligations of any Party to the Bank, as the Bank may
elect from time to time. The undersigned also waive any rights afforded to them
by Sections 49-25 and 49-26 of the Code of Virginia of 1950 as amended. TO THE
EXTENT LEGALLY PERMISSIBLE, THE UNDERSIGNED WAIVE ANY RIGHT TO TRIAL BY JURY IN
ANY LITIGATION RELATING TO TRANSACTIONS UNDER THIS NOTE, WHETHER SOUNDING IN
CONTRACT, TORT OR OTHERWISE.

JUDGMENT BY CONFESSION

The undersigned hereby duly constitute and appoint C. B. Bohannon or Andrzej
Koplewski as the true and lawful attorney-in-fact for them in any or all of
their names, place and stead, and upon the occurrence of an Event of Default, to
confess judgment against them, or any of them, in the Circuit Court for the
County of Fairfax, Virginia, upon this Note and all amounts owed hereunder,
including all reasonable costs of collection, reasonable attorneys' fees and
court costs, hereby ratifying and confirming the acts of said attorney-in-fact
as if done by themselves, expressly waiving benefit of any homestead or other
exemption laws.

SEVERABILITY, AMENDMENTS AND NO WAIVER BY BANK

Any provision of this Note which is prohibited or unenforceable will be
ineffective to the extent of the prohibition or unenforceability without
invalidating the remaining provisions of this Note. No amendment, modification,
termination or waiver of any provision of this Note, nor consent to any
departure by the undersigned from any term of this Note, will in any event be
effective unless it is in writing and signed by an authorized employee of the
Bank, and then the waiver or consent will be effective only in the specific
instance and for the specific purpose for which given. If the interest Rate is
tied to an external index and the index becomes unavailable during the term of
this loan, the Bank may designate a substitute index with notice to the
Borrower. No failure or delay on the part of the Bank to exercise

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any right, power or remedy under this Note may be construed as a waiver of the
right to exercise the same or any other right at any time.

LIABILITY, SUCCESSORS AND ASSIGNS AND CHOICE OF LAW

Each of the undersigned shall be jointly and severally obligated and liable on
this Note. This Note shall apply to and bind each of the undersigned's heirs,
personal representatives, successors and assigns and shall inure to the benefit
of the Bank, its successors and assigns. The undersigned agree that certain
material events and occurrences relating to this Note bear a reasonable
relationship to the Commonwealth of Virginia. The validity, terms, performance
and enforcement of this Note shall be governed by applicable federal law and the
internal laws of the Commonwealth of Virginia which are applicable to agreements
which are negotiated, executed, delivered and performed solely in the
Commonwealth of Virginia.

By signing below, the undersigned agree to the terms of this Note and
acknowledge receipt of a loan in the Loan Amount shown above.

                                                Decima Research.

                                                By: /s/ Joel A. White
                                                   ----------------------------

                                                Name:  Joel A. White
                                                Title: Chief Financial Officer

                                        4<PAGE>
                                                                     Exhibit 4.4

                          FIRST SUPPLEMENTAL INDENTURE

     FIRST SUPPLEMENTAL INDENTURE, dated as of August 27, 2004, among Ply Gem
Industries, Inc., a Delaware corporation (the "Company"), MWM Holding, Inc., a
Delaware corporation ("MWM Holding"), MW Manufacturers Corp., a Delaware
corporation ("MW Manufacturers"), MW Manufacturers, Inc., a Delaware corporation
("MW"), Patriot Manufacturing, Inc., a Delaware corporation ("Patriot"), Lineal
Technologies, Inc., a Delaware corporation ("Lineal"), and U.S. Bank National
Association, as trustee (the "Trustee").

     WHEREAS, the Company, its parent, Ply Gem Holdings, Inc., a Delaware
corporation ("Holdings"), its domestic subsidiaries, Great Lakes Window, Inc.,
an Ohio corporation, Kroy Building Products, Inc., a Delaware corporation,
Napco, Inc., a Delaware corporation, Napco Window Systems, Inc., a Delaware
corporation, Thermal-Gard, Inc., a Pennsylvania corporation, Variform, Inc., a
Missouri corporation, and the Trustee entered into an indenture dated as of
February 12, 2004 (the "Indenture") to provide for the issuance of the Company's
9% Senior Subordinated Notes due 2012;

     WHEREAS, on the date hereof, the Company has acquired all of the issued and
outstanding stock of MWM Holding and has become the indirect owner of all the
issued and outstanding stock of MW Manufacturers, MW, Patriot and Lineal, all
wholly-owned domestic subsidiaries of MWM Holding;

     WHEREAS, pursuant to Section 4.16 of the Indenture, MWM Holding, MW
Manufacturers, MW, Patriot and Lineal, as new Restricted Subsidiaries, are
required to enter into this Supplemental Indenture (the "Supplemental
Indenture") as Guarantors;

     WHEREAS, the Company, MWM Holding, MW Manufacturers, MW, Patriot and Lineal
and the Trustee are authorized to enter into this Supplemental Indenture;

     NOW, THEREFORE, for and in consideration of the premises and the mutual
covenants contained in this Supplemental Indenture and for other good and
valuable consideration, the receipt and sufficiency of which are herein
acknowledged, the Company, MWM Holding, MW Manufacturers, MW, Patriot and Lineal
and the Trustee hereby agree for the equal and the ratable benefit of all
Holders of the Notes as follows:

                                   ARTICLE I

                                   DEFINITIONS

     1.1 Definitions. For purposes of this Supplemental Indenture, the terms
defined in the recitals shall have the meanings therein specified; any terms
defined in the Indenture and not defined herein shall have the same meanings
herein as therein defined; and references to Articles or Sections shall, unless
the context indicates otherwise, be references to Articles or Sections of the
Indenture.

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                                   ARTICLE II

                    GUARANTEES OF NOTES AND OTHER PROVISIONS

     2.1 MWM Holding Guarantee.

         (a) MWM Holding hereby, jointly and severally with the other
Guarantors, unconditionally and irrevocably guarantees to each Holder of a Note
authenticated and delivered by the Trustee and to the Trustee and its successors
and assigns, irrespective of the validity and enforceability of the Indenture,
the Notes or the obligations of the Issuers or any other Guarantors to the
Holders or the Trustee hereunder or thereunder: (a) (x) the due and punctual
payment of the principal of, premium, if any, and interest on the Notes when and
as the same shall become due and payable, whether at maturity, upon redemption
or repurchase, by acceleration or otherwise, (y) the due and punctual payment of
interest on the overdue principal and (to the extent permitted by law) interest,
if any, on the Notes and (z) the due and punctual payment and performance of all
other obligations of the Issuers and all other obligations of the other
Guarantors (including under the Note Guarantees), in each case, to the Holders
or the Trustee hereunder or thereunder (including amounts due the Trustee under
Section 7.07 of the Indenture), all in accordance with the terms hereof and
thereof (collectively, the "Guarantee Obligations"); and (b) in case of any
extension of time of payment or renewal of any Notes or any of such other
obligations, the due and punctual payment and performance of Guarantee
Obligations in accordance with the terms of the extension or renewal, whether at
maturity, upon redemption or repurchase, by acceleration or otherwise. Failing
payment when due of any amount so guaranteed, or failing performance of any
other obligation of the Issuers to the Holders under the Indenture or under the
Notes, for whatever reason, MWM Holding shall be obligated to pay, or to perform
or cause the performance of, the same immediately. A Default under the Indenture
or the Notes shall constitute an event of default under the Note Guarantees, and
shall entitle the Holders of Notes to accelerate the obligations of MWM Holding
thereunder in the same manner and to the same extent as the obligations of the
Issuers.

         (b) MWM Holding, the Trustee and each Holder by its acceptance of a
Note hereby agrees that the Note Guarantee of MWM Holding provided hereunder
shall be subject to all terms, provisions and conditions in the Indenture that
relate to a Note Guarantee (including, without limitation, Article 11 of the
Indenture). MWM Holding further agrees to be bound by, and to comply with, all
provisions of the Indenture and Note Guarantee that are applicable to a
Guarantor that is a Restricted Subsidiary.

     2.2 MW Manufacturers Guarantee.

         (a) MW Manufacturers hereby, jointly and severally with the other
Guarantors, unconditionally and irrevocably guarantees to each Holder of a Note
authenticated and delivered by the Trustee and to the Trustee and its successors
and assigns, irrespective of the validity and enforceability of the Indenture,
the Notes or the obligations of the Issuers or any other Guarantors to the
Holders or the Trustee hereunder

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or thereunder: (a) (x) the due and punctual payment of the principal of,
premium, if any, and interest on the Notes when and as the same shall become due
and payable, whether at maturity, upon redemption or repurchase, by acceleration
or otherwise, (y) the due and punctual payment of interest on the overdue
principal and (to the extent permitted by law) interest, if any, on the Notes
and (z) the due and punctual payment and performance of all Guarantee
Obligations in accordance with the terms hereof and thereof; and (b) in case of
any extension of time of payment or renewal of any Notes or any of such other
obligations, the due and punctual payment and performance of Guarantee
Obligations in accordance with the terms of the extension or renewal, whether at
maturity, upon redemption or repurchase, by acceleration or otherwise. Failing
payment when due of any amount so guaranteed, or failing performance of any
other obligation of the Issuers to the Holders under the Indenture or under the
Notes, for whatever reason, MW Manufacturers shall be obligated to pay, or to
perform or cause the performance of, the same immediately. A Default under the
Indenture or the Notes shall constitute an event of default under the Note
Guarantees, and shall entitle the Holders of Notes to accelerate the obligations
of MW Manufacturers thereunder in the same manner and to the same extent as the
obligations of the Issuers.

         (b) MW Manufacturers, the Trustee and each Holder by its acceptance of
a Note hereby agrees that the Note Guarantee of MW Manufacturers provided
hereunder shall be subject to all terms, provisions and conditions in the
Indenture that relate to a Note Guarantee (including, without limitation,
Article 11 of the Indenture). MW Manufacturers further agrees to be bound by,
and to comply with, all provisions of the Indenture and Note Guarantee that are
applicable to a Guarantor that is a Restricted Subsidiary.

     2.3 MW Guarantee.

         (a) MW hereby, jointly and severally with the other Guarantors,
unconditionally and irrevocably guarantees to each Holder of a Note
authenticated and delivered by the Trustee and to the Trustee and its successors
and assigns, irrespective of the validity and enforceability of the Indenture,
the Notes or the obligations of the Issuers or any other Guarantors to the
Holders or the Trustee hereunder or thereunder: (a) (x) the due and punctual
payment of the principal of, premium, if any, and interest on the Notes when and
as the same shall become due and payable, whether at maturity, upon redemption
or repurchase, by acceleration or otherwise, (y) the due and punctual payment of
interest on the overdue principal and (to the extent permitted by law) interest,
if any, on the Notes and (z) the due and punctual payment and performance of all
Guarantee Obligations in accordance with the terms hereof and thereof; and (b)
in case of any extension of time of payment or renewal of any Notes or any of
such other obligations, the due and punctual payment and performance of
Guarantee Obligations in accordance with the terms of the extension or renewal,
whether at maturity, upon redemption or repurchase, by acceleration or
otherwise. Failing payment when due of any amount so guaranteed, or failing
performance of any other obligation of the Issuers to the Holders under the
Indenture or under the Notes, for whatever reason, MW shall be obligated to pay,
or to perform or cause the performance of, the same immediately. A Default under
the Indenture or the Notes shall constitute an event of default under the

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Note Guarantees, and shall entitle the Holders of Notes to accelerate the
obligations of MW thereunder in the same manner and to the same extent as the
obligations of the Issuers.

         (b) MW, the Trustee and each Holder by its acceptance of a Note hereby
agrees that the Note Guarantee of MW provided hereunder shall be subject to all
terms, provisions and conditions in the Indenture that relate to a Note
Guarantee (including, without limitation, Article 11 of the Indenture). MW
further agrees to be bound by, and to comply with, all provisions of the
Indenture and Note Guarantee that are applicable to a Guarantor that is a
Restricted Subsidiary.

     2.4 Patriot Guarantee.

         (a) Patriot hereby, jointly and severally with the other Guarantors,
unconditionally and irrevocably guarantees to each Holder of a Note
authenticated and delivered by the Trustee and to the Trustee and its successors
and assigns, irrespective of the validity and enforceability of the Indenture,
the Notes or the obligations of the Issuers or any other Guarantors to the
Holders or the Trustee hereunder or thereunder: (a) (x) the due and punctual
payment of the principal of, premium, if any, and interest on the Notes when and
as the same shall become due and payable, whether at maturity, upon redemption
or repurchase, by acceleration or otherwise, (y) the due and punctual payment of
interest on the overdue principal and (to the extent permitted by law) interest,
if any, on the Notes and (z) the due and punctual payment and performance of all
Guarantee Obligations in accordance with the terms hereof and thereof; and (b)
in case of any extension of time of payment or renewal of any Notes or any of
such other obligations, the due and punctual payment and performance of
Guarantee Obligations in accordance with the terms of the extension or renewal,
whether at maturity, upon redemption or repurchase, by acceleration or
otherwise. Failing payment when due of any amount so guaranteed, or failing
performance of any other obligation of the Issuers to the Holders under the
Indenture or under the Notes, for whatever reason, Patriot shall be obligated to
pay, or to perform or cause the performance of, the same immediately. A Default
under the Indenture or the Notes shall constitute an event of default under the
Note Guarantees, and shall entitle the Holders of Notes to accelerate the
obligations of Patriot thereunder in the same manner and to the same extent as
the obligations of the Issuers.

         (b) Patriot, the Trustee and each Holder by its acceptance of a Note
hereby agrees that the Note Guarantee of Patriot provided hereunder shall be
subject to all terms, provisions and conditions in the Indenture that relate to
a Note Guarantee (including, without limitation, Article 11 of the Indenture).
Patriot further agrees to be bound by, and to comply with, all provisions of the
Indenture and Note Guarantee that are applicable to a Guarantor that is a
Restricted Subsidiary.

     2.5 Lineal Guarantee.

         (a) Lineal hereby, jointly and severally with the other Guarantors,
unconditionally and irrevocably guarantees to each Holder of a Note

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authenticated and delivered by the Trustee and to the Trustee and its successors
and assigns, irrespective of the validity and enforceability of the Indenture,
the Notes or the obligations of the Issuers or any other Guarantors to the
Holders or the Trustee hereunder or thereunder: (a) (x) the due and punctual
payment of the principal of, premium, if any, and interest on the Notes when and
as the same shall become due and payable, whether at maturity, upon redemption
or repurchase, by acceleration or otherwise, (y) the due and punctual payment of
interest on the overdue principal and (to the extent permitted by law) interest,
if any, on the Notes and (z) the due and punctual payment and performance of all
Guarantee Obligations in accordance with the terms hereof and thereof; and (b)
in case of any extension of time of payment or renewal of any Notes or any of
such other obligations, the due and punctual payment and performance of
Guarantee Obligations in accordance with the terms of the extension or renewal,
whether at maturity, upon redemption or repurchase, by acceleration or
otherwise. Failing payment when due of any amount so guaranteed, or failing
performance of any other obligation of the Issuers to the Holders under the
Indenture or under the Notes, for whatever reason, Lineal shall be obligated to
pay, or to perform or cause the performance of, the same immediately. A Default
under the Indenture or the Notes shall constitute an event of default under the
Note Guarantees, and shall entitle the Holders of Notes to accelerate the
obligations of Lineal thereunder in the same manner and to the same extent as
the obligations of the Issuers.

         (b) Lineal, the Trustee and each Holder by its acceptance of a Note
hereby agrees that the Note Guarantee of Lineal provided hereunder shall be
subject to all terms, provisions and conditions in the Indenture that relate to
a Note Guarantee (including, without limitation, Article 11 of the Indenture).
Lineal further agrees to be bound by, and to comply with, all provisions of the
Indenture and Note Guarantee that are applicable to a Guarantor that is a
Restricted Subsidiary.

     2.6 Execution and Delivery of Note Guarantees. The delivery of any Note by
the Trustee, after the authentication thereof under the Indenture, shall
constitute due delivery of the Note Guarantees on behalf of MWM Holding, MW
Manufacturers, MW, Patriot or Lineal.

     2.7 Additional Notes. For avoidance of doubt, it is understood that on the
first Interest Payment Date for any Additional Notes, the interest payable in
respect of each $1,000.00 principal amount of such Additional Notes may, as
determined by the Issuer at the time of issuance of such Additional Notes, be
less than the interest payable in respect of each $1,000.00 principal amount of
the other outstanding Notes.

     2.8 No Personal Liability. No stockholder, officer, director, employee or
incorporator, past, present or future, of MWM Holding, MW Manufacturers, MW,
Patriot or Lineal, as such, shall have any personal liability under the Note
Guarantees of MWM Holding, MW Manufacturers, MW, Patriot or Lineal by reason of
his, her or its status as such stockholder, officer, director, employee or
incorporator.

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                                  ARTICLE III

                                  MISCELLANEOUS

     3.1 Effect of the Supplemental Indenture. This Supplemental Indenture
supplements the Indenture and shall be a part and subject to all the terms
thereof. Except as supplemented hereby, the Indenture and the Notes issued
thereunder shall continue in full force and effect.

     3.2 Counterparts. This Supplemental Indenture may be executed in
counterparts, each of which shall be deemed an original, but all of which shall
together constitute one and the same instrument.

     3.3 GOVERNING LAW. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

                                       6
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed on this 27th day of August, 2004.

                                      PLY GEM INDUSTRIES, INC.

                                      By:   /s/ Lee D. Meyer
                                         -----------------------------------
                                           Lee D. Meyer
                                           President and Chief Executive Officer

                                      MWM HOLDING, INC.

                                      By:    /s/ Lee D. Meyer
                                         -----------------------------------
                                           Lee D. Meyer
                                           Vice President

                                      MWM MANUFACTURERS, CORP.

                                      By:    /s/ Lee D. Meyer
                                         -----------------------------------
                                           Lee D. Meyer
                                           Vice President

                                      MW MANUFACTURERS, INC.

                                      By:    /s/ Lee D. Meyer
                                         -----------------------------------
                                           Lee D. Meyer
                                           Vice President

                                       7
<PAGE>

                                      PATRIOT MANUFACTURING, INC.

                                      By:    /s/ Lee D. Meyer
                                         -----------------------------------
                                           Lee D. Meyer
                                           Vice President

                                      LINEAL TECHNOLOGIES, INC.

                                      By:    /s/ Lee D. Meyer
                                         -----------------------------------
                                           Lee D. Meyer
                                           Vice President

                                       8
<PAGE>

                                      U.S. BANK NATIONAL ASSOCIATION,
                                      as Trustee

                                      By:    /s/ Richard Prokosch
                                         -------------------------------------
                                         Name: Richard Prokosch
                                         Title:  Vice President

                                       9

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