Document:

EX-4.1

 Exhibit 4.1 
 (FACE OF SECURITY) 
 THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER
REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF
ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE. 
 UNLESS THIS
CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO BANK OF MONTREAL, OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS
REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF
DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. 
 THIS SECURITY IS A MASTER NOTE WITHIN THE MEANING SPECIFIED HEREIN AND REPRESENTS AN INVESTMENT SECURITY WITHIN THE MEANING OF ARTICLE EIGHT OF THE NEW YORK UNIFORM COMMERCIAL CODE (“NY UCC”). THIS
SECURITY IS GOVERNED AND SUBJECT TO SECTION 8-202 OF THE NY UCC. THE TERMS OF THE SECURITIES OF ANY SERIES REPRESENTED HEREBY ARE INCORPORATED BY REFERENCE TO THE APPLICABLE PRICING SUPPLEMENT. BY ACCEPTANCE OF THIS SECURITY, THE HOLDER IS DEEMED TO
HAVE KNOWLEDGE OF SUCH TERMS AND TO HOLD SUCH SECURITIES SUBJECT TO AND IN ACCORDANCE WITH SUCH TERMS. 

 BANK OF MONTREAL 
 SENIOR MEDIUM-TERM NOTES, SERIES B 
 (MASTER NOTE) 

This Security will not constitute a deposit that is insured under 
 the Canada Deposit Insurance Corporation Act or by the 
 United States Federal Deposit Insurance
Corporation 
 This Security is a Global Security (as defined in Section 101 of the Indenture) and may represent one or more series
of the Securities as contemplated therein. Bank of Montreal is a Canadian chartered bank (hereinafter called the “Bank,” which term includes any successor Person under the Indenture). The terms for each series of Securities are
hereby reflected in this Security, the Bank’s prospectus dated June 22, 2011, as it may be supplemented by the prospectus supplement specified from time to time in the Distribution Agreement, dated June 22, 2011, as it may be
supplemented or amended from time to time (the “Prospectus”), relating to the Securities evidenced hereby, and in the pricing supplement(s) identified and noted by the Trustee on Annex A attached hereto (each such pricing
supplement, together with the Prospectus and any product supplement designated therein (if applicable), a “Pricing Supplement”), which Pricing Supplement(s) are on file with the Trustee. With respect to each issuance of Securities,
the description and terms of such Securities contained in the applicable Pricing Supplement are hereby incorporated by reference herein and are deemed to be a part of this Security as of the Original Issue Date specified on Annex A. Each reference
to “this Security” or a “Security of a series” includes and shall be deemed to refer to each Security of a series evidenced hereby that is referenced in a Pricing Supplement. For the avoidance of doubt, a Pricing Supplement may
bear a different name given to a similar document filed by the Bank under the Securities Act of 1933 pursuant to Rule 424(b) thereof. 

Every term of this Security is subject to modification, amendment, supplementation or elimination through the incorporated terms of the applicable
Pricing Supplement, whether or not the phrase “unless otherwise provided in the Pricing Supplement” or language of similar meaning precedes the term of this Security so modified, amended or eliminated. Without limiting the foregoing, in
the case of each Security of any series evidenced hereby, the Holder of this Security is directed to the applicable Pricing Supplement for a description of certain terms of such series, including the manner of determining the amount of cash payable
or (if applicable) securities or other assets deliverable at maturity or at any other time and the method of determining, and the dates (if any) for the payment and resetting of, interest or other interim payments, if any, on such series of the
Securities (including, without limitation, information relating to any applicable interest rate, relevant securities, currency, commodities, or other index or indices, any single security, currency or commodity or basket thereof of any combination
of the foregoing that may be relevant to such determination), the dates, if any, on which the principal amount of and interest, if any, on such series of the Securities is determined and payable, the amount payable upon any acceleration of such
series of the Securities and the principal amount of such series of the Securities and the principal amount of such series of the Securities deemed to be Outstanding for purposes of determining whether Holders of the requisite principal amount of
Securities have made or given any request, demand, authorization, direction, notice, consent, waiver or other action under the Indenture, including any limitation on the ability of the Holder to seek to collect amounts due hereunder. 

  
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 Other terms used in this Security that are not defined herein but that are defined in the Indenture
referred to in Section 1 on the reverse of this Security are used herein as defined therein. 
 This Security is a “Master
Note”, which term means a Security that provides for incorporation thereof the terms of each Series of Securities by reference to the applicable Pricing Supplements, substantially as contemplated herein. 

The Bank for value received, hereby promises to pay to CEDE & CO., or registered assigns, on each principal payment date, including each
amortization date, redemption date, repayment date or maturity date, as applicable and specified in the applicable Pricing Supplement and on each interest payment date and at maturity, the interest then due and payable, if any, as so specified in
the applicable Pricing Supplement. Unless otherwise set forth in the applicable Pricing Supplement, any premium and any such installment of interest that is overdue at any time shall also bear interest at the rate per annum at which the principal
then bears interest (to the extent that the payment of such interest shall be legally enforceable), from the date any such overdue amount first becomes due until it is paid or made available for payment. Notwithstanding the foregoing, interest on
any principal, premium or installment of interest that is overdue shall be payable on demand. 
 Unless otherwise set
forth in the applicable Pricing Supplement, any interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture, be paid to the Person in whose name this Security (or one or more
Predecessor Securities) is registered at the close of business on the 3rd
business day next preceding such Interest Payment Date (a “Regular Record Date”). Any interest not punctually so paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date and such
Defaulted Interest either may be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the
Trustee, notice whereof shall be given to the Holder of this Security not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities
exchange on which the Securities of the applicable series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in the Indenture. 

  
 3 

 Manner of Payment – U.S. Dollars 

Payment of any amount payable on any Security of any series represented hereby in U.S. dollars will be made at the office or agency of the Bank
maintained for that purpose in The City of New York (or at any other office or agency maintained by the Bank for that purpose) or by wire transfer as described in the next paragraph, against surrender of this Security in the case of any payment due
at Maturity (other than any payment of interest that first becomes due on an Interest Payment Date); provided, however, that subject to the next paragraph, payment of interest will be made by check mailed to the address of the Person
entitled thereto as such address shall appear in the Security Register. 
 Payment of any amount payable on any Security of any series
represented hereby in U.S. dollars will be made by wire transfer of immediately available funds to an account maintained by the payee with a bank located in the Borough of Manhattan, The City of New York, if (i) the principal of such Security
is at least $1,000,000 and (ii) the Holder entitled to receive such payment transmits a written request for such payment to be made in such manner to the Trustee at its Corporate Trust Office, Attention: Corporate Trust Services, and it is
received on or before the fifth Business Day before the day on which such payment is to be made; provided that, in the case of any such payment due at the Maturity of the principal hereof, other than any payment of interest that first becomes
due on an Interest Payment Date, subject to the section below entitled “Manner of Payment-Global Securities,” this Security must be surrendered at the office or agency of the Trustee maintained for that purpose in The City of New York (or
at any other office or agency maintained by the Trustee for that purpose) in time for the Paying Agent to make such payment in such funds in accordance with its normal procedures. Any such request made with respect to any payment on such Security of
any series payable to a particular Holder will remain in effect for all later payments on such Security payable to such Holder, unless such request is revoked on or before the fifth Business Day before a payment is to be made, in which case such
revocation shall be effective for such payment and all later payments. In the case of any payment of interest payable on an Interest Payment Date, such written request must be made by the Person who is the registered Holder of this Security on the
relevant Regular Record Date. The Bank will pay any administrative costs imposed by banks in connection with making payments by wire transfer with respect to this Security, but any present or future tax, duty, assessment or other governmental charge
imposed upon any payment will be borne by the Holder of this Security and may be deducted from the payment by the Bank or the Paying Agent. 
 Manner of Payment – Global Securities 
 Notwithstanding any provision of this
Security or the Indenture, the Bank may make any and all payments of principal and any premium and interest on this Security pursuant to the applicable procedures of the Depositary for this Security as permitted in Section 301 of the Indenture.
Notwithstanding the foregoing, whenever the provisions hereof require that this Security be surrendered against payment of the principal and any premium and interest, such surrender may be effected by means of an appropriate adjustment to Annex A
hereto to reflect the discharge of such payment, such an adjustment shall be made by the Trustee in a manner not inconsistent with the procedures of the Depositary, and in such circumstances this Security need not be surrendered. 

  
 4 

 Payments Due on a Business Day 

Notwithstanding any provision of this Security or the Indenture, where any Interest Payment Date, Redemption Date or Stated Maturity of any Security
shall not be a Business Day at any Place of Payment, then payment of interest or principal (and premium, if any) need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of Payment
with the same force and effect as if made on the Interest Payment Date, Redemption Date, Repayment Date, or at the Stated Maturity; provided, however, that no interest shall accrue for the period from and after such Interest Payment
Date, Redemption Date, Repayment Date or Stated Maturity, as the case may be, to the date of such payment. 
  

 
 Reference is hereby made
to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. 
 Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature, this Security shall not be entitled to any benefit under the Indenture or be
valid or obligatory for any purpose. 

  
 5 

 IN WITNESS WHEREOF, the Bank has caused this instrument to be duly executed. 

 

							
		 		 	BANK OF MONTREAL
				
		 		 	By	 	      

		 		 	Name:	 	Luke Seabrook
		 		 	Title:	 	Executive Managing Director and Head, Financial Products, BMO Capital Markets
				
		 		 	By	 	      

		 		 	Name:	 	Katharine M. Anderson
		 		 	Title:	 	Assistant Corporate Secretary
	
	 This is one of the Securities of the series designated herein and referred to in the Indenture.

			
		 		 	 WELLS FARGO BANK, NATIONAL ASSOCIATION,

as Trustee

				
	Dated:	 		 	By	 	      

		 		 		 	Authorized Signatory

  
  

 

  
 6 

 (Reverse of Security) 
  

	 	1.	Securities and Indenture 

 This
Security is one of a duly authorized issue of securities of the Bank (herein called the “Securities”) issued and to be issued in one or more series under a Senior Indenture, dated as of January 25, 2010 (herein called the
“Indenture”), between the Bank and Wells Fargo Bank, National Association, as Trustee (herein called the “Trustee,” which term includes any successor trustee under the Indenture), and reference is hereby made to the
Indenture for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Bank, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and
delivered. To the extent lawful, in the event of any conflict between the Indenture or this Security, and any Pricing Supplement, the Pricing Supplement shall prevail. 
  

	 	2.	Denominations 

 The Securities of any
series are issuable only in registered form without coupons in “Authorized Denominations,” which term shall have the following meaning. For each Security of any series having a principal amount payable in U.S. dollars, unless
otherwise specified on the face of this Security, the Authorized Denominations shall be $1,000 and multiples thereof. 
  

	 	3.	Redemption at the Bank’s Option 

Unless otherwise set forth in the applicable Pricing Supplement, a Security represented hereby shall not be redeemable at the option of the Bank
before the Maturity Date. In the event the Bank elects to redeem the Notes, notice will be given to registered holders in the manner specified in the applicable Pricing Supplement. 

In the event of redemption of this Security in part only, appropriate annotation of such partial redemption shall be made on Annex A. 

Unless otherwise set forth in the applicable Pricing Supplement, a sinking fund provision will not be applicable. 

 

	 	4.	Transfer and Exchange 

 As provided in
the Indenture and subject to certain limitations therein set forth, the transfer of a Security of any Series is registrable in the Security Register, upon surrender of a Security for registration of transfer at the office or agency of the Bank in
any place where the principal of and any premium and interest on any Security are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Bank and the Security Registrar duly executed by, the Holder
hereof or his or her attorney duly authorized in writing, and thereupon one or more new Securities of the same series and of like tenor, of Authorized Denominations and for the same aggregate principal amount, will be issued to the designated
transferee or transferees. 
 As provided in the Indenture and subject to certain limitations therein set forth, Securities of any Series
are exchangeable for a like aggregate principal amount of Securities of the same Series and of like tenor of a different Authorized Denomination, as requested by the Holder surrendering the same. 

  
 7 

 No service charge shall be made for any such registration of transfer or exchange, but the Bank may
require payment of a sum sufficient to cover any tax, duty, assessment or other governmental charge payable in connection therewith. 

Prior to due presentment of any Security for registration of transfer, the Bank, the Trustee and any agent of the Bank or the Trustee may treat the
Person in whose name a Security is registered as the owner hereof for all purposes, whether or not the Security be overdue, and neither the Bank nor the Trustee nor any such agent shall be affected by notice to the contrary. 

This Security shall be subject to the provisions of the Indenture relating to Global Securities, including the limitations in Section 305
thereof on transfers and exchanges of Global Securities. Any such exchange shall be recorded by the Trustee on Annex B hereto. 
 This
Security is a Master Note and may be exchanged at any time, solely upon the request of the Bank to the Trustee, for one or more Global Securities in the same aggregate principal amount, each of which may or may not be a Master Note, as requested by
the Bank. Any such exchange shall be recorded by the Trustee on Annex B hereto. Each such replacement Global Security that is a Master Note shall reflect such series of Securities that the Bank shall request. Each such replacement Global Security
that is not a Master Note shall represent one (and only one) Security as requested by the Bank, and such Global Security shall be appropriately modified so as to reflect the terms of such Security. 

 

	 	5.	Defeasance 

 The Indenture contains
provisions for defeasance at any time of the entire indebtedness of a Security or of any series of Securities or certain restrictive covenants and Events of Default with respect to a Security or a series of Securities, in each case upon compliance
with certain conditions set forth in the Indenture. Such provisions are applicable to a particular Security or series of Securities only to the extent specified in the applicable Pricing Supplement. 

 

	 	6.	Default 

 If an Event of Default with
respect to a Security of any series evidenced hereby shall occur and be continuing, the principal of such Securities plus any accrued and unpaid interest may be declared due and payable in the manner and with the effect provided in the Indenture.
Upon payment (i) of the amount of principal and any accrued and unpaid interest so declared due and payable and (ii) of interest on any overdue principal and overdue interest (in each case to the extent that payment of such interest shall
be legally enforceable), all of the Bank’s obligations in respect of the payment of the principal of and any interest on such Securities shall terminate. 
  

	 	7.	Remedies 

 If an Event of Default with
respect to Securities of any series evidenced hereby shall occur and be continuing, the principal of such Securities of a series may be declared due and payable in the manner and with the effect provided in the Indenture. 

  
 8 

 As provided in and subject to the provisions of the Indenture, the Holder of this Security shall not
have the right to institute any proceeding with respect to the Indenture or for the appointment of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing
Event of Default with respect to the Securities, the Holders of not less than 25% in principal amount of the Securities of such applicable series at the time Outstanding shall have made written request to the Trustee to institute proceedings in
respect of such Event of Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee shall not have received from the Holders of a majority in principal amount of Securities of such series at the time Outstanding a direction
inconsistent with such request, and shall have failed to institute any such proceeding, for 90 days after receipt of such notice, request and offer of indemnity. The foregoing shall not apply to any suit instituted by a Holder of this Security for
the enforcement of any payment of principal hereof or any premium or interest hereon on or after the respective due dates expressed herein. 
 No reference herein to the Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Bank, which is absolute and unconditional, to pay the principal of and any
premium and interest on this Security at the times, place and rate, and in the coin or currency, herein prescribed. 
  

	 	8.	Disclosure under the Interest Act (Canada) 

 For disclosure purposes under the Interest Act (Canada), whenever in the Securities of any series or the Indenture interest at a specified rate is to be calculated on the basis of a period less than a calendar
year, the yearly rate of interest to which such rate is equivalent is such rate multiplied by the actual number of days in the relevant calendar year and divided by the number of days in such period. 

 

	 	9.	Modification and Waiver 

 The
Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Bank and the rights of the Holders of the Securities of each series to be affected under the Indenture at
any time by the Bank and the Trustee with the consent of the Holders of a majority in principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains provisions permitting the Holders of
specified percentages in principal amount of the Securities of each series at the time Outstanding, on behalf of the Holders of all Securities of such series, to waive compliance by the Bank with certain provisions of the Indenture and certain past
defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the
registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security. 

  
 9 

	 	10.	Definitions 

 All terms used in this
Security that are defined in the Indenture shall have the meanings assigned to them in the Indenture. 
  

	 	11.	Governing Law 

 This Security and the
Indenture shall be governed by and construed in accordance with the laws of the State of New York. 

  
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 ANNEX A 
  

			                  		                  		                  		                  		                  		                  		                  		                  
	  	 	Pricing
Supplement
(Name and/or
Accession
Number)	  	CUSIP
Number and
Title of
Security	  	Initial
Principal
Amount of
Security	  	Original
Issue
Date	  	Decrease in
Principal
Amount	  	Increase in
Principal
Amount	  	Effective
Date of
Increase or
Decrease	  	Trustee
Notation

  
 A-1 

 ANNEX A 
  

			                  		                  		                  		                  		                  		                  		                  		                  
	  	 	Pricing
Supplement
(Name and/or
Accession
Number)	  	CUSIP
Number and
Title of
Security	  	Initial
Principal
Amount of
Security	  	Original
Issue
Date	  	Decrease in
Principal
Amount	  	Increase in
Principal
Amount	  	Effective
Date of
Increase or
Decrease	  	Trustee
Notation

  
 A-2 

 ANNEX B 
 The following exchanges of a part of this Global Security for physical certificates or part of another Global Security have been made: 

 

			                  		                  		                  		                  
	 Date of Exchange
	  	Amount of Decrease in
Principal Amount of
this Global Security	  	Amount of Increase in
Principal Amount of
this Global Security	  	Principal Amount of
this Global Security
following such
Decrease (or Increase)	  	Signature of
Authorized Signatory
of Trustee

  
 B-1 

 ANNEX C 
 ABBREVIATIONS 
 The following abbreviations, when used in the inscription on the face of this
Security, shall be construed as though they were written out in full according to applicable laws or regulations. 
 TEN COM — as
tenants in common 
 TEN ENT — as tenants by the entireties 
 JT TEN — as joint tenants with the right of survivorship and not as tenants in common 
 UNIF GIFT
MIN ACT —                                  Custodian
                                 

                        
                                (Cust)
                                    (Minor) 

under Uniform Gifts to Minors Act 
  

 
  

(State) 
 Additional abbreviations may
also be used 
 though not in the above list. 
  

 
  

  
 C-1 

 ANNEX C 
 ASSIGNMENT 
 FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) unto

  
  
 PLEASE INSERT SOCIAL SECURITY OR OTHER 
 IDENTIFYING NUMBER OF ASSIGNEE 

 
  
 /                                   
                                       /

  
  

 
  
 (Please Print or Typewrite Name and Address 
 Including Postal Zip Code of Assignee) 

 
  
 the attached Security and all rights thereunder, and hereby irrevocably constitutes and appoints 
  

 
  
 to transfer said Security on the books of the Bank, with full power of substitution in the premises. 
 Dated:
                             
 Signature Guaranteed 
  

					
			
	  
 NOTICE: Signature must be
guaranteed.
	  	  
 NOTICE: The signature to
this assignment must correspond with the name of the Holder as written upon the face of the attached Security in every particular, without alteration or enlargement or any change whatever.
	  	

  
 C-2EX-4.1

 Exhibit 4.1 
 THIRD SUPPLEMENTAL INDENTURE 
 Dated as of October 22, 2012 

Among 
 OWENS
CORNING, 
 As Issuer 
 Each of the SUBSIDIARY GUARANTORS party hereto 
 and 

WELLS FARGO BANK, NATIONAL ASSOCIATION, 
 As Trustee 
 4.200% Senior Notes Due 2022 

 THIS THIRD SUPPLEMENTAL INDENTURE (the “Third Supplemental Indenture”),
dated as of October 22, 2012, among OWENS CORNING, a Delaware corporation (“Company”), the SUBSIDIARY GUARANTORS listed on the signature pages hereto (“Subsidiary Guarantors”), and WELLS FARGO BANK, NATIONAL
ASSOCIATION, a national banking association duly incorporated and existing under the laws of the United Sates of America, as Trustee (“Trustee”). 
 W I T N E S S E T H: 
 WHEREAS, the Company, certain Subsidiary Guarantors and the
Trustee have heretofore executed and delivered an Indenture, dated as of June 2, 2009 (the “Original Indenture”) (as supplemented by that certain First Supplemental Indenture, dated as of June 8, 2009, and as supplemented
by that certain Second Supplemental Indenture, dated as of May 26, 2010, and as hereby further supplemented, the “Indenture”), providing for the issuance from time to time of one or more series of the Company’s Securities;

 WHEREAS, pursuant to the terms of the Indenture, the Company desires to provide for the establishment of a series of
Securities to be designated as the “4.200% Senior Notes due 2022” (herein referred to as the “2022 Notes”), the form and substance of the 2022 Notes and the terms, provisions and conditions thereof to be set forth
as provided in the Original Indenture and this Third Supplemental Indenture; 
 WHEREAS, Section 2.03 of the Original
Indenture provides that various matters with respect to any series of Securities issued under the Indenture may be established in a supplemental indenture to the Indenture; 
 WHEREAS, Section 9.01(vii) of the Original Indenture provides that the Company and the Trustee may enter into a supplemental indenture to the Indenture to establish the form or terms of Securities of
any series as permitted by the Original Indenture; 
 WHEREAS, Section 9.01(iv) of the Original Indenture provides that the
Company and the Trustee may enter into a supplemental indenture to change or eliminate any of the provisions of the Indenture with respect to any series of Securities (other than any outstanding Securities of any series to which such modification
would apply); and 
 WHEREAS, all acts and things necessary to make this Third Supplemental Indenture, when duly executed and
delivered, a valid, binding and legal instrument in accordance with its terms and for the purposes herein expressed, have been done and performed; and the execution and delivery of this Third Supplemental Indenture have been in all respects duly
authorized. 
 NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt
whereof is hereby acknowledged, it is agreed by and among the Company, the Subsidiary Guarantors, and the Trustee as follows: 

  
 1 

 ARTICLE ONE 
 Relation to Indenture; Additional Definitions 
 1.01 Relation to
Indenture. This Third Supplemental Indenture constitutes an integral part of the Indenture. 
 1.02 Additional
Definitions. For all purposes of this Third Supplemental Indenture, capitalized terms used herein shall have the respective meanings specified below or in the Original Indenture, as the case may be. 

“Beneficial Owner” has the meaning assigned to such term in Rule 13d-3 and Rule 13d-5 under the Exchange
Act, except that in calculating the beneficial ownership of any particular “person” (as that term is used in Section 13(d)(3) of the Exchange Act), such “person” will be deemed to have beneficial ownership of all securities
that such “person” has the right to acquire by conversion or exercise of other securities, whether such right is currently exercisable or is exercisable only after the passage of time. The terms “Beneficially Owns” and
“Beneficially Owned” have a corresponding meaning. 
 “Change of Control” means the
occurrence of any of the following: 
 1) the direct or indirect sale, lease, transfer, conveyance or other
disposition (other than by way of merger or consolidation), in one or a series of related transactions, of all or substantially all of the properties or assets of the Company and its Subsidiaries taken as a whole to any “person” (as that
term is used in Section 13(d) of the Exchange Act); 
 2) the adoption of a plan relating to the liquidation
or dissolution of the Company; 
 3) the consummation of any transaction (including, without limitation, any
merger or consolidation), the result of which is that any “person” (as defined above) becomes the Beneficial Owner, directly or indirectly, of more than 50% of the Voting Stock of the Company, measured by voting power rather than number of
shares; or 
 4) the first day on which a majority of the members of the Board of Directors of the Company are
not Continuing Directors. 
 “Change of Control Offer” has the meaning set forth in
Section 2.11(a). 
 “Change of Control Payment” has the meaning set forth in
Section 2.11(a). 
 “Change of Control Payment Date” has the meaning set forth in
Section 2.11(a)(2). 
 “Change of Control Repurchase Event” means the occurrence of a
Change of Control and a Ratings Downgrade. 
 “Comparable Treasury Issue” means the United
States Treasury security selected 

  
 2 

 
by the Quotation Agent as having a maturity comparable to the remaining term of the 2022 Notes to be redeemed that would be utilized, at the time of selection and in accordance with customary
financial practice, in pricing new issues of corporate notes of comparable maturity to the remaining term of the 2022 Notes. 
 “Comparable Treasury Price” means, with respect to any redemption date, (1) the average of four Reference Treasury Dealer Quotations for such redemption date, after excluding the
highest and lowest such Reference Treasury Dealer Quotations, or (2) if the Quotation Agent obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such quotations. 

“Continuing Directors” means, as of any date of determination, any member of the Board of Directors of
the Company who: 
 1) was a member of such Board of Directors on the date of the indenture; or 

2) was nominated for election or elected to such Board of Directors with the approval of a majority of the Continuing
Directors who were members of such Board of Directors at the time of such nomination or election. 

“Global Notes” has the meaning set forth in Section 2.07(a). 

“Interest Payment Dates” means June 15 and December 15 of each year, or if any such day is not
a Business Day, the next succeeding Business Day, until maturity, beginning on June 15, 2013. 

“Maturity Date” has the meaning set forth in Section 2.03. 

“Notation of Guarantee” has the meaning set forth in Section 2.08. 

“Note Registrar” means Wells Fargo Bank, National Association, hereby appointed as an agency of the
Company in accordance with Section 2.05 of the Indenture. 
 “Optional Redemption Date”
means September 15, 2022. 
 “Original Indenture” has the meaning set forth in the first
paragraph of the Recitals hereof. 
 “Quotation Agent” means a Reference Treasury Dealer
appointed by the Company. 
 “Rating Agency” means each of Moody’s Investors Service Inc.
and Standard & Poor’s Ratings Services, a division of The McGraw-Hill Companies, Inc., or any of their successors. 
 “Ratings Downgrade” means when, at the time of a Change of Control, the 2022 Notes carry: 

  
 3 

 1) an investment grade credit rating (BBB-/Baa3, or equivalent, or better)
from both Rating Agencies, and such rating from both Rating Agencies is within 60 days of the occurrence of the Change of Control (which period shall be extended so long as the rating of the 2022 Notes is under publicly announced consideration for
possible downgrade by either Rating Agency) either downgraded to a non-investment grade credit rating (BB+/Ba1 or equivalent, or worse) or withdrawn and is not within such period subsequently (in the case of a downgrade) upgraded to an investment
grade credit rating or (in the case of a withdrawal) replaced by an investment grade credit rating; 
 2) a
non-investment grade credit rating (BB+/Ba1, or equivalent, or worse) from both Rating Agencies, and such rating from both Rating Agencies is within 60 days of the occurrence of the Change of Control (which period shall be extended so long as the
rating of the 2022 Notes is under publicly announced consideration for possible downgrade by either Rating Agency) downgraded by one or more notches (for illustration, Ba1 to Ba2 being one notch) and is not within such period subsequently upgraded
to its earlier credit rating or better by both Rating Agencies; 
 3) both (A) an investment grade credit
rating (BBB-/Baa3, or equivalent, or better) from one Rating Agency, and such rating is within 60 days of the occurrence of the Change of Control (which period shall be extended so long as the rating of the 2022 Notes is under publicly announced
consideration for possible downgrade by either Rating Agency) either downgraded to a non-investment grade credit rating (BB+/Ba1, or equivalent, or worse) or withdrawn and is not within such period subsequently (in the case of a downgrade) upgraded
to an investment grade credit rating by such Rating Agency or (in the case of a withdrawal) replaced by an investment grade credit rating from such Rating Agency and (B) a non-investment grade credit rating (BB+/Ba1, or equivalent, or worse)
from one Rating Agency, and such rating is within 60 days of the occurrence of the Change of Control (which period shall be extended so long as the rating of the 2022 Notes is under publicly announced consideration for possible downgrade by either
Rating Agency) downgraded by one or more notches (for illustration, Ba1 to Ba2 being one notch) and is not within such period subsequently upgraded to its earlier credit rating or better by such Rating Agency; 

4) both (A) an investment grade credit rating (BBB-/Baa3, or equivalent, or better) from one Rating Agency, and such
rating is within 60 days of the occurrence of the Change of Control (which period shall be extended so long as the rating of the 2022 Notes is under publicly announced consideration for possible downgrade by either Rating Agency) either downgraded
to a non-investment grade credit rating (BB+/Ba1, or equivalent, or worse) or withdrawn and is not within such period subsequently (in the case of a downgrade) upgraded to an investment grade credit rating by such Rating Agency or (in the case of a
withdrawal) replaced by an investment grade credit rating from such Rating Agency and (B) no credit rating from one Rating Agency, and such Rating Agency does not assign within 60 days of the occurrence of the Change of

  
 4 

 
Control an investment grade credit rating to the 2022 Notes; 
 5) both (A) a non-investment grade credit rating (BB+/Ba1, or equivalent, or worse) from one Rating Agency, and such rating is within 60 days of the occurrence of the Change of Control (which period
shall be extended so long as the rating of the 2022 Notes is under publicly announced consideration for possible downgrade by either Rating Agency) downgraded by one or more notches (for illustration, Ba1 to Ba2 being one notch) and is not within
such period subsequently upgraded to its earlier credit rating or better by such Rating Agency and (B) no credit rating from one Rating Agency, and such Rating Agency does not assign within 60 days of the occurrence of the Change of Control an
investment grade credit rating to the 2022 Notes; or 
 6) no credit rating from either Rating Agency and both
Rating Agencies do not assign within 60 days of the occurrence of the Change of Control an investment grade credit rating to the 2022 Notes; 
 and in making the relevant decision(s) referred to above to downgrade or withdraw such ratings, as applicable, the relevant Rating Agency announces publicly or confirms in writing to the Company that such
decision(s) resulted, in whole or in part, from the occurrence of the Change of Control. 
 “Reference
Treasury Dealer” means (i) each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and a Primary Treasury Dealer (as defined herein) selected by Wells Fargo
Securities, LLC, or their respective successors or affiliates, and at least one other primary U.S. Government securities dealer in New York City (a “Primary Treasury Dealer”) selected by the Company; provided, however, that if any
of the foregoing shall cease to be a Primary Treasury Dealer, the Company will substitute therefor another Primary Treasury Dealer; and (ii) any other Primary Treasury Dealer selected by the Company. 

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any
redemption date, the average, as determined by the Company, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Quotation Agent by such Reference
Treasury Dealer at 5:00 p.m., New York City time, on the third Business Day preceding such redemption date. 

“Treasury Rate” means, with respect to any redemption date, the rate per annum equal to the semi-annual
equivalent yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date. 

“2022 Notes” has the meaning set forth in the second paragraph of the Recitals hereof. 

All references herein to Articles, Sections or Exhibits, unless otherwise specified, refer to the corresponding Articles, Sections or
Exhibits of this Third Supplemental Indenture. The terms “herein,” “hereof,” “hereunder” and other words of similar import refer to this Third Supplemental Indenture. 

  
 5 

 ARTICLE TWO 
 The Series of Notes 
 2.01 Title of the Notes. The 2022 Notes shall
be designated as the “4.200% Senior Notes due 2022.” 
 2.02 Limitation on Aggregate Principal Amount. The
aggregate principal amount of 2022 Notes that may initially be outstanding shall not exceed $600,000,000. 
 2.03 Stated
Maturity. The stated maturity of the 2022 Notes shall be December 15, 2022 (the “Maturity Date”). 

2.04 Interest and Interest Rate. 
 (a) The 2022 Notes shall bear interest at the rate of 4.200% per annum, from and including their Original Issue Date of October 22, 2012, or from the most recent Interest Payment Date on which
interest has been paid or provided for, but excluding, the Maturity Date. Such interest shall be payable semiannually in arrears, on the Interest Payment Dates of June 15 and December 15 in each year, commencing on June 15, 2013.
Interest accrued on the 2022 Notes from the last Interest Payment Date before the Maturity Date shall be payable on the Maturity Date. 
 (b) The interest so payable on any Interest Payment Date shall be paid to the Persons in whose names the 2022 Notes are registered at the close of business on the record date for such Interest Payment
Date, being the immediately preceding June 1 and December 1, as the case may be, whether or not such day is a Business Day. 
 (c) The Company will pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue principal and premium, if any, from time to time on demand at a rate that is
1% per annum in excess of 4.200% to the extent lawful; it will pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of interest (without regard to any applicable grace periods) from
time to time on demand at a rate that is 1% per annum in excess of 4.200% to the extent lawful. 
 2.05 Place of
Payment. The place or places where the principal of and interest on the 2022 Notes shall be payable is the office or agency of the Company maintained for such purpose, which shall initially be the Corporate Trust Office of the Trustee, and any
other place or places designated by the Company pursuant to the Indenture, provided that while the 2022 Notes are represented by one or more Registered Global Securities registered in the name of the Depositary, or its nominee, the Company will
cause payments of principal and interest on such Registered Global Securities to be made to the Depositary or its nominee, as the case may be, by wire transfer to the extent, in the funds and in the manner required by agreements with, or regulations
or procedures prescribed from time to time by the Depositary or its nominee, and otherwise in accordance with such agreements, regulations or procedures. 

  
 6 

 2.06 Place of Registration or Exchange; Notices and Demands With Respect to the
2022 Notes. The place where the Holders of the 2022 Notes may present the 2022 Notes for registration of transfer or exchange and may make notices and demands to or upon the Company in respect of the 2022 Notes shall be the Corporate
Trust Office of the Trustee. 
 2.07 Global Notes. 

(a) The 2022 Notes shall be issuable in whole or in part in the form of one or more global notes (the “Global Notes”) in
definitive, full registered, book-entry form, without interest coupons, only in denominations of $2,000 and integral multiples of $1,000 in excess of $2,000. The Global Notes shall be deposited on their Original Issue Date with, or on behalf of, the
Depositary. 
 (b) The Depository Trust Company (“DTC”) shall initially serve as Depositary with respect to the
Global Notes. Such Global Notes shall bear the legend set forth in the form of 2022 Notes attached as Exhibit A. 
 2.08
Form of Securities. The Global Notes shall be substantially in the form attached as Exhibit A. The notation of the Note Guarantee of each Subsidiary Guarantor (the “Notation of Guarantee”) shall be substantially in the
form attached as Exhibit B. 
 2.09 Note Registrar. The Trustee shall initially serve as the Note Registrar for the
2022 Notes. 
 2.10 Sinking Fund Obligations. The Company shall have no obligation to redeem or purchase any 2022 Notes
pursuant to any sinking fund or analogous requirement. 
 2.11 Offer to Repurchase Upon Change of Control Repurchase
Event. 
 (a) Upon the occurrence of a Change of Control Repurchase Event, the Company will make an offer (a “Change
of Control Offer”) to each Holder of the 2022 Notes to repurchase all or any part (equal to $2,000 or integral multiples of $1,000 in excess of $2,000) of that Holder’s 2022 Notes at a purchase price in cash equal to 101% of the
aggregate principal amount of 2022 Notes repurchased plus accrued and unpaid interest on the 2022 Notes repurchased to the date of repurchase, subject to the rights of Holders of the 2022 Notes on the relevant record date to receive interest due on
the relevant interest payment date (the “Change of Control Payment”). Within 30 days following any Change of Control Repurchase Event, the Company will mail or deliver in accordance with DTC procedures a notice to each Holder and
the Trustee describing the transaction or transactions that constitute the Change of Control Repurchase Event and stating: 
 (1) that the Change of Control Offer is being made pursuant to this section of the Third Supplemental Indenture and that all 2022 Notes tendered will be accepted for payment; 

(2) the purchase price and the purchase date, which shall be no earlier than 30 days and no later than 60 days from the
date such notice is mailed (the “Change of Control Payment Date”); 

  
 7 

 (3) that any 2022 Note not tendered will continue to accrue interest;

 (4) that, unless the Company defaults in the payment of the Change of Control Payment, all 2022 Notes accepted
for payment pursuant to the Change of Control Offer will cease to accrue interest after the Change of Control Payment Date; 
 (5) that Holders electing to have any 2022 Notes purchased pursuant to a Change of Control Offer will be required to surrender the 2022 Notes, with the form entitled “Option of Holder to Elect
Purchase” attached to the 2022 Notes completed, or transfer by book-entry transfer, to the Paying Agent at the address specified in the notice prior to the close of business on the third Business Day preceding the Change of Control Payment
Date; 
 (6) that Holders of the 2022 Notes will be entitled to withdraw their election if the Paying Agent
receives, not later than the close of business on the second Business Day preceding the Change of Control Payment Date, a telegram, telex, facsimile transmission or letter setting forth the name of such Holder, the principal amount of 2022 Notes
delivered for purchase, and a statement that such Holder is withdrawing his election to have the 2022 Notes purchased; and 
 (7) that Holders whose 2022 Notes are being purchased only in part will be issued new 2022 Notes equal in principal amount to the unpurchased portion of the 2022 Notes surrendered, which unpurchased
portion must be equal to $2,000 in principal amount or an integral multiple of $1,000 in excess of $2,000. 
 The Company will
comply with the requirements of Rule 14e-1 under the Exchange Act and any other securities laws and regulations thereunder to the extent those laws and regulations are applicable in connection with the repurchase of the 2022 Notes as a result of a
Change of Control Repurchase Event. To the extent that the provisions of any securities laws or regulations conflict with the provisions of this Section 2.11, the Company will comply with the applicable securities laws and regulations and will
not be deemed to have breached its obligations under this Section 2.11 by virtue of such compliance. 
 (b) On the Change of
Control Payment Date, the Company will, to the extent lawful: 
 (1) accept for payment all the 2022 Notes or
portions of the 2022 Notes properly tendered pursuant to the Change of Control Offer; 
 (2) deposit with the
Paying Agent an amount equal to the Change of Control Payment in respect of all the 2022 Notes or portions of the 2022 Notes properly tendered; and 
 (3) deliver or cause to be delivered to the Trustee the 2022 Notes properly accepted together with an Officers’ Certificate stating the aggregate principal amount of the 2022 Notes or portions of the
2022 Notes being purchased by the Company. 
 The Paying Agent will promptly mail (but in any case not later than five days
after the Change of Control Payment Date) to each Holder of the 2022 Notes properly tendered the 

  
 8 

 
Change of Control Payment for such 2022 Notes, and the Trustee will promptly authenticate and mail (or cause to be transferred by book entry) to each Holder a new 2022 Note equal in principal
amount to any unpurchased portion of the 2022 Notes surrendered, if any. The Company will publicly announce the results of the Change of Control Offer on or as soon as practicable after the Change of Control Payment Date. 

(c) Notwithstanding anything to the contrary herein, the Company will not be required to make a Change of Control Offer upon a Change of
Control Repurchase Event if a third party makes the Change of Control Offer in the manner, at the times and otherwise in compliance with the requirements set forth herein and purchases all 2022 Notes properly tendered and not withdrawn under
the Change of Control Offer. 
 2.12 Other Terms. The provisions of Article Three and Article Four shall apply to the 2022
Notes as set forth therein. 
 ARTICLE THREE 
 Optional Redemption of the 2022 Notes 
 3.01 Redemption Price Prior to
the Optional Redemption Date. The Company shall have the right to redeem the 2022 Notes, at its option, in whole at any time or in part from time to time. If the Company redeems the 2022 Notes prior to the Optional Redemption Date, the Company
shall pay a redemption price equal to the greater of: 
 (a) 100% of the principal amount of the 2022 Notes to be redeemed; and

 (b) as determined by the Quotation Agent, the sum of the present values of the remaining scheduled payments of principal and
interest on the 2022 Notes being redeemed (excluding any portion of such payments of interest accrued as of the date of redemption), discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day
months) at the Treasury Rate, plus 35 basis points; 
 plus, in each case, accrued and unpaid interest thereon to, but not
including, the redemption date. 
 3.02 Redemption Price On or After the Optional Redemption Date. At any time on or after
the Optional Redemption Date, the Company shall have the right to redeem the 2022 Notes, at its option, in whole at any time or in part from time to time, at a redemption price of 100% of the principal amount of the 2022 Notes to be redeemed, plus
accrued and unpaid interest thereon to, but not including, the redemption date. 
 ARTICLE FOUR 

Modification of Section 4.10 of the Original Indenture 

Section 4.10 of the Original Indenture is hereby amended and restated solely with respect to the 2022 Notes and any other series of
Securities issued pursuant to the Indenture after the date hereof (such affected Securities, the “Affected Securities”) (but, for the avoidance of doubt, 

  
 9 

 
not with respect to any series of Securities issued under the Indenture prior to the date hereof (each, an “Outstanding Series”) or any additional Securities of an Outstanding
Series issued under the Indenture after the date hereof) as follows, and all references in the Original Indenture to Section 4.10 thereof and to the provisions specified therein shall, with respect to the 2022 Notes and each other Affected
Security, be deemed to be references to this Article Four and to the provisions specified herein, respectively: 

“Section 4.10. Corporate Existence. Subject to Article 5 hereof, the Company shall do or cause to be
done all things necessary to preserve and keep in full force and effect: 
 (a) its corporate existence, and the
corporate, partnership or other existence of each of its Subsidiaries, in accordance with the respective organizational documents (as the same may be amended from time to time) of the Company or any such Subsidiary; and 

(b) the rights (charter and statutory), licenses and franchises of the Company and its Subsidiaries; 

provided, however, that the Company shall not be required to preserve any such right, license or franchise, or the corporate, partnership
or other existence of any of its Subsidiaries, if the Company shall determine that the preservation thereof is no longer desirable in the conduct of the business of the Company and its Subsidiaries, taken as a whole, and that the loss thereof is not
adverse in any material respect to the Holders of the Securities.” 
 ARTICLE FIVE 

Miscellaneous Provisions 
 5.01 The Indenture, as supplemented by this Third Supplemental Indenture, is in all respects hereby adopted, ratified and confirmed. 

5.02 This Third Supplemental Indenture may be executed in any number of counterparts, each of which shall be an original, but such
counterparts shall together constitute but one and the same instrument. 
 5.03 THIS THIRD SUPPLEMENTAL INDENTURE AND EACH 2022
NOTE SHALL BE GOVERNED BY AND DEEMED TO BE A CONTRACT MADE UNDER, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
CONFLICTS OF LAWS PRINCIPLES THEREOF. 
 5.04 If any provision in this Third Supplemental Indenture limits, qualifies or
conflicts with another provision hereof that is required to be included herein by any provisions of the Trust Indenture Act, such required provision shall control. 

  
 10 

 5.05 In case any provision in this Third Supplemental Indenture or the 2022 Notes shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 
 5.06 The recitals contained herein shall be taken as the statements of the Company, and the Trustee assumes no responsibility for their correctness. The Trustee makes no representations as to the proper
authorization or due execution hereof or of the 2022 Notes by the Company or the Subsidiary Guarantors or as to the validity or sufficiency of this Third Supplemental Indenture, any Notation of Guarantee or the 2022 Notes. The Trustee shall not be
accountable for the use or application by the Company of the 2022 Notes or the proceeds of the 2022 Notes. 

*    *    *    * 

  
 11 

 IN WITNESS WHEREOF, the parties hereto have caused this Third Supplemental Indenture to be
duly executed as of the day and year first above written. 
  

			
	OWENS CORNING
		
	 By:
	 	/s/ Michael McMurray
	Name:	 	Michael McMurray
	Title:	 	Senior Vice President and Chief Financial Officer
		
	 By:
	 	/s/ John Christy
	 Name:
	 	John W. Christy
	 Title:
	 	Senior Vice President,
		 	General Counsel and Secretary
	
	CDC CORPORATION,
	ENGINEERED PIPE SYSTEMS, INC.,
	 ERIC COMPANY,

	IPM INC.,
	OCCV1, INC.,
	OCCV2, LLC,
	OWENS CORNING COMPOSITE MATERIALS, LLC,
	OWENS CORNING CONSTRUCTION SERVICES, LLC,
	 OCV INTELLECTUAL CAPITAL, LLC,

OWENS CORNING FOAM INSULATION, LLC,

OWENS CORNING FRANCHISING, LLC,

OWENS-CORNING FUNDING CORPORATION,

OWENS CORNING HOMEXPERTS, INC.,

	 OWENS CORNING HT, INC.,

OWENS CORNING INSULATING SYSTEMS, LLC,

OWENS CORNING INTELLECTUAL CAPITAL, LLC,

OWENS CORNING ROOFING AND ASPHALT, LLC,

	 OWENS CORNING SALES, LLC,

	 OWENS CORNING SCIENCE AND TECHNOLOGY, LLC,

	 OWENS CORNING U.S. HOLDINGS, LLC, and SOLTECH, INC.

		
	 By:
	 	/s/ Joseph J. Mikelonis
	 Name:
	 	Joseph J. Mikelonis
	 Title:
	 	Authorized Signatory

 Supplemental Indenture 

 
			
	 OC CANADA HOLDINGS GENERAL PARTNERSHIP

by OC CANADA HOLDINGS COMPANY, its Managing Partner

		
	 By:
	 	/s/ Melissa M. Gleespen
	 Name:
	 	Melissa M. Gleespen
	 Title:
	 	Authorized Signatory

 Supplemental Indenture 

 
			
	WELLS FARGO BANK, NATIONAL ASSOCIATION, as Trustee
		
	 By:
	 	/s/ Gregory S. Clarke
	Name:	 	Gregory S. Clarke
	 Title:
	 	Vice President

 Supplemental Indenture 

 Exhibit A 

FORM OF NOTE CERTIFICATE 
 CUSIP/CINS                         

4.200% Senior Notes due 2022 
  

					
	 No.
	  	$	 	  

 Owens Corning 
 promises to pay to Cede & Co., or registered assigns, 
 the principal sum
of                                         
            on October 22, 2022. 
 Interest Payment Dates: June 15 and
December 15 
 Record Dates: June 1 and December 1 
 Dated: 
  

			
	 Owens Corning

		
	 By:
	 	 
	 Name:
	 	
	 Title:
	 	

 This is one of the Securities referred to 
 in the within-mentioned Indenture: 
  

			
	 WELLS FARGO BANK, NATIONAL

ASSOCIATION,
     as Trustee

		
	 By:
	 	 
		 	Authorized Signatory

  
 A-1

 4.200% Senior Notes due 2022 
 THIS SECURITY IS A REGISTERED GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY IS EXCHANGEABLE
FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE REGISTERED
FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO THE NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A
SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY. 
 Capitalized terms used herein have the meanings assigned to
them in the Indenture referred to below unless otherwise indicated. 
 (1) INTEREST. Owens Corning, a
Delaware corporation (the “Company”), promises to pay interest on the principal amount of this Security at 4.200% per annum from October 22, 2012 until maturity. The Company will pay interest semi-annually in arrears on
June 15 and December 15 of each year, or if any such day is not a Business Day, on the next succeeding Business Day (each, an “Interest Payment Date”). Interest on the Securities will accrue from the most recent date to
which interest has been paid or, if no interest has been paid, from the date of issuance; provided that if there is no existing Default in the payment of interest, and if this Security is authenticated between a record date referred to on the
face hereof and the next succeeding Interest Payment Date, interest shall accrue from such next succeeding Interest Payment Date; provided further that the first Interest Payment Date shall be June 15, 2013. The Company will pay interest
(including post-petition interest in any proceeding under any Bankruptcy Law) on overdue principal and premium, if any, from time to time on demand at a rate that is 1% per annum in excess of 4.200% to the extent lawful; it will pay interest
(including post-petition interest in any proceeding under any Bankruptcy Law) on overdue instalments of interest (without regard to any applicable grace periods) from time to time on demand at a rate that is 1% per annum in excess of 4.200% to
the extent lawful. Interest will be computed on the basis of a 360-day year of twelve 30-day months. 
 (2)
METHOD OF PAYMENT. The Company will pay interest on the Securities (except defaulted interest) to the Persons who are registered Holders of Securities at the close of business on the June 1 or December 1 next preceding the Interest
Payment Date, even if such Securities are cancelled after such record date and on or before such Interest Payment Date, except as provided in Section 2.13 of the Indenture with respect to defaulted interest. The Securities will be payable as to
principal, premium, if any, and interest at the office or agency of the Company maintained for such purpose within or without the City of Chicago in the State of Illinois, or, at the option of the Company, payment of interest may be made by check
mailed to the Holders at their addresses set forth in the register of Holders; provided that payment by wire transfer of immediately available funds will be required with respect to principal of and interest and premium, if any, on, all
Global Securities and all other Securities the Holders of which will have provided wire transfer instructions to the Company or the Paying Agent. Such payment will be in such coin or currency of the United States of America as at the time of payment
is legal tender for payment of public and private debts. 
 (3) PAYING AGENT AND REGISTRAR. Initially,
Wells Fargo Bank, National Association, the Trustee under the Indenture, will act as Paying Agent and Registrar. The Company may change any Paying Agent or Registrar without notice to any Holder. The Company or any Affiliate of the Company may act
in any such capacity. 
 (4) INDENTURE. The Company issued the Securities under an Indenture (the
“Original Indenture”), dated as of June 2, 2009 (as supplemented by the First Supplemental Indenture, dated as of June 8, 2009, the Second Supplemental Indenture, dated as of May 26, 2010 and the Third Supplemental
Indenture (the “Third Supplemental Indenture”), dated as of October 22, 2012, the “Indenture”) among the Company, the Subsidiary Guarantors party thereto and the Trustee. The terms of the Securities include
those stated in the Indenture and those made part of the Indenture by reference 

  
 A-2

 
to the Trust Indenture Act (the “TIA”). The Third Supplemental Indenture modifies Section 4.10 of the Original Indenture as it is applies to the Securities. The Securities
are subject to all such terms, and Holders are referred to the Indenture and the TIA for a statement of such terms. To the extent any provision of this Security conflicts with the express provisions of the Indenture, the provisions of the Indenture
shall govern and be controlling. The Securities are unsecured obligations of the Company. The Indenture does not limit the aggregate principal amount of Securities that may be issued thereunder. 

(5) OPTIONAL REDEMPTION. 
 (a) The Company may redeem, in whole at any time or in part from time to time, any Securities, at its option. If the Company elects to redeem the Securities prior to Optional Redemption Date, the Company
will pay a redemption price equal to the greater of (i) 100% of the principal amount of the Securities to be redeemed and (ii) as determined by the Quotation Agent, the sum of the present values of the remaining scheduled payments of
principal and interest on the Securities to be redeemed (excluding any portion of such payments of interest accrued as of the date of redemption), discounted to the date of redemption on a semi-annual basis (assuming a 360-day year, consisting of
twelve 30-day months) at the Treasury Rate plus 35 basis points, plus, in each case, accrued and unpaid interest thereon to, but not including, the date of redemption. If the Company elects to redeem the Securities on or after the Optional
Redemption Date, the redemption price will equal 100% of the aggregate principal amount of the notes being redeemed, plus accrued and unpaid interest thereon to, but not including, the date of redemption. 

(b) Unless the Company defaults in payment of the redemption price, on and after the date of redemption, interest will
cease to accrue on the Securities or portions thereof called for redemption. 
 (c) Any redemption pursuant to
Article 3 of the Indenture shall be made pursuant to the provisions of Sections 3.01 through 3.05 of the Indenture. 
 (6) REPURCHASE AT THE OPTION OF HOLDER. If there is a Change of Control Repurchase Event, the Company will be required to make an offer (a “Change of Control Offer”) to each Holder
to repurchase all or any part (equal to $2,000 or integral multiples of $1,000 in excess of $2,000) of each Holder’s Securities at a purchase price in cash equal to 101% of the aggregate principal amount thereof plus accrued and unpaid interest
thereon to the date of repurchase, subject to the rights of Holders on the relevant record date to receive interest due on the relevant Interest Payment Date (the “Change of Control Payment”). Within 30 days following any Change of
Control Repurchase Event, the Company will mail a notice to each Holder setting forth the procedures governing the Change of Control Offer as required by the Indenture. 

(7) NOTICE OF REDEMPTION. Notice of redemption will be mailed at least 30 days but not more than 60 days before the
redemption date to each Holder whose Securities are to be redeemed at its registered address. Securities in denominations larger than $2,000 may be redeemed in part but only in whole multiples of $1,000, unless all of the Securities held by a Holder
are to be redeemed. 
 (8) DENOMINATIONS, TRANSFER, EXCHANGE. The Securities are in registered form
without coupons in denominations of $2,000 and integral multiples of $1,000 in excess of $2,000. The transfer of Securities may be registered and Securities may be exchanged as provided in the Indenture. The Registrar and the Trustee may require a
Holder, among other things, to furnish appropriate endorsements and transfer documents and the Company may require a Holder to pay any taxes and fees required by law or permitted by the Indenture. The Company need not exchange or register the
transfer of any Security or portion of a Security selected for redemption, except for the unredeemed portion of any Security being redeemed in part. Also, the Company need not exchange or register the transfer of any Securities for a period of 15
days before a selection of Securities to be redeemed or during the period between a record date and the corresponding Interest Payment Date. 
 (9) PERSONS DEEMED OWNERS. The registered Holder of a Security may be treated as its owner for all purposes. 

  
 A-3

 (10) AMENDMENT, SUPPLEMENT AND WAIVER. Subject to certain exceptions,
the Indenture or the Securities or the Note Guarantees may be amended or supplemented with the consent of the Holders of at least a majority in aggregate principal amount of the then outstanding Securities including additional Securities, if any,
voting as a single class, and any existing Default or Event of Default or compliance with any provision of the Indenture or the Securities or Note Guarantees may be waived with the consent of the Holders of a majority in aggregate principal amount
of the then outstanding Securities including additional Securities, if any, voting as a single class. Without the consent of any Holder of a Security, the Indenture or the Securities or Note Guarantees may be amended or supplemented to correct any
mistakes or defects in the Indenture, but only if such action does not adversely affect the interests of the Holders of the Securities in any material respect or otherwise amend the Indenture in any respect that does not adversely affect the
interests of the Holders of the Securities; to add or change any of the provisions of the Indenture relating to the issuance or exchange of the Securities in registered form, but only if such action does not adversely affect the interests of the
Holders of the Securities or related coupons in any material respect; to provide for the assumption of the Company’s or a Subsidiary Guarantor’s obligations to Holders of the Securities and Note Guarantees by a successor Person; to impose
additional covenants and Events of Default or to add Note Guarantees of other Persons for the benefit of the Holders; to change or eliminate any of the provisions of the Indenture, but only if the change or elimination becomes effective when there
are no outstanding Securities or related coupons, which are entitled to the benefit of such provision and as to which such modification would apply; to secure the Securities; to comply with the requirements of the SEC in order to effect or maintain
the qualification of the Indenture under the TIA; to conform the text of the Indenture, the Securities or the Note Guarantees to any provision of the “Description of the Notes” section of the Company’s Prospectus Supplement dated as
of October 17, 2012, relating to the initial offering of the Securities, to the extent that such provision in that “Description of the Notes” was intended to be a verbatim recitation of a provision of the Indenture, the Note
Guarantees or the Securities; to supplement any of the provisions of the Indenture to permit or facilitate the defeasance and discharge of the Securities, but only if such action does not adversely affect the interests of the Holders of the
Securities or related coupons in any material respect; to establish the form or terms of the Securities or related coupons, as permitted by the Indenture; to evidence and provide for the acceptance of appointment by a successor Trustee and to add to
or change any of the provisions of the Indenture to facilitate the administration of the trusts by more than one Trustee or to allow any Subsidiary Guarantor to execute a supplemental indenture to the Indenture and/or a Note Guarantee with respect
to the Securities. 
 (11) DEFAULTS AND REMEDIES. Events of Default include: (i) default for 30 days
in the payment when due of interest on the Securities; (ii) default in the payment when due (at maturity, upon redemption or otherwise) of the principal of, or premium, if any, on, the Securities, (iii) failure by the Company or any of its
Subsidiaries for 60 days after notice to the Company by the Trustee or the Holders of at least 25% in aggregate principal amount of the Securities then outstanding voting as a single class to comply with any of the other agreements in the Indenture
or the Securities; (iv) default under certain other agreements relating to Indebtedness for money borrowed by the Company or any of its Subsidiaries, which default is a Payment Default or results in the acceleration of such Indebtedness prior
to its express maturity, but only if the aggregate principal amount of such Indebtedness under which there has been a Payment Default or which has been accelerated is $75 million or more; (v) certain events of bankruptcy or insolvency with
respect to the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of Subsidiaries that, taken together, would constitute a Significant Subsidiary; and (vi) except as permitted by the Indenture, any Note Guarantee
is held in any judicial proceeding to be unenforceable or invalid or ceases for any reason to be in full force and effect or any Subsidiary Guarantor or any Person acting on its behalf denies or disaffirms its obligations under such Subsidiary
Guarantor’s Note Guarantee. If any Event of Default occurs and is continuing, the Trustee or the Holders of at least 25% in aggregate principal amount of the then outstanding Securities may declare all the Securities to be due and payable
immediately. Notwithstanding the foregoing, in the case of an Event of Default arising from certain events of bankruptcy or insolvency, all outstanding Securities will become due and payable immediately without further action or notice. Holders may
not enforce the Indenture or the Securities except as provided in the Indenture. Subject to certain 

  
 A-4

 
limitations, Holders of a majority in aggregate principal amount of the then outstanding Securities may direct the Trustee in its exercise of any trust or power. The Trustee may withhold from
Holders of the Securities notice of any continuing Default or Event of Default (except a Default or Event of Default relating to the payment of principal or interest or premium, if any) if it determines that withholding notice is in their interest.
The Holders of a majority in aggregate principal amount of the then outstanding Securities by notice to the Trustee may, on behalf of the Holders of all of the Securities, rescind an acceleration or waive any existing Default or Event of Default and
its consequences under the Indenture except a continuing Default or Event of Default in the payment of interest or premium on, or the principal of, the Securities. The Company is required to deliver to the Trustee annually a statement regarding
compliance with the Indenture, and the Company is required, upon becoming aware of any Default or Event of Default, to deliver to the Trustee a statement specifying such Default or Event of Default. 

(12) TRUSTEE DEALINGS WITH COMPANY. The Trustee, in its individual or any other capacity, may make loans to, accept
deposits from, and perform services for the Company or its Affiliates, and may otherwise deal with the Company or its Affiliates, as if it were not the Trustee. 
 (13) NO RECOURSE AGAINST OTHERS. A director, officer, employee, incorporator or stockholder of the Company or any of the Subsidiary Guarantors, as such, will not have any liability for any
obligations of the Company or the Subsidiary Guarantors under the Securities, the Note Guarantees or the Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting a Security
waives and releases all such liability. The waiver and release are part of the consideration for the issuance of the Securities. 
 (14) AUTHENTICATION. This Security will not be valid until authenticated by the manual signature of the Trustee or an authenticating agent. 

(15) ABBREVIATIONS. Customary abbreviations may be used in the name of a Holder or an assignee, such as: TEN COM (=
tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to Minors Act). 

(16) CUSIP NUMBERS. Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification
Procedures, the Company has caused CUSIP numbers to be printed on the Securities, and the Trustee may use CUSIP numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such numbers either as
printed on the Securities or as contained in any notice of redemption, and reliance may be placed only on the other identification numbers placed thereon. 
 (17) GOVERNING LAW. THE INTERNAL LAW OF THE STATE OF NEW YORK WILL GOVERN AND BE USED TO CONSTRUE THE INDENTURE, THIS SECURITY AND THE NOTE GUARANTEES WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES
OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 
 The
Company will furnish to any Holder upon written request and without charge a copy of the Indenture. Requests may be made to: 
 Owens Corning

 One Owens Corning Parkway 
 Toledo,
OH 43659 
 Attention: Investor Relations 

  
 A-5

 ASSIGNMENT FORM 
 To assign this Security, fill in the form below: 
  

			
	(I) or (we) assign and transfer this Security to:
                                         
                                         
                                         
                   
	  

	(Insert assignee’s legal name)
	  

	(Insert assignee’s soc. sec. or tax I.D. no.)
	
	  

	
	  

	
	  

	
	  

	(Print or type assignee’s name, address and zip code)
	
	and irrevocably appoint 
                                         
                                         
                                         
                                         
        
	  
	  	

 to transfer this Security on the books of the Company. The agent may substitute another to act for him. 

Date:                       

 

			
	Your Signature:	 	  

	(Sign exactly as your name appears on the face of this Security)

 Signature Guarantee*:
                                      

 
  

	*	Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to the Trustee). 

  
 A-6

 Option of Holder to Elect Purchase 
 If you want to elect to have this Security purchased by the Company pursuant to Section 2.11 of the Supplemental Indenture, check the box below: 

 ̈ Section 2.11 

If you want to elect to have only part of the Security purchased by the Company pursuant to Section 2.11of the Supplemental
Indenture, state the amount you elect to have purchased: 

$                     
 

Date:                        
          
  

			
	 Your Signature:
	 	  

	
(Sign exactly as your name appears on the face of this Security)

  

			
	Tax Identification No.:	 	  

 Signature
Guarantee*:                                       
   
  
  

	*	Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to the Trustee). 

  
 A-7

 SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL SECURITY 

The following exchanges of a part of this Registered Global Security for an interest in another Registered Global Security or for a
definitive Registered Security, or exchanges of a part of another Registered Global Security or definitive Registered Security for an interest in this Registered Global Security, have been made: 

 

									
	 Date of Exchange
	 	 Amount of decrease in

Principal Amount
 of
 this Global Security
	 	 Amount of increase in

Principal Amount
 of
 this Global Security
	  	Principal Amount
of this Global 
Security
following such
decrease
(or
increase)	  	Signature of authorized
officer of Trustee
or
Custodian

  

 

  
 A-8

 Exhibit B 

FORM OF NOTATION OF GUARANTEE 
 For value received, each Subsidiary Guarantor (which term includes any successor Person under the Indenture) has, jointly and severally, unconditionally guaranteed, to the extent set forth in the
Indenture and subject to the provisions in the Indenture dated as of June 2, 2009 (as supplemented by the First Supplemental Indenture dated as of June 8, 2009, the Second Supplemental Indenture, dated May 26, 2010 and the Third
Supplemental Indenture dated October 22, 2012 the “Indenture”) among Owens Corning, (the “Company”), the Subsidiary Guarantors party thereto and Wells Fargo Bank, National Association, as trustee (the
“Trustee”), (a) the due and punctual payment of the principal of, premium, if any, and interest on, the Securities when due, whether at maturity, by acceleration or otherwise, the due and punctual payment of interest on overdue
principal of and interest on the Securities, if any, if lawful, and the due and punctual performance of all other obligations of the Company to the Holders or the Trustee all in accordance with the terms of the Indenture and (b) in case of any
extension of time of payment or renewal of any Securities or any of such other obligations, that the same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at stated maturity, by
acceleration or otherwise. The obligations of the Subsidiary Guarantors to the Holders of Securities and to the Trustee pursuant to the Note Guarantee and the Indenture are expressly set forth in Article 10 of the Indenture and reference is hereby
made to the Indenture for the precise terms of the Note Guarantee. 
 Capitalized terms used but not defined herein have the
meanings given to them in the Indenture. 
 [Remainder of Page Intentionally Left Blank] 

  
 B-1

 
			
	[GUARANTOR]
		
	By	 	 
		 	Name:
		 	Title:

  
 B-2

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