Document:

Third Supplemental Indenture

 Exhibit 4.1 
 OWENS CORNING 
 THIRD SUPPLEMENTAL INDENTURE 
 THIRD SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of April 24,
2008, among OCV Fabrics US, Inc., a Maine corporation (the “Guaranteeing Subsidiary”), a subsidiary of Owens Corning, a Delaware corporation (the “Company”), the Company, the other Guarantors (as defined in the
Indenture referred to herein) and LaSalle Bank National Association, as trustee under the Indenture referred to below (the “Trustee”). 
 W I T N E S S E T H 
 WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture
(the “Indenture”), dated as of October 31, 2006 providing for the issuance of 6.50% Senior Notes due 2016 and the 7.00% Senior Notes due 2036 (the “Notes”); 
 WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental
indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”);

 WHEREAS, the Guaranteeing Subsidiary, concurrently with the execution of this Supplemental Indenture, will guarantee the Company’s
Obligations under the Credit Agreement; and 
 WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute
and deliver this Supplemental Indenture. 
 NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration,
the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 
 1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

 2. AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on
the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof. 
 4.
NO RECOURSE AGAINST OTHERS. No past, present or future director, officer, employee, incorporator, stockholder or agent of the Guaranteeing Subsidiary, as such, shall have any liability for
any obligations of the Company or any Guarantor under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the
Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the
view of the SEC that such a waiver is against public policy. 

 5. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS
SUPPLEMENTAL INDENTURE 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. 
 6. COUNTERPARTS. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together
represent the same agreement. 
 7. EFFECT OF HEADINGS. The Section headings herein are for convenience only and
shall not affect the construction hereof. 
 8. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for
or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Company. 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and
attested, all as of the date first above written. 
  

			
	OCV Fabrics US, Inc.
		
	By:	 	/s/ Stephen K. Krull
	Name:  	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Owens Corning
		
	By:	 	/s/ Ralph A. Than
	Name:	 	Ralph A. Than
	Title:	 	Vice President Finance and Treasurer
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Senior Vice President, General
		 	Counsel and Secretary
	
	CDC Corporation
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Engineered Pipe Systems, Inc.
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative
	
	Eric Company
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative
	
	Falcon Foam Corporation
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative

 Signature Page to Supplemental Indenture 

			
	INTEGREX Ventures LLC
		
	By:	 	/s/ Stephen K. Krull
	Name:  	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	IPM, Inc.
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Jefferson Holdings, Inc.
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Modulo USA LLC
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	OCCV1, Inc.
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative
	
	OCCV2, LLC
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative
	
	OCCV3, LLC
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative
	
	OCCV4, LLC
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative

 Signature Page to Supplemental Indenture 

			
	Owens Corning Composite Materials, LLC
		
	By:	 	/s/ Stephen K. Krull
	Name:  	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Owens Corning Construction Services, LLC
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Owens Corning Masonry Products, LLC (f/k/a Owens Corning Cultured Stone, LLC)
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	OCV Intellectual Capital, LLC (f/k/a Owens-Corning Fiberglas Technology II, LLC
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Owens Corning Foam Insulation, LLC
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative
	
	Owens Corning Franchising, LLC
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative
	
	Owens-Corning Funding Corporation
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative

 Signature Page to Supplemental Indenture 

			
	Owens Corning HOMExperts, Inc.
		
	By:	 	/s/ Stephen K. Krull
	Name:  	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Owens Corning HT, Inc.
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Owens Corning Insulating Systems, LLC
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Owens Corning Intellectual Capital, LLC
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Owens Corning Overseas Holding, Inc.
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative
	
	Owens Corning Roofing and Asphalt, LLC
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative
	
	Owens Corning Sales, LLC (f/k/a Owens Corning Sales, Inc.)
		
	By:	 	/s/ Ralph A. Than
	 Name:
	 	Ralph A. Than
	 Title:
	 	Vice President Finance and Treasurer
	
	Owens Corning Science and Technology, LLC
		
	By:	 	/s/ Stephen K. Krull
	 Name:
	 	Stephen K. Krull
	 Title:
	 	Authorized Representative

 Signature Page to Supplemental Indenture 

			
	Owens Corning U.S. Holdings, LLC
		
	By:	 	/s/ Stephen K. Krull
	Name:  	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Palmetto Products, Inc
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	Soltech, Inc.
		
	By:	 	/s/ Stephen K. Krull
	Name:	 	Stephen K. Krull
	Title:	 	Authorized Representative
	
	LaSalle Bank National Association,
as Trustee
		
	By:	 	/s/ Margaret M. Muir
		 	Authorized Signatory

 Signature Page to Supplemental IndentureJoinder Agreement to the Subsidiaries Guaranty

 Exhibit 4.2 
 JOINDER AGREEMENT 
 JOINDER dated as of April 24, 2008, to the Subsidiaries Guaranty (as defined
below) among the undersigned and Citibank N.A., as Administrative Agent under the Credit Agreement (as defined below) (as may be amended, restated, supplemented and/or otherwise modified from time to time, this “Joinder”).

 A. Reference is made to (a) the Credit Agreement dated as of October 31, 2006 (as the same may be amended, restated,
supplemented and/or otherwise modified from time to time, the “Credit Agreement”), among Owens Corning, the lenders from time to time party thereto and the Administrative Agent, and (b) the Subsidiaries Guaranty dated as of
October 31, 2006 (as amended, restated, supplemented and/or otherwise modified from time to time, the “Subsidiaries Guaranty”) among the Subsidiaries from time to time party thereto, as Guarantors, and Citibank, N.A., as
Administrative Agent. 
 B. Capitalized terms used herein and not otherwise defined herein shall have the meanings assigned to such terms in
the Credit Agreement and the Subsidiaries Guaranty. 
 C. As an inducement to the further extensions of credit under the Credit Agreement,
the U.S. Borrower has agreed to cause the undersigned Subsidiary of the U.S. Borrower (each, an “Additional Guarantor”) to become a party to the Subsidiaries Guaranty. 
 Accordingly, the Additional Guarantor agrees as follows: 
 SECTION 1. In accordance with Section 22 of the Subsidiaries Guaranty, the Additional Guarantor by its signature below shall be included as a Guarantor under the Subsidiaries Guaranty with the same force and
effect as if originally named therein as a Guarantor and agrees to comply in all respects with all the terms and provisions of the Subsidiaries Guaranty. Each reference to “Guarantor” in the Subsidiaries Guaranty shall be deemed to include
the Additional Guarantor. 
 SECTION 2. The Additional Guarantor represents and warrants to the Administrative Agent and the Lenders that
this Joinder has been duly authorized, executed and delivered by it and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms, except to the extent that the enforceability thereof maybe limited by
applicable bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium or other laws affecting creditors’ rights generally and general principles of equity, regardless of whether considered in a proceeding in equity or at law, and
an implied covenant of good faith and fair dealing. 
 SECTION 3. This Joinder shall become effective when the Administrative Agent shall
have received counterparts of this Joinder bearing the signature of the Additional Guarantor. Delivery of an executed signature page to this Joinder by telecopy, or other electronic transmission shall be as effective as delivery of a manually signed
counterpart of this Joinder. 

 SECTION 4. Except as expressly supplemented hereby, the Subsidiaries Guaranty shall remain in full force
and effect. 
 SECTION 5. THIS JOINDER SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK 

 SECTION 6. Any provision of this Joinder held to be invalid, illegal or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such invalidity, illegality or unenforceability without affecting the validity, legality and enforceability of the remaining provisions hereof and in the Subsidiaries Guaranty; and the invalidity of a particular
provision in a particular jurisdiction shall not invalidate such provision in any other jurisdiction. 
 SECTION 7. All communications and
notices hereunder shall be in writing and given as provided in Section 14 of the Subsidiaries Guaranty. 
 SECTION 8. In the event of
any conflict between this Joinder and the Intercompany Subordination Agreement, the terms of the Intercompany Subordination Agreement shall control. From and after the execution and delivery hereof by the parties hereto, this Joinder shall
constitute a “Credit Document” for all purposes of the Credit Agreement. 

 IN WITNESS WHEREOF, the Additional Guarantor has duly executed this Joinder to the Subsidiaries Guaranty
as of the day and year first above written. 
  

			
	OCV FABRICS US, INC., as an Additional Guarantor
		
	By: 	 	/s/ Stephen K. Krull
		 	Name: Stephen K. Krull
		 	Title: Authorized Representative
	
	 Address:
 One Owens Corning
Parkway
 Toledo, OH 43659
 Tel:
(419) 248-8650

 Signature Page to 
 Joinder Agreement (Subsidiaries Guaranty) 

 Accepted and Agreed to: 
 CITIBANK, N.A., as Administrative Agent 
  

			
		
	By: 	 	/s/ Kevin A. Ege
		 	Name: Kevin A. Ege
		 	Title: Vice President

 Signature Page to 
 Joinder Agreement (Subsidiaries Guaranty)

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