Exhibit 3

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing by the Owens Corning/Fibreboard Asbestos Personal Injury Trust, the PI Trust Advisory Committee and Michael J. Crames, in his capacity as the Future Claimants’ Representative under the Owens Corning/Fibreboard Asbestos Personal Injury Trust Agreement, dated October 31, 2006, as amended, on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to shares of common stock, par value $0.01 per share, of Owens Corning, a Delaware corporation, and that this Agreement be included as an Exhibit to such joint filing. This Agreement may be executed in any number of counterparts all of which taken together shall constitute one and the same instrument.

[Signature pages follow]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of this 24th day of February, 2010.

OWENS CORNING/FIBREBOARD ASBESTOS PERSONAL INJURY TRUST
 

/s/ Harry Huge  

Harry Huge, Trustee 

/s/ D. LeAnne Jackson  

D. LeAnne Jackson, Trustee 

/s/ Dean M. Trafelet  

Dean M. Trafelet, Managing Trustee 

PI TRUST ADVISORY COMMITTEE
 

/s/ Matthew Bergman  

Matthew Bergman, Esq. 

/s/ Russell W. Budd  

Russell W. Budd, Esq. 

/s/ John D. Cooney  

John D. Cooney, Esq. 

/s/ James Ferraro  

James Ferraro, Esq. 

/s/ Mark C. Meyer  

Mark C. Meyer, Esq. 

/s/ Steven Kazan  

Steven Kazan, Esq. 

/s/ Joseph F. Rice  

Joseph F. Rice, Esq. 

/s/ Armand J. Volta, Jr.  

Armand J. Volta, Jr., Esq. 

/s/ Perry Weitz  

Perry Weitz, Esq. 

Joint Filing Agreement

FUTURE CLAIMANTS’ REPRESENTATIVE, under the Owens Corning/Fibreboard Asbestos Personal Injury Trust Agreement, dated October 31, 2006
 

/s/ Michael J. Crames  

Michael J. Crames 

Joint Filing Agreement