• Diversifoam Products

• Enercept, Inc.

• Excel Manufacturing Group, Inc.

• GAF

• H.V. & T.G. Thompson Lumber Co.,Inc.

• Homasote Company

• International Paper

• LP Building Products

• Lamboo® Incorporated

• Langfang Joyo Wood Industry Co, Ltd

• Leatherback Industries

• Louisiana Pacific Corporation

• Merkrete Systems

• Premier Building Systems

• Shelter Enterprises, Inc.

• Simpson Plywood

• Sylvan Industries, Inc.

• Temple-Inland Forest Products Corporation

• U.S. Architectural Products, Inc.