• Harvey Building Products

• Hi Pro International, Inc.

• IBP Glass Block Grid System

• Innovative Building Products

• Inter-Sky Skylight Specialties

• Journault-Jourplex

• Lane-Aire Mfg. Corp.

• LinEl Signature

• Major Industries, Inc.

• Milcor/Lima Register Co.

• Milgard Windows

• Naturalite (The Vistawall Group)

• Niche Architectural Inc.

• ODL, Inc.

• Orca Mfg. Inc.

• Plasteco, Inc.

• Plasticraft

• Plazit Polygal Group North America

• Potter-Roemer

• Regal Mfg. Co., Div. Arcorp, Inc.

• Regal Research & Manufacturing Co.

• Schott Corporation

• Schott North America Inc.

• Seal-Krete, Inc.

• Skyline Products

• Skywall Translucent Systems