• Lamboo® Incorporated

• Legere Group, Ltd.

• Liberty Valley Doors

• Lincoln Windows

• Lincoln Wood Products, Inc.

• Linford Brothers Glass Co.

• Loewen

• Loewen Windows

• Louisiana Pacific Corporation

• MI Home Products Inc.

• MW Manufacturers Inc.

• Malta Wood Windows & Doors

• Marvin Windows and Doors

• MasterCraft Cabinets, Inc.

• Megawood Industries

• Mercer Industries, Inc.

• Milgard Windows

• Mission Moulding & Wood Specialties

• Moss Supply Co.

• N. T. Jenkins Mfg. Co.

• NanaWall Systems Inc.

• National Woodworks

• New Morning Windows

• Niche Architectural Inc.

• Norco

• Nu-Sash