• Profiles In Concrete

• Quarrix Building Products

• Reliable Products

• Safe-Air Dowco

• Solar Group

• Southeastern Metals Manufacturing Co., Inc.

• Southeastern Metals Manufacturing Co., Inc.

• Sunvent Industries

• Sylro Sales Corp.

• The AIROLITE Company

• Thunder Bay Concrete Prod.

• Vestal Mfg. Co.

• Waccamaw Brick Co.

• Western Canwell

• Western Concrete Products Co.

• Willard Shutter Company