• PTX Industries, Inc.

• Quarry Slate Company

• RD Herbert & Sons Co.

• RGM Products

• RHEINZINK GmbH & Co. KG

• Re-Con Building Products, Inc.

• Re-Con Building Products, Inc.

• Revere Copper Products Inc.

• Rheinzink America Inc.

• Rheinzink Canada Ltd.

• Roberts Roofing

• S&K Roofing, Siding and Windows

• Shakertown 1992, Inc.

• Siplast, Inc.

• SkyeBuilders, Inc.

• Slate International, Inc.

• South Shore Roofing, Inc.

• Structural Slate Company

• Tamark/Life Pine Mfg.

• Tamko Roofing Products

• Thermoflo Equipment Company, Inc.

• US Intec, a divison of BMCA

• Ultimate Exteriors of Minnesota

• Vande Hey-Raleigh Mfg., Inc.

• Vermont Slate & Copper Service

• Vermont Structural Slate Company, Inc.