Companies

• Calgary Cupola and Weathervane

• Company 2001, Inc.

• Concord Sheet Metal Products

• Copper Development Association Inc.

• CopperCraft

• Corrosion Control Products Company

• D E L Roofing Equipment & Supplies Ltd.

• Davlin Coatings

• Dur-O-Wal

• Gaco Western, Inc.

• Gaco Western, Inc.

• HOFF Enterprises Inc.

• Hohmann & Barnard, Inc.

• Hyload Roofing Systems

• ITW Buildex

• Illinois Products Corp.

• Ink Smith Inc.

• Jamsill Inc.

• Johns Manville Corp.

• Koppers Industries, Inc.

• Lennel Specialties Corporation

• Maier: Ernest Maier

• Metacrylics

• Monsey Bakor Inc.

• Murray Sheet Metal Co.

• NEI Advanced Composite Technology (NEI, Inc.)