Founded in 1904, CertainTeed Corporation is one of the leading manufacturers of building materials throughout North America. It provides roofing, siding, insulation window, patio door, fencing, decking, railing, foundations and piping products for interior and exterior infrastructure. It offers roofing products for commercial, industrial, institutional and residential roofing and waterproofing applications. CertainTeed Corporation provides insulation products with thermal, acoustical and energy-saving features. The company also provides gypsum wallboard and finishing products to architects, builders and distributors. CertainTeed Corporation offers products for homeowners, distributors, dealers, builders, contractors and design professionals. The company is headquartered in Valley Forge, Pa., and has over 8,000 employees and nearly 60 manufacturing facilities throughout the United States. CertainTeed Corporation is a subsidiary of Saint-Gobain, which is one of the leading construction material throughout the world.