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Founded in 1988, CertainTeed Corporation is one of the leading manufacturers of building materials in the North America. Located in Wilmington, Calif., the company provides a variety of roofing, vinyl and fiber cement siding, trim, fence, railing, decking, foundation, insulation, gypsum, ceiling and pipe products. It is a subsidiary of Saint-Gobain, one of the largest manufacturers of building materials in the world. Housing approximately 200-manufacturing facilities, Saint-Gobain offers industrial ceramics/containers, reinforcements, flat glasses, abrasives and building materials.