CertainTeed Corporation is a leading North American manufacturer of building materials including roofing, vinyl and fiber cement siding, trim, fence, railing, decking, foundations, insulation, gypsum, ceilings, and pipe products. Headquartered in Valley Forge, Pennsylvania, CertainTeed has approximately 7,000 employees and 70 facilities throughout the United States and Canada. Through its Vision, Mission, Values and Objectives (VMVO) initiative, CertainTeed strives to be the preferred choice for innovative building products and systems by delivering a superior Customer experience to a broader market through the development of exceptional team performance and world-class processes.