Through the responsible development of innovative and sustainable building products, CertainTeed has helped shape the building products industry for more than 100 years. Founded in 1904 as General Roofing Manufacturing Company, the firm's slogan "Quality Made Certain, Satisfaction Guaranteed," quickly inspired the name CertainTeed. Today, CertainTeed® is North America’s leading brand of exterior and interior building products, including roofing, siding, windows, fence, decking, railing, trim, foundations, pipe, insulation, gypsum, ceilings and access covers. Headquartered in Valley Forge, Pa., CertainTeed and its affiliates have more than 6,000 employees and more than 65 manufacturing facilities throughout the United States and Canada. In 2009, CertainTeed was named ENERGY STAR Partner of the Year by the U.S. Environmental Protection Agency, a national award that recognizes environmentally responsible corporations. The group had total sales of more than $3 billion in 2008. www.certainteed.com.