Through innovation and creative product design, CertainTeed has helped shape the building products industry for more than 100 years. Founded in 1904 as General Roofing Company, the firm made its slogan "Quality Made Certain, Satisfaction Guaranteed," which 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, walls, ceilings and access covers.

Headquartered in Valley Forge, Pennsylvania, CertainTeed and its affiliates have approximately 9,000 employees and 70 manufacturing facilities throughout the United States and Canada. In 2006 the group had consolidated sales approaching $4 billion. www.certainteed.com