CertainTeed®, a subsidiary of Saint-Gobain, is North America's leading brand of sustainable exterior and interior building products.Headquartered in Malvern, Pa., CertainTeed has helped shape the building products industry for more than 100 years, through the responsible development of innovative and sustainable building products. Founded in 1904 as General Roofing Manufacturing Company, the firm's slogan "Quality Made Certain, Satisfaction Guaranteed,"​ quickly inspired the name "CertainTeed."​ A subsidiary of Saint-Gobain, the world's largest building products company, CertainTeed® is North America's leading brand of exterior and interior building products, including roofing, siding, fence, decking, railing, trim, insulation, gypsum and ceilings. CertainTeed and its affiliates proudly have a staff of more than 6,300 employees and operate more than 60 manufacturing facilities throughout the United States and Canada. For five consecutive years, the company has received top honors from the U.S. Environmental Protection Agency for its contributions in protecting the environment and was most recently the recipient of the 2013 ENERGY STAR Sustained Excellence Award. The group had total sales of approximately $3.4 billion in 2016. www.certainteed.com Quality made Certain, Satisfaction guaranteedhttp://www.CertainTeed.comVisit the CertainTeed Building Knowledge Bloghttp://blog.certainteed.com