Owens Corning, 1901 49th Ave N, Minneapolis, MN 55430, US

CertainTeed is a leading North American manufacturer of building materials, which includes roofing, siding, insulation, windows and patio doors, fencing, decking, railing, foundations and pipe. The company is headquartered in Pennsylvania and has approximately 7,000 employees, as well as more than 40 manufacturing facilities throughout the United States. The company had sales of approximately $2.3 billion in 2003. CertainTeed is a subsidiary of Saint-Gobain, one of the top 100 industrial companies in the world. Saint-Gobain employs approximately 26,000 people in North America and nearly 170,000 people in more than 45 countries worldwide. Saint-Gobain s North American companies operate in industries as diverse as industrial ceramics and containers, reinforcements and flat glass, abrasives and building materials. CertainTeed maintains a location in Shakopee, Minn.