Owens Corning engages in the development, manufacture, and marketing of insulation, roofing, and fiberglass composites. It operates through the following segments: Composites, Insulation, and Roofing. The Composites segment manufactures, fabricates, and sells glass reinforcements in the form of fiber, and also includes vertically integrated downstream activities. The Insulation segment provides insulating products which help customers conserve energy; provide improved acoustical performance; and offer convenience of installation and use. The Roofing segment offers laminate and strip asphalt roofing shingles and other products including oxidized asphalt and roofing accessories. The company was founded on October 31, 1938 and is headquartered in Toledo, OH.