Cornerstone Building Brands is the largest manufacturer of exterior building products for residential and low-rise non-residential buildings in North America. Headquartered in Cary, North Carolina, we serve residential and commercial customers across new construction and repair and remodel markets. As the #1 manufacturer of vinyl windows, vinyl siding, insulated metal panels, metal roofing and wall systems and metal accessories, Cornerstone Building Brands combines an expansive portfolio of strong brands and quality products with a broad multichannel distribution platform that includes approximately 20,000 employees at manufacturing, distribution and branch office locations throughout North America.