Cornerstone Building Brands is a leading manufacturer of exterior building products in North America. Headquartered in Cary, North Carolina, the Company serves residential and commercial customers across new construction and the repair & remodel markets. As the #1 manufacturer of windows, vinyl siding, insulated metal panels, metal roofing and wall systems and metal accessories, Cornerstone Building Brands combines a comprehensive portfolio of products with an expansive national footprint that includes approximately 20,000 employees at manufacturing, distribution and office locations throughout North America.