Created through a merger of NCI Building Systems and Ply Gem Building Products, Cornerstone Building Brands provides a broad range of exterior building products to residential and commercial customers for both new construction and repair & remodel. Cornerstone’s product portfolio includes windows, doors, siding, metal wall and roof systems, engineered commercial buildings, insulated metal panels, stone, and other adjacent products. Based in Cary, NC, the company has nearly 20,000 employees across 80 manufacturing, distribution and office locations throughout North America.