Cornerstone Building Brands, Inc., formerly NCI Building Systems, Inc. is a manufacturer and marketer of metal products in North America. Its operating segments include Engineered building systems, Metal components, Insulated Metal Panel (IMP) and Metal coil coating. The Engineered building systems segment is engaged in the manufacturing of main frames and long bay systems, and engineering and drafting. The Metal components segment's products include metal roof and wall panels, doors, metal partitions, metal trim and other related accessories. It manufactures and distributes a range of metal products for the non-residential construction market. It operates in the United States, Mexico, Canada and China. It provides metal coil coating services, and designs, engineers, manufactures and markets metal components and engineered building systems. It also provides metal coil coating services for commercial and construction applications, servicing both internal and external customers.