Quanex Building Products Corporation is a manufacturer of engineered materials and components for the United States building products market. The Company is the wholly owned subsidiary of Quanex Corporation. The Company operates in two segments: Engineered Building Products and Aluminum Sheet Building Products. Engineered Building Products segment comprises six fabricated metal components operations, two facilities producing wood fenestration (door and window) components, four polyvinyl chloride (vinyl) extrusion facilities, a flexible insulating glass spacer operation and a facility that produces automated equipment for assembling insulating glass units. The Aluminum Sheet Building Products segment comprises an aluminum mini-mill operation and three stand-alone aluminum sheet cold finishing operations. On April 23, 2008, Quanex Corporation completed a spin-off of its building products segment and the subsequent merger of the remaining Quanex Corporation with a subsidiary of Gerdau SA.