Headquartered in Dallas, Texas, Builders FirstSource is a supplier and manufacturer of structural and related building products for residential new construction. The company operates in 11 states, principally in the southern and eastern United States, and has 57 distribution centers and 57 manufacturing facilities, many of which are located on the same premises as its distribution facilities. Manufacturing facilities include plants that manufacture roof and floor trusses, wall panels, stairs, aluminum and vinyl windows, custom millwork and pre-hung doors. Builders FirstSource also distributes windows, interior and exterior doors, dimensional lumber and lumber sheet goods, millwork and other building products.