Business: Builders FirstSource, headquartered in Dallas, Texas, is a leading supplier and manufacturer of structural and related building products for residential new construction. The company operates principally in the southern and eastern United States and has distribution centers and manufacturing facilities, many of which are located on the same premises as their 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.