Builders FirstSource, Inc. manufactures and supplies building materials, manufactured components, and construction services to professional contractors, sub-contractors, and consumers in the United States. Its products include lumber and lumber sheet goods comprising dimensional lumber, plywood, and OSB products that are used in on-site house framing; and windows, and interior and exterior door units, as well as interior trims and custom products under the Synboard brand. The company's manufactured products consist of wood floor and roof trusses, steel roof trusses, wall panels, stairs, and engineered wood; gypsum, roofing and insulation products, including wallboards, ceilings, joint treatment, and finishes, as well as vinyl, composite, and wood sidings; and exterior trims, other exteriors, metal studs, and cement. In addition, it offers other building products and services, such as cabinets and hardware, as well as turn-key framing, shell construction, design assistance, and professional installation services. Further, the company supplies professional grade building products, such as lumber and lumber sheet goods, and various windows, doors, and millwork lines. The company was formerly known as BSL Holdings, Inc. and changed its name to Builders FirstSource, Inc. in October 1999. Builders FirstSource, Inc. was founded in 1998 and is based in Dallas, Texas.