Builders FirstSource, Inc. is a supplier and manufacturer of structural and related building products for residential new construction. The Company groups its building products and services into five product categories: Prefabricated Components, Windows & Doors, Lumber & Lumber Sheet Goods, Millwork, and Other Building Products & Services. The Company’s Prefabricated Components are factory-built substitutes for job-site framing. The Windows & Doors category includes the manufacturing, assembly and distribution of windows, and the assembly and distribution of interior and exterior door units. The Lumber & Lumber Sheet Goods category includes dimensional lumber, plywood and oriented strand board (OSB) products. The Millwork category offers interior and exterior trim, columns and posts, as well as custom exterior features under the Synboard brand. The Other Building Products & Services category consists of various products, including hardware, composite materials, roofing and insulation.