Builders FirstSource supplies, manufactures, and installs building materials for professional homebuilders and remodelers across the United States. Its model combines distributed lumberyards and supply centers with value-added manufacturing such as roof and floor trusses, wall panels, windows, millwork, and pre-hung doors, plus installation and framing services. The company is organized around the U.S. residential construction market and serves customers that want a single source for materials, labor-saving components, and jobsite delivery. It operates about 585 locations in 43 states and has built a dense footprint in major housing markets to support just-in-time service. Recent acquisitions have expanded its presence in trusses, wall panels, lumber, and other value-added categories. The business is closely tied to housing starts, repair and remodel activity, and the broader availability of labor, credit, and construction inputs.