Stock Building Supply is part of Builders FirstSource, the nation's largest supplier of structural building products, components and services to professional builders and contractors. The company supplies a wide range of materials including lumber, doors, windows, roofing, siding, hardware and custom millwork, alongside services such as delivery, design support and advanced manufacturing. They also offer digital solutions through myBldr, which connects design and sales with material ordering and project completion. This company suits referrals from construction professionals, builders and contractors who need reliable bulk supplies and custom components for single-family homes, multi-family projects or renovation work.