Foundation Building Materials | 16,392 followers on LinkedIn. Supplying North America with Quality Building Materials | Foundation Building Materials (FBM) is North America's leading specialty building materials distributor, operating 300+ locations across the US and Canada. Since 2011, we've served 60,000+ customers through our comprehensive family of brands including RIS, PacSource, and Unified Door and Hardware Group. Together, we provide essential construction materials including gypsum wallboard, suspended ceilings, metal framing, insulation, and more.