Firestone Building Products Co. LLC (FSBP) revealed on April 3 that it has completed its acquisition of roofing materials supplier Gaco Western Inc. Gaco is a manufacturer and distributor of high-performance waterproofing and heat insulation products and leads the industry with innovative silicon-based roofing materials. FSBP is a wholly-owned roofing solutions and construction materials supply subsidiary of Bridgestone Americas Inc.,…