Formerly known as Lumbermens, ProBuild is one of the largest suppliers of building materials to professional contractors in the United States. The company operates more than 550 lumber and building product distribution, manufacturing and assembly centers that serve over 42 U.S. states. It sells a range of building materials, including lumber, plywood, gypsum and related products. The company also offers roofing and siding products, as well as hardware and tools. ProBuild s manufacturing activities include trusses, wall panels and window fabrication. The company provides construction services that include installation of framing, millwork and insulation products. Its partners include BlueLinx Corporation, Louisiana-Pacific Corporation, Johns Manville and Canfor. Founded in 1895, ProBuild maintains a location in Meridian, Idaho.