84 Lumber Company, based in Eighty Four, Pennsylvania, is the largest privately held supplier of building materials in the United States. With over 7,500 associates across 320 facilities, they specialize in providing materials and installation services for single-family, multifamily, and commercial construction projects. Their offerings include custom millwork, engineered wood products, and a dedicated door shop, serving both homeowners and businesses in need of high-quality building materials.