84 Lumber is an American builing materials chain. 84 Lumber Company is the second largest privately held building materials supplier to professional contractors in the country, behind Pro-Build Holdings of Denver (with $5.95 billion in sales in 2006). Headquartered in the Pittsburgh Metro Area town of Eighty Four, Pennsylvania, it was founded in 1956 by Joseph Hardy. 84 had 475 store locations in 35 states at the end of 2006.