84 Lumber is an American building materials chain. 84 Lumber Company is the largest privately held building materials supplier to professional contractors in the country. Headquartered in the Pittsburgh Metro Area town of Eighty Four, Pennsylvania, it was founded on January 31, 1958 [2] by Joseph Hardy. 84 had 475 store locations in 35 states at the end of 2006.

In 2008, the company employed no less than 4,500 staff [3] and sales were reported to be in excess of $2 billion [4].

84 Lumber is the tenth largest home improvement store in the nation, according to Home Channel News, a trade publication that covers LBM and home improvement retailing. While the company saw its performance slip in the beginning of the 21st century, the opening of many new stores in Southern states, in anticipation of a post-Katrina building boom, has reinvigorated the corporation. 84 Lumber also follows a different business model from its chief competitors, operating more like a large version of a hardware store than a big-box home improvement center. The company emphasizes creating no-frills stores and selling low-cost materials, especially of their trademark lumber and wood products. In a typical 84 Lumber store, one is more likely to find a greater assortment of building equipment than in a standard Lowe's or Home Depot. However, 84 Lumber carries a much smaller assortment of high-tech and high-end home and garden products. In addition to the retail stores, the corporation operates 4 truss plants which manufacture roof trusses, floor trusses and wall panels.