This ProBuild on 41st Avenue is across the street from Home Depot. It was formerly Lumberman's, and before that, San Lorenzo Lumber. Probuilt bills itself as the country's largest supplier of building materials to national builders, local contractors and laymen. It carries everything to do with construction from engineered wood to custom fabricated staircases. It offers panelization, truss manufacturing, gypsum installation and yards operated by managers who know the local market. ProBuild began in 1997 and now has more than 470 locations nationwide.