DB started in 1992 as a division of Duncan Bolt Company. Then, in 1997 DB incorported into its own company and in 2005 moved to its present 20,000 square foot warehouse in Ontario, California. DB specializes in domestic and imported self drilling fasteners and structural A325 and TC Bolts for the metal building / metal roofing industries. We carry self
Competition Roofing is a full-service roofing company in Upland, California. We specialize in Residential Homes, Commercial Building, Apartments Buildings & HOA's. We are your Southern California's Top choice for Composite, Tile and Flat Roof Repair, Tear Down and Replacement! Contact us today for a free estimate! Competition Roofing is a family run