A wholly owned subsidiary Oldcastle, Allied Building Products Corporation is one of the largest distributors of roofings and siding in the United States. Founded in 1950, it manages a staff of more than 3,500 employees at over 200 branches in nearly 30 U.S. states. The company maintains an inventory of approximately 85,000 products, including doors, windows, residential tiles and trims. Allied Building Products Corporation has a fleet of more than 1,500 cars, trucks and tractor trailers. The company manages various office facilities and warehouses that are spread over a total area of nearly 1 million square feet. It sells products from several manufacturers, such as Dietrich Industries, Georgia Pacific, Hamilton Materials Incorporated, Ware Industries and Murco Wall Products Incorporated.