A built-up roof (BUR) is composed of several layers of bitumen alternated with ply sheets. The plies of roofing felt are welded together with hot asphalt reinforcing the multiple-layered protection
Hi-Rise Roofing
Commercial Roofing Contractor
A built-up roof (BUR) is composed of several layers of bitumen alternated with ply sheets. The plies of roofing felt are welded together with hot asphalt reinforcing the multiple-layered protection