http://www.RoofRepairCarrollton.com Roof Repair Carrollton Homes with flat or low sloping roofs usually have a built up roof surface, also called a tar-and-gravel roof. Sheds, garages, and other out buildings are sometimes roofed with asphalt roll roofing. A built-up roof consists of several layers of roofing felt, each coated with hot or cold-mopped asphalt.
