Built-Up (Tar-and-Gravel) Roofing Systems
Parts and composition of tar-and-gravel, built-up, and flat roofing systems, with a helpful tar-and-gravel roof construction diagram. Flat or almost-flat roofs can collect a tremendous amount of water, especially if their outlets or downspouts become plugged with leaves and debris. For this reason, they must be designed to seal against standing water that may pool […]