Parts and composition of tar-and-gravel, built-up, and flat roofing systems, with a helpful tar-and-gravel roof construction diagram. We want to make tar and gravel roofing popular again. Is a Tar and Gravel Roof right for your home? Learn about costs, benefits, and compare to other roofing types.
Get free estimates from local pros today! When professional tar and gravel roofing replacement, repair, or installation is neede call Roof 101.
A tar and gravel roof , also known as a built-up roof, has been the go-to flat roof technology for decades. Here is a guide to its pros and cons. Roofs with a rise of inches for every inches of run or less are candidates for a built-up roofing system. Tar-and-gravel roofs consist of several layers of asphalt impregnated building paper, also called roofing felt, applied over a plywood deck.
Each layer is hot-mopped with liquid asphalt to form a . Instea it migrates a few feet away before coming through to stain the ceiling. But asphalt shingles are a satisfactory roofing choice, used on about of the roofs in America. When you think of a commercial roof , you may think of black tar being mopped on a flat roof.
But does one of the oldest types of commercial roofs have problems you should know about?
Many roofing materials such as shingles are unsuited to low slope applications. Tar and gravel roofing was commonly used for this application in the past. They are composed of layers of perforated felt or fiberglass material with asphalt in between, flooding the top with asphalt and applying gravel to the hot asphalt. Their use has decreased with the more effective modern materials.
Contact Eastman Roofing to discuss your . Repairing tar and gravel roofs can lead to a very complex process should there be significant damage or improper installation. The surface is given a flood coat of hot asphalt and pea sized gravel is evenly distributed on top. Some of the gravel is permanently embedded into the . Perhaps the most striking visual aspect , and in fact a defining feature of contemporary homes is the low pitched roof, often less than 2: 12. The most common original roofing material is tar and gravel.
Built-Up Roof (BUR) The traditional hot- tar-and-gravel roof is built from three or more plies of waterproof material alternated with hot tar and ballasted by a layer of smooth river stone. Once made of tar paper, these types of roofs gradually are using more-advanced materials such as fiberglass membranes. Weakening seams on Tar and Gravel roofs can be strengthened by removing the protective gravel, cleaning, and applying modified bitumen. This surface layer weighs down .