Pictures Of Built Up Roofs

Components of a bur system include the roof deck a vapor retarder insulation membrane and surfacing material.

Pictures of built up roofs. A built up roof bur is the most widely used material for covering flat roof surfaces. Built up roofing or bur is the most popular choice of roofing used on commercial industrial and institutional buildings. Click here to see more roofing topics. Felts are produced in a standard width of 36 inches and metric width of about one meter.

Built up roof systems typically have a layer of insulation under the waterproof bitumen membrane as well as some sort of. It is composed of alternating layers of reinforcing fabric and bitumen asphalt and is finished with a top layer of aggregate such as stone or gravel. These roofs have been used for well over a century and are made from multiple layers of reinforced fabric joined by a binding agent or bitumen. Built up roofs are however considered to be fully adhered when installing directly to the roofing deck so underlayment isn t always needed depending on the situation.

Built up roofing for an average commercial roof it will usually cost between per 5 50 8 50 square foot in materials and labor to install a typical built up roofing system. Modified bitumen can be installed by heat welding hot asphalt or cold adhesive processes meaning that it can be installed on nearly any type of flat roof building. Built up roofing. Roofing felts are reinforced with either glass fiber mats or organic mats.

Construction definition built up roof. Built up roofing also called bur is the most common roofing material used on low slope roofs. Typical built up roofs have three to five layers called plies. Built up roofs generally are considered to be fully adhered if applied directly to roof decks or insulation.

Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. Bur is preferred for low slope or flat roofs because it creates a continuous sealed surface. A flat or low sloped roof made up of multiple layers of bitumen asphalt or coal tar pitch and reinforcing felts. This price range can change depending on the materials you choose.

Going back about 120 years the grandfather of flat roofs is the built up roof or bur. 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.