Materials To Do A Built Up Roof

A built up roof is typically composed of alternating layers of bitumen with reinforcing fabrics and insulation.

Materials to do a built up roof.

Built up roofing also called bur is the most common roofing material used on low slope roofs. Asphalt built up refers to several layers of reinforcing felt between asphalt and plies or coal tar bitumen which are covered with a surfacing material that. Bitumen ply sheets and a surface material such as asphalt or gravel. Each material has its own advantages and disadvantages and any of them can be the right choice depending on your building climate and budget.

Comparing 7 roofing materials for longevity cost calculations. Built up roofs or burs also called a tar and gravel roof is a well established and popular style of flat roof that is made up of alternating layers of roofing felt or fiberglass and asphalt that is applied with heat which combine to make a long lasting sturdy roofing system. A final coating seals everything in and competes the process. But how do you know which choice is best for your project.

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. Built up roof membranes bur have been in use on united states houses for over a century. Asphalt built up is the most common form of roofing used for low sloped roofs 2 12 in america constituting a large percentage of the overall number of roofs in the united states. In this installment we look at built up roofing.

Built up roofing contains three materials. Asphalt roll roofing is made from large rolls of the same material used in asphalt shingles. Built up roofing systems. Bur is preferred for low slope or flat roofs because it creates a continuous sealed surface.

Coal tar is the more durable of the two bitumen products and is made using by products of coal production. There are two main types of built up roofs and each is categorized by the binding agent or bitumen that is used. The variety of single ply roofing membrane adhesives available gives contractors some flexibility in their choice of material. Built up roof membranes.

Here s a layer by layer explanation. Environment weather and. The layers of insulation are called ply sheets and they are usually reinforced with fiberglass or an organic material. It consists of an impervious membrane assembled from layers of bituminous saturated felt which are cemented to each other and to the roof deck with bituminous cement usually asphalt or coal.

For the sake of comparison we ve offered average national costs based a 2 000 square foot house with.