Types Of Built Up Roofing

These roof systems are commonly referred to as tar and gravel roofs.

Types of built up roofing. Built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed. Built up roof membranes referred to by the acronym bur have been in use in the u s. For over 100 years. Built up roof bur modified bitumen roof mbr and rubber membrane roof epdm.

Hot asphalt bitumen is the bonding and waterproofing agent between layers. Built up systems are installed by alternating layers of asphalt or tar and supporting fabrics directly onto the roof. One special type of built up roofing called ballasted roofing uses large stones about 1 1 2 to 2 1 2 inches in diameter for the surface layer. The three most common bur types are.

Which material you ll use depends on the size design and of course the budget of your roofing project. This roofing system contains alternating layers of bitumen asphalt tar coal tar and reinforcing fabric and is then finished with an aggregate layer like gravel or stone. These roof systems are commonly referred to as tar and gravel roofs. With a ballasted system the lower layers are not adhered or fastened to the roof structure and the heavy surface layer keeps the roofing in place.

Types of built up roofing common bitumen materials used in built up roofing systems are asphalt tar and coal tar as a cold applied adhesive. Built up roofing systems have been in use in the u s. For more than 100 years. Bur built up roofing system a traditional built up roofing bur system derives its name from the building of a roof on site using layers of base sheet interply sheets and cap sheet or other surfacing such as gravel or liquid coating.

Built up roofing also known as bur is roofing material for low slope roofs. A bottom layer or two of insulation board multiple intermediate layers of tar or asphalt alternated with layers of roofing felt and a top layer of gravel. Bur consists of many layers.