Weight Of Built Up Roofing System

Meets the requirements of astm d 3909.

Weight of built up roofing system.

Low moisture excellent dimensional stability and resistance to rot make it an ideal replacement for organic cap sheets. They have the experience and ability to build you the best and strongest roof possible and they choose. Get to know more about one of the most popular commercial roofing systems. 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.

Also coal tar built up membrane systems should be detailed in accordance with manufacturer requirements. The weight of truss rafter must be added to calculate the dead load of the roof. The bitumen is usually asphalt astm d 312 or coal tar pitch astm d 450. Built up roofs have less defects than epdm systems.

Built up roofing systems. Components of a bur system two basic components felts and bitumen are laminated in the field built up to form a roofing membrane. 1 lb m ft 2 4 88 kg m 2. Asphalt coated fiber glass reinforcement mat.

Glaskap is used as a cap sheet in a variety of built up roofing systems. Especially at drains scuppers and roof edges. Learn about built up roofing systems. Provide protection to the underlying bitumen and membrane and have a low maintenance cost.

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. A built up roof for example will typically include the built up membrane itself with or without gravel as well as some kind of insulation and cover board which will vary in thickness from roof to roof. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary. No filters are available.

Designers should specify coal tar for use in coal tar built up roof membranes comply with astm standard d450 type i. 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. And no lap defects punctures or shrinkage problems were reported for bur systems. This price range can change depending on the materials you choose.