Weight Of Built Up Roofing System

Components of a bur system two basic components felts and bitumen are laminated in the field built up to form a roofing membrane.

Weight of built up roofing system.

No filters are available. Built up roofing systems. 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.

Meets the requirements of astm d 3909. Built up roofs have less defects than epdm systems. Provide protection to the underlying bitumen and membrane and have a low maintenance cost. The bitumen is usually asphalt astm d 312 or coal tar pitch astm d 450.

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. Also coal tar built up membrane systems should be detailed in accordance with manufacturer requirements. Low moisture excellent dimensional stability and resistance to rot make it an ideal replacement for organic cap sheets. Especially at drains scuppers and roof edges.

1 lb m ft 2 4 88 kg m 2. They have the experience and ability to build you the best and strongest roof possible and they choose. Asphalt coated fiber glass reinforcement mat. 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.

The weight of truss rafter must be added to calculate the dead load of the roof. And no lap defects punctures or shrinkage problems were reported for bur systems. The bitumen serves as both the system adhesive and the waterproofing agent. Designers should specify coal tar for use in coal tar built up roof membranes comply with astm standard d450 type i.

This price range can change depending on the materials you choose. 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. Built up roofing contractors and their roofers are trained professionals committed to the bur industry. Learn about built up roofing systems.