Weight Of Built Up Roofing System

Built up roofing systems.

Weight of built up roofing system.

The bitumen is usually asphalt astm d 312 or coal tar pitch astm d 450. The bitumen serves as both the system adhesive and the waterproofing agent. Meets the requirements of astm d 3909. Learn about built up roofing systems.

Designers should specify coal tar for use in coal tar built up roof membranes comply with astm standard d450 type i. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary. Components of a bur system two basic components felts and bitumen are laminated in the field built up to form a roofing membrane. Low moisture excellent dimensional stability and resistance to rot make it an ideal replacement for organic cap sheets.

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. They have the experience and ability to build you the best and strongest roof possible and they choose. 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.

Glaskap is used as a cap sheet in a variety of built up roofing systems. Especially at drains scuppers and roof edges. Asphalt coated fiber glass reinforcement mat. Built up roofing contractors and their roofers are trained professionals committed to the bur industry.

1 lb m ft 2 4 88 kg m 2. 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 roofs have less defects than epdm systems. Provide protection to the underlying bitumen and membrane and have a low maintenance cost.

No filters are available. 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. Get to know more about one of the most popular commercial roofing systems.