3 4 Built Up Roofing

Corps of engineers commentary on roofing systems some general criteria for system selection and aspects of protected membrane and vegetated roof systems.

3 4 built up roofing.

Owens corning roofing and asphalt. 6 4 built up roofing over nailable decks 6 4 1 these specifications are for use over any type of structural. Each system is designed to waterproof the roof and protect it from sun rain snow and more. Bitumen ply sheets and a surface material such as asphalt or gravel.

The modified bitumen is a cap sheet for a built up roof that is used in lieu of gravel although it works well by itself on a sloped roof with positive drainage or no standing water. This prevent leaks mold and rot all of which can weaken the roofing structure and cause costly damage. Asphalt roofing solutions 101 asphalt is one of the oldest roofing technologies still in use today and it is a reliable solution for both residential and commercial roofing needs. Built up roofing contains three materials.

Bitumen material ply sheets and one or more surfacing materials. There are 3 main types of flat roofing systems. Felt tar and slag roofing 5 ply 5 3 lb m ft 2 25 9 kg m 2 ceramic slate 5 8 lb m ft 2 28 3 kg m 2 reconstituted slate 4 4 lb m ft 2 21 5 kg m 2 clay tile 10 8 lb m ft 2 52 7 kg m 2 asphalt roll roofing 1 1 lb m ft 2 5 4 kg m 2 concrete tile 9 3 lb m ft 2 45 4 kg m 2 slate 1 4 to 3 16 thick 9 1 lb m ft 2 44 4 kg. Learn about the variety of installation methods and roofing system options including bur built up roof sbs and app.

Built up roof membrane 3 ply smooth surfaced. Built up roof bur modified bitumen and single ply. Here s a layer by layer explanation. This column will look at how the corps addressed bituminous built up roofing systems.

Built up roof membrane 3 ply gravel surfaced. Carson dunlop s sketch illustrates a 4 ply built up roof installation. No the bur is one of many flat roof systems. Built up roof membrane 4 ply gravel surfaced.

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 tar pitch. We have found an occasional bur on steeper slopes including a tar and gravel steep slope roof whose gravel kept washing down into the building s gutter. The tpo is a single ply roof. Most built up roofing is comprised of three parts.

Owens corning roofing and asphalt. The bitumen can be either hot meaning it is heated so that it liquefies during installation or it can be cold which is more like an adhesive and is not heated. Click to enlarge any image built up roofing is usually used on flat or low slope roofs less than 3 rise in 12 of run. 6 3 3 non nailable specifications are denoted by an i as the third character in the specification designation e g 4gig.