Flat Bug Or Flat Built Up Gypsum Roof

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Flat bug or flat built up gypsum roof.

None 2 55 5 10 cedar shingles none type x gypsum 1 x 4 8 o c. Densdeck roof board gypsum board georgia pacific gypsum llc. Built up roofing lifespan depending on the climate and the specific materials used built up roofing has an average life expectancy of 15 to 30 years but some constructions can last up to 40 years. Type x gypsum board none 76 35.

11 08 18 page 5 of 27 approved fasteners. Gaf conventional built up roof systems for wood decks. Gaf conventional built up roof systems for cementitious wood fiber decks. 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.

Has the deck been deformed or deflected to the point where it ponds water. Built up roofs account for a large percentage of the commercial roofing systems in the. Fig 4 is the deck capable of handling a heavier roof system such as replacing a built up roof membrane 4 10 psf with a ballasted single ply system 10 20 psf. Drill tec accutrac flat.

Condition of the roof deck is it corroded detached damaged or unsafe. If you find any good info please post it in here and i ll do the same. None 72 00 cedar shingles none 1 x 4 8 o c. Flat roof systems are a bit of an outlier.

Doing a building assessment to see if we can bring a 45 year old building up to current code. Poured gypsum concrete co ncrete block or 2 0. Old gypsum roof board jimluckn civil environmental. There s a lot to know about flat roof systems and how they.

However in many u s. Flat roofs make replacing a roof a challenge. Gaf conventional built up roof system for concrete decks. Gypsum decks incorporated the placement of bulb tees.

Most modern residential homes have relatively steep pitches. Built up roof none type x gypsum plywood none 27 40 built up roof none plywood type x gypsum board none 67 00 cedar shingles none 1 x 4 8 o c. Gaf ruberoid modified bitumen roof systems for gypsum decks. In general built up roofing tends to fare better in warmer climates than in cold regions.

Gypsum poured over formboards has been used as a substrate for roofing materials since the 1940 s. And it has the 1 2 gyp board 2 gypsum roof over metal joists.