Flat Bug Or Flat Built Up Gypsum Roof

Built up roofs account for a large percentage of the commercial roofing systems in the.

Flat bug or flat built up gypsum roof.

However in many u s. None 2 55 5 10 cedar shingles none type x gypsum 1 x 4 8 o c. 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. Densdeck roof board gypsum board georgia pacific gypsum llc.

Drill tec accutrac flat. Gaf conventional built up roof system for wood decks. Gypsum decks incorporated the placement of bulb tees. If you find any good info please post it in here and i ll do the same.

Flat roof systems are a bit of an outlier. Flat roofs make replacing a roof a challenge. 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. There s a lot to know about flat roof systems and how they.

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. None 72 00 cedar shingles none 1 x 4 8 o c. Cities with older housing stock think federal hill in baltimore or alexandria virginia s old town the roofs are often flat or have very low slopes.

Doing a building assessment to see if we can bring a 45 year old building up to current code. Gaf conventional built up roof systems for wood decks. Old gypsum roof board jimluckn civil environmental. The marks appear similar to a bug smear on a.

Type x gypsum board none 76 35. 11 08 18 page 5 of 27 approved fasteners. Gaf conventional built up roof system for concrete decks. Most modern residential homes have relatively steep pitches.

Gaf conventional built up roof systems for cementitious wood fiber decks. Poured gypsum concrete co ncrete block or 2 0. Gaf ruberoid modified bitumen roof systems for gypsum decks. 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.

In general built up roofing tends to fare better in warmer climates than in cold regions. And it has the 1 2 gyp board 2 gypsum roof over metal joists.