Flat Bug Or Flat Built Up Gypsum Roof

Condition of the roof deck is it corroded detached damaged or unsafe.

Flat bug or flat built up gypsum roof.

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. Drill tec accutrac flat. Gaf conventional built up roof system for wood decks. 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.

11 08 18 page 5 of 27 approved fasteners. Gaf conventional built up roof systems for wood decks. Flat roofs make replacing a roof a challenge. Flat roof systems are a bit of an outlier.

Gaf ruberoid modified bitumen roof systems for gypsum decks. Densdeck roof board gypsum board georgia pacific gypsum llc. Gypsum poured over formboards has been used as a substrate for roofing materials since the 1940 s. In general built up roofing tends to fare better in warmer climates than in cold regions.

The marks appear similar to a bug smear on a. However in many u s. Type x gypsum board none 76 35. 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.

Has the deck been deformed or deflected to the point where it ponds water. And it has the 1 2 gyp board 2 gypsum roof over metal joists. Poured gypsum concrete co ncrete block or 2 0. Most modern residential homes have relatively steep pitches.

Built up roofs account for a large percentage of the commercial roofing systems in the. Gypsum decks incorporated the placement of bulb tees. There s a lot to know about flat roof systems and how they. None 2 55 5 10 cedar shingles none type x gypsum 1 x 4 8 o c.

None 72 00 cedar shingles none 1 x 4 8 o c. If you find any good info please post it in here and i ll do the same. 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. Gaf conventional built up roof systems for cementitious wood fiber decks.

Doing a building assessment to see if we can bring a 45 year old building up to current code. Gaf conventional built up roof system for concrete decks.