Flat Bug Or Flat Built Up Gypsum Roof

Gaf conventional built up roof system for concrete decks.

Flat bug or flat built up gypsum roof.

Gaf conventional built up roof system for wood decks. Flat roof systems are a bit of an outlier. Has the deck been deformed or deflected to the point where it ponds water. If you find any good info please post it in here and i ll do the same.

Gaf conventional built up roof systems for wood decks. Gypsum decks incorporated the placement of bulb tees. Gaf ruberoid modified bitumen roof systems for gypsum decks. Doing a building assessment to see if we can bring a 45 year old building up to current code.

Condition of the roof deck is it corroded detached damaged or unsafe. 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. There s a lot to know about flat roof systems and how they. Old gypsum roof board jimluckn civil environmental.

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. None 72 00 cedar shingles none 1 x 4 8 o c. Type x gypsum board none 76 35. Most modern residential homes have relatively steep pitches.

Gaf conventional built up roof systems for cementitious wood fiber decks. In general built up roofing tends to fare better in warmer climates than in cold regions. Flat roofs make replacing a roof a challenge. However in many u s.

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. None 2 55 5 10 cedar shingles none type x gypsum 1 x 4 8 o c. Poured gypsum concrete co ncrete block or 2 0. Drill tec accutrac flat.

11 08 18 page 5 of 27 approved fasteners. Built up roofs account for a large percentage of the commercial roofing systems in the. 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. The marks appear similar to a bug smear on a.

Its use increased since it provided roof deck fire protection diaphragm values and an economical substrate for roofing. 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.