Gypsum Roof Decking

The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center.

Gypsum roof decking. Gypsum deck plank for roof decks. Gypsum concrete roof deck systems consist of a form board wire reinforcement and a poured application of gypsum concrete. For fire rated roof decks weld per fire test assembly. Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks.

Bulb tees are high strength lightweight steel sections. Old bald asphalt roof over wet fiberboard over asphalt felts and the white is a gypsum deck. Venting lwic installed over structural concrete and other non venting substrates. If the deck is sound it may be possible to treat the deck much like concrete by priming the surface adhering thermal insulation and installing a new roof membrane.

Securock brand gypsum fiber roof board s dense concentration of gypsum and cellulose fibers provides exceptional panel and bond strength low surface absorption and superior wind uplift performance with no face layer to delaminate. This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate. Keydeck mesh is made up of 2 hexagonal mesh composed of woven 19 gauge galvanized wires with an additional 16 gauge galvanized longitudinal wire placed at every 3 interval of its width. Picture story of gypsum roof deck repair sequence nrdca 600 guideline for application of cementitious wood fiber roof deck systems technical bulletin 1001.

Use minimum 13 mm 1 2 inch fillet welds on alternate sides of sub purlins both sides at end joints to main purlins. Gypsum concrete roof deck system. The sustainable design has earned independent certification from scientific certification systems. The top of the metal banded material will look like white sheet rock.

Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets. If one is considering mechanically fastening a base. Place plank on lower flanges of sub purlins or other framing with ends and edges supported. Introduced as a roof deck substrate in the 1940 s.

The bulb tees which are very strong vertically but quite flexible horizontally provide the long span strength. Formboards placed between the bulb tees contain the fast. Densdeck roof boards are easy to. The gypsum concrete which spans tee to tee encases the tees and.

The poured gypsum roof deck consists of steel bulb tees a form board usually composed of gypsum or fiberglass wire reinforcing mesh and the gypsum concrete.