Gypsum Roof Deck Repair

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

Gypsum roof deck repair. These include office complexes schools public buildings shopping malls and warehouses located throughout the united states. Mill formulated and composed of specially calcined gypsum and wood chips or shavings. This is usually because low quality leak prone decking materials such as epdm rubber are used often in an effort to save money. This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate.

Type f roof deckfinishes primed gray g60 galvgauges 18 20 22sizes 36 x20 2 36 x24 2 the inverted tee or bulb tee holds the 3 x 4 form board panels and is welded to the steel bar joist. Provides excellent fire performance non combustible in accordance with astm e136 and it s fire rated and approved for use in ul roof deck. Unfortunately many homeowners who have a flat deck roof have to deal with frequent leaks. Of roof decking costs 800 2 800 to install depending on the material you choose.

Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks. 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. Damage that can cause loss of the structural composite strength is most likely to come from leakage of water into the roof deck from unattended roof leaks. Poured gypsum decks provide stable structural properties if kept moisture free.

Venting lwic installed over structural concrete and other non venting substrates. Picture story of gypsum roof deck repair sequence nrdca 600 guideline for application of cementitious wood fiber roof deck systems technical bulletin 1001. Bulb tees are high strength lightweight steel sections. Gypsum concrete roof deck system gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.

Formboards placed between the bulb tees contain the fast. Introduced as a roof deck substrate in the 1940 s. Free water will cause the gypsum concrete to decompose and lose structural strength.