Gypsum Board Roof Decking

5 8 densdeck roof boards can replace any generic type x gypsum board in.

Gypsum board roof decking.

Gypsum or lightweight concrete deck. 5 8 15 9 mm gypsum board underlayment roof covering combustible panel sheathing felt install 5 8 in. Bulb tees are high strength lightweight steel sections. 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.

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. The gypsum concrete which spans tee to tee encases the tees and. These include office complexes schools public buildings shopping malls and warehouses located throughout the united states. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks.

Old bald asphalt roof over wet fiberboard over asphalt felts and the white. Gypsum or lightweight concrete deck. Click on an image to enlarge. Gypsum concrete roof deck system.

This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate. The top of the metal banded material will look like white sheet rock. All gypsum board end joints should occur. 15 9 mm type x gypsum board over the en tire roof area.

Examples of gypsum roof decks. Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks. Shown to withstand delamination deterioration warping and job site damage far more effectively than paper faced gypsum board and other conventional roofing products such as wood fiberboard and perlite certified by ul for use as a fire barrier over combustible and noncombustible decks in accordance with the ansi ul 790 and ulc s114 test standard. Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.

Apply the gypsum board perpendicular to and on top of roof trusses or rafters prior to the installation of combus tible roof sheathing. The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center. The bulb tees which are very strong vertically but quite flexible horizontally provide the long span strength. The sustainable design has earned independent certification from scientific certification systems.

Formboards placed between the bulb tees contain the fast. Gypsum or lightweight concrete deck. 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.