Gypsum Board Roof Decking

15 9 mm type x gypsum board over the en tire roof area.

Gypsum board roof decking.

Formboards placed between the bulb tees contain the fast. The sustainable design has earned independent certification from scientific certification systems. Examples of gypsum roof decks. Gypsum deck from underneath.

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 or lightweight concrete deck. Old bald asphalt roof over wet fiberboard over asphalt felts and the white. Bulb tees are high strength lightweight steel sections.

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 top of the metal banded material will look like white sheet rock. Gypsum or lightweight concrete deck. Apply the gypsum board perpendicular to and on top of roof trusses or rafters prior to the installation of combus tible roof sheathing.

These include office complexes schools public buildings shopping malls and warehouses located throughout the united states. 5 8 densdeck roof boards can replace any generic type x gypsum board in. All gypsum board end joints should occur. Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.

Click on an image to enlarge. Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0. Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks. The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center.

Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks. 5 8 15 9 mm gypsum board underlayment roof covering combustible panel sheathing felt install 5 8 in. Gypsum concrete roof deck system. 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. The gypsum concrete which spans tee to tee encases the tees and. Gypsum or lightweight concrete deck.