Required Thickness Cover Board Roof

The cover board should be secured to the bottom layer of insulation in a full and even application of hot asphalt applied at a rate of 30 pounds per square or specially formulated adhesive.

Required thickness cover board roof.

Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks. Cover boards should be set over the bottom layer of insulation. 4 1219 mm 1 8 3 mm.

Cover boards also serve as a fi re barrier protecting the roof from external fi re. Composed of a closed cell polyisocyanurate foam core bonded in the foaming process to 1 2 thick duraboard an expanded perlite mineral aggregate board on one side and a fiber glass reinforced facer on the other. It s light weight provides ease of handling. Densdeck roof boards are utilized in a wide variety of roofing systems for new and re roofing applications as gypsum roof cover boards and thermal barriers.

Meets the requirements of astm c 1177. Coated fiberglass facer ideal for fully adhered systems provides a broader compatibility and higher performance with roofing adhesives. Structodek is lightweight compared to many other roofing cover boards and it is fiberglass free and cuts with a standard utility knife. Hail damage on a roof without a cover board can easily pierce the insulation which will increase the heat fl ow through it thereby increasing the energy cost of the building.

It is a flexible durable inexpensive covering for roofs because each panel will cover 32 square feet. For example inch gypsum board weighs around 2 lbs sq ft. Some cover boards are very heavy making them difficult to handle slowing down work and potentially adding labor costs. Those above 1 4 inch.

It comes in multiple thicknesses from 1 4 inch to at least 1 inch. Fm class 1 for fire barrier requirements and ul class a unlimited slope with excellent surface burning characteristics. Rigid roof insulation board. Stocked in 12 locations around the country to facilitate job start ups and completions structodek is available in 4 x4 and 4 x8 boards w56 358 8531 for a 4 x4 x board and w56 358 8532 for.

Compared to inch hd polyiso board at 0 34 lbs sq ft. Insulation cover boards training and education take advantage of industry leading training and education though care the center for the advancement of roofing excellence. 1 2 12 7 mm 1 32 0 8 mm width standard.