Required Thickness Cover Board Roof

Compared to inch hd polyiso board at 0 34 lbs sq ft.

Required thickness cover board roof.

4 1219 mm 1 8 3 mm. Rigid roof insulation board. 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. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks.

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. For example inch gypsum board weighs around 2 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. Fully adhered cover boards should be applied in accordance with proper roofing procedures.

Also some boards notably perlite and fiber boards don t cut cleanly and often create nuisance dust. 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. Those above 1 4 inch. 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.

It comes in multiple thicknesses from 1 4 inch to at least 1 inch. It is a flexible durable inexpensive covering for roofs because each panel will cover 32 square feet. Cover boards also serve as a fi re barrier protecting the roof from external fi re. Fm class 1 for fire barrier requirements and ul class a unlimited slope with excellent surface burning characteristics.

Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0. 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. It s light weight provides ease of handling. 1 2 12 7 mm 1 32 0 8 mm width standard.

Meets the requirements of astm c 1177. 5 8 thickness meets the requirements of type x per astm c 1177. Structodek is lightweight compared to many other roofing cover boards and it is fiberglass free and cuts with a standard utility knife.