Roof Cover Board Thickness

Insulation cover boards training and education take advantage of industry leading training and education though care the center for the advancement of roofing excellence.

Roof cover board thickness.

Cover boards have historically had two uses. 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. 5 8 thickness meets the requirements of type x per astm c 1177. Fm class 1 for fire barrier requirements and ul class a unlimited slope with excellent surface burning characteristics.

Available wood thickness standard 7 16 or 5 8 thick rated 1 osb. Hail is damaging to insulation but by using a cover board the impact is minimized. Insulation damage results in a reduction of the roof s thermal resistance or r value. The building is more susceptible to hail fi re and wind damage.

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. Fully adhered cover boards should be applied in accordance with proper roofing procedures. Superior dimensional stability over competitive gypsum fiber boards is due to their low coefficient of thermal and hygrometric expansion. Meets the requirements of astm c 1177.

R value is the measure. To prevent blistering with built up roof membranes bur and to provide a separation layer and flat surface in re cover situations. R values 28 tested in accordance with astm c518 spannings. The greatest risks to roofs aren t always seen.

Cover boards should be set over the bottom layer of insulation. Learn how adding a densdeck prime or densdeck stormx prime roof board to your roof assembly can help thwart the common damage inflicted by water wind fire puncture and more. Can be used as a cover board in re roofing and new construction proven to reduce the tendency for blistering in hot asphalt applications. The 1 architecturally specified fiberglass mat gypsum roof cover board for nearly 30 years 1.

1 4 spans flute widths up to 2 5 8 flexural strengths parallel lbs. Without a cover board the roof is missing added durability. 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.