Roof Cover Board Thickness

5 8 thickness meets the requirements of type x per astm c 1177.

Roof cover board thickness.

Available wood thickness standard 7 16 or 5 8 thick rated 1 osb. Fully adhered cover boards should be applied in accordance with proper roofing procedures. Fm class 1 for fire barrier requirements and ul class a unlimited slope with excellent surface burning characteristics. Insulation damage results in a reduction of the roof s thermal resistance or r value.

Insulation cover boards training and education take advantage of industry leading training and education though care the center for the advancement of roofing excellence. R values 28 tested in accordance with astm c518 spannings. The 1 architecturally specified fiberglass mat gypsum roof cover board for nearly 30 years 1. 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.

Structodek is lightweight compared to many other roofing cover boards and it is fiberglass free and cuts with a standard utility knife. Wood edges are routed 1 8 to allow for expansion and contraction of the wood. In addition national roofing contractors association nrca has issued bulletins over the years recommending the use of cover boards to minimize damage to polyiso. 1 4 spans flute widths up to 2 5 8 flexural strengths parallel lbs.

Without a cover board the roof is missing added durability. The greatest risks to roofs aren t always seen. Meets the requirements of astm c 1177. Hail is damaging to insulation but by using a cover board the impact is minimized.

R value is the measure. Superior dimensional stability over competitive gypsum fiber boards is due to their low coefficient of thermal and hygrometric expansion. 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. 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.

Coated fiberglass facer ideal for fully adhered systems provides a broader compatibility and higher performance with roofing adhesives. To prevent blistering with built up roof membranes bur and to provide a separation layer and flat surface in re cover situations. Cover boards should be set over the bottom layer of insulation. 1 4 dens deck roof board.