Weight Of Roofing Felt Psf

Heavy materials have great thermal mass.

Weight of roofing felt psf.

With a low weight roofing material as many as 300 squares or even more may fit on a semi truck but weight limitations can hold that to 20 30 squares for very heavy roofing materials. The weight of roofing constructions above the truss rafter may be estimated with the calculator below. By shifting the pound symbol 15 felt became 15 felt which may actually weigh 7 5 to 12 5 pounds per square. 15 felt type construction helps provide an extra layer of protection between your shingles and your roof deck not included heavy duty design lays flat to help minimize wrinkling asphalt saturation to help improve waterproofing ability to help prevent wind driven rain and water from other sources from infiltrating under your shingles and.

30 felt can weigh between 16 and 27. On a roof with a slope greater than 4 to 12 the live load limit is typically adjusted downward from 20 psf to 15 psf to allow for the relatively greater dead load on the steeper roof. 348 s tructural w ood d esign preengineered framing roof trusses span ft weight psf of horizontal plan area 30 5 0 35 5 5 40 6 0 50 6 5 60 7 5 80 8 5 100 9 5 120 10 5 150 11 5 floor joists i joists and open web. The best weight for roofing felt is the 30 pound product because it provides thicker and.

Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. Material composition roofing felt 3 ply 1 5psf felt 5 ply 2 5psf rigid insulation temlock 1 thick 1 2psf cord 1 thick 0 7psf gold bond 1 thick 1 5psf styrofoam 1 thick 0 2psf foam glass 1 thick 0 8psf rigid fiberglass 1 thick 1 5psf roll or batt insulation rock wool 1 thick 0 2psf glass wool 1 thick 0 06psf alpol 0 1psf. The following table provides typical weights dead load self weight for various roofing materials where possible the values were taken directly from manufacturer technical data sheets and are the actual weights of specific representative products. In the past the felt number designation was correlated to the weight of the felt i e a 15 felt weighed 15 pounds 100 square feet.

However that direct correlation to weight no longer exists. While this thermal mass can offer some nominal r value it also holds heat.