Roofing Felt Thickness Mm

The most commonly used felts are 15 and 30 with weights of 8 and 20 pounds per 100 square feet respectively.

Roofing felt thickness mm.

Roofing felt s thickness is actually measured in pounds per square with one square equaling 100 feet of roofing material. Add an extra layer of protection between your shingles and roof deck with this 30 216 sq. Asphalt saturated material for excellent waterproofing. Of course how many rolls you need will depend on the size of the roof so ensure you measure correctly.

It s available in rolls that are 8m long and 1m wide with a thickness of 4 2mm mineral or 3 8mm sand. They were originally designed as the tough top sheet on a two layer flat roof system but are used where a longer life expectancy is sought. Heavy duty felt design lays flat and minimizes wrinkling. Roofing felt s thickness is actually measured in pounds per square with one square equaling 100 feet of roofing material.

Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. Thickness roofing felt s thickness is not a measurement of its depth because it is thin similar to heavy paper. Anderson tecnatorch sbs torch on mineral felt capsheet is used as the final layer of the felt roofing process. The green mineral finish on heavy duty roofing felt is larger than that used on shed felt.

This felt will help prevent damage to your roof from wind driven rain and water from other sources. Roofing felt is comprised of a base made from natural materials such as wood cellulose or synthetic ones such as fiberglass or polyester and then coated or saturated with a protective coating such as bitumen asphalt which repels water but still allows the product to breathe. Apart from being twice as thick as normal felt the other noticeable difference is that the green mineral finish is made with coarser grains 2 4 mm. 30 pound roofing felt it is not paper it s made from either fiberglass or polyester that s been bound together with asphalt costs the same per roll as 15 pound felt but there are 216 square.

The best weight for roofing felt is the 30 pound product because it provides thicker and. Roofing felt s thickness is not a measurement of its depth because it is thin similar to heavy paper. Heavy duty roofing felts are not specifically designed for sheds.