How Thick Is 15 Roofing Felt

15 pounds per hundred square feet and 30 pounds per hundred square feet.

How thick is 15 roofing felt.

Roofing felt also called roofing felt paper is underlayed on roofs before shingles are added. For many years roofers used asphalt saturated felt under roofing shingles and it was historically available in two standard weights. The standard types of felt are 15 and the more waterproof 30. Organic dry felt is made from 100 post consumer recycled material.

Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. 30 felt is typically thicker stronger and may be less prone to tearing or ripping off during installation or weather events. The main advantage of using felt roofing underlayment is cost. Roofing felt s thickness is actually measured in pounds per square with one square equaling 100 feet of roofing material.

Unrolled length that combine to provide over 430 sq. Felt roofing underlayment is typically available in two types. This gardner asphalt 15 432 sq. In my opinion felt paper is a vapor barrier plus keeps the oils in the shingles from leaching out and into the wood substrate i e.

The numbers ihad a correlation to the weight not the thickness. Felt has a 36 in. The 15 pound was for lighter weight projects while the 30 offered more heavy duty protection. Width and a 144 ft.

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. Thickness roofing felt s thickness is not a measurement of its depth because it is thin similar to heavy paper. The best weight for roofing felt is the 30 pound product because it provides thicker and. Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof the type i recommend depends on roof slope.

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. Of coverage for residential and commercial roofing projects. Its main purpose is to prevent moisture from leaking into a roof.