How Thick Is 15 Roofing Felt

Unrolled length that combine to provide over 430 sq.

How thick is 15 roofing felt.

The 15 pound was for lighter weight projects while the 30 offered more heavy duty protection. Organic dry felt is made from 100 post consumer recycled material. The standard types of felt are 15 and the more waterproof 30. 15 pounds per hundred square feet and 30 pounds per hundred square feet.

The main advantage of using felt roofing underlayment is cost. This gardner asphalt 15 432 sq. 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.

For many years roofers used asphalt saturated felt under roofing shingles and it was historically available in two standard weights. Thickness roofing felt s thickness is not a measurement of its depth because it is thin similar to heavy paper. No 15 felt and no. The numbers ihad a correlation to the weight not the thickness.

Its main purpose is to prevent moisture from leaking into a roof. The most commonly used felts are 15 and 30 with weights of 8 and 20 pounds per 100 square feet. 30 felt is typically thicker stronger and may be less prone to tearing or ripping off during installation or weather events. 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.

Felt roofing underlayment is typically available in two types. Of coverage for residential and commercial roofing projects. Roofing felt s thickness is actually measured in pounds per square with one square equaling 100 feet of roofing material. Roll saturated felt underlayment 15 astm 4869 type i is an authentic asphalt 15 astm 4869 type i is an authentic asphalt saturated organic felt underlayment is used as a breathable secondary weather resistant barrier when applied over the roof deck prior to the installation of the primary roofing product.

Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof the type i recommend depends on roof slope. Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. The best weight for roofing felt is the 30 pound product because it provides thicker and.