How Thick Is 15 Roofing Felt

Thickness roofing felt s thickness is not a measurement of its depth because it is thin similar to heavy paper.

How thick is 15 roofing felt.

Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof the type i recommend depends on roof slope. 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. 15 specification felt general information 15 specification felt astm d4869 type ii d226 type i atlas provides a complete selection of roofing felts or roofing paper. 15 lb refers to the thickness of the paper.

The 15 pound was for lighter weight projects while the 30 offered more heavy duty protection. 15 felt is about 030 and 30 felt is about 062. No 15 felt and no. Roofing paper is an essential layer in the roofing process as it acts as extra protection from the elements.

The main advantage of using felt roofing underlayment is cost. This product acts as a secondary layer of protection from wind driven rain ice damm. 15 pounds per hundred square feet and 30 pounds per hundred square feet. 30 felt is typically thicker stronger and may be less prone to tearing or ripping off during installation or weather events.

Roofing felt s thickness is actually measured in pounds per square with one square equaling 100 feet of roofing material. This product is applied directly to the roof deck on sloped roofs and used under asphalt shingles wood shakes and tiles. Felt is also available in 30 lb. The most commonly used felts are 15 and 30 with weights of 8 and 20 pounds per 100 square feet respectively.

Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. Roofing felt s thickness is actually measured in pounds per square with one square equaling 100 feet of roofing material. For many years roofers used asphalt saturated felt under roofing shingles and it was historically available in two standard weights. The most commonly used felts are 15 and 30 with weights of 8 and 20 pounds per 100 square feet respectively.

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. Felt roofing underlayment is typically available in two types. The best weight for roofing felt is the 30 pound product because it provides thicker and.