15 Or 30 Roofing Felt

This felt will help prevent damage to your roof from wind driven rain and water from other sources.

15 or 30 roofing felt.

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 type i recommend depends on roof slope. Asphalt saturated material for excellent waterproofing heavy duty felt design lays flat and minimizes wrinkling. Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment.

Felt roofing underlayment is typically available in two types. 30 was used as a base sheet for built up roofing and underlayment under slate tile and shingles. Felt roof deck protection. Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof.

Helps reduce the possibility of leaks. Heavier shingles may help to keep felt from pushing up but then again maybe they won t. It is thicker and heavier than the alternative 15 so if water ever gets under your shingles it has to work extra hard to get through the felt. The 15 pound was for lighter weight projects while the 30 offered more heavy duty protection.

No 15 felt and no. Felt paper is commonly produced with a certain number of recycled products and coated with asphalt. 15 is easy to rip underfoot when installing the new roof system and ripped felt paper is useless regardless of weight. In the old days common felt was 15 lb felt and 30 lb felt and a roll of the first held 4 squares and weighed 60 lbs while a roll of the second held 2 squares and weighed 60 lbs.

Weight matters asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. Add an extra layer of protection between your shingles and roof deck with this 30 216 sq. For many years roofers used asphalt saturated felt under roofing shingles and it was historically available in two standard weights. 15 came perforated for use as a ply sheet for built up roofing use and non perforated.

For slopes less than 4 12 i recommend 2 layers of 15. Item 656632 model 0903000. 30 felt is typically thicker stronger and may be less prone to tearing or ripping off during installation or weather events. When the vapor hits the roofing felt the felt expands which in turn pushes up the shingles.

15 lb felt paper weighed 15 pounds per 100 sq. We use the 30 felt paper because i feel it is the best product for your roof. 15 pounds per hundred square feet and 30 pounds per hundred square feet. Problem is the felt doesn t flatten out even when it dries so the ridges don t go away.