15 Or 30 Pound Felt On Roof

The main advantage of using felt roofing underlayment is cost.

15 or 30 pound felt on roof.

The difference between 15 lb and 30 lb roofing felt paper. One roofing square and 30 lb felt paper weighed 30 pounds per square. 15 pounds per hundred square feet and 30 pounds per hundred square feet. 15 came perforated for use as a ply sheet for built up roofing.

30 felt is typically thicker stronger and may be less prone to tearing or ripping off during installation or weather events. Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. 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.

Roofing underlayment 15 lb felt. 15 astm 4869 type i is an authentic 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. 15 lb felt paper weighed 15 pounds per 100 sq. 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.

Felt paper is commonly produced with a certain number of recycled products and coated with asphalt. Organic dry felt is made from 100 post consumer recycled material. Item 656632 model 0903000. Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment.

15 asphalt felt roofing underlayment provides an extra layer of protection between your shingles and your roof deck. Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof the type i recommend depends on roof slope. This underlayment features excellent asphalt saturation for effective waterproofing. For many years roofers used asphalt saturated felt under roofing shingles and it was historically available in two standard weights.

The 15 pound was for lighter weight projects while the 30 offered more heavy duty protection. 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.