15 Lb Or 30 Lb Felt For Roof

One roofing square and 30 lb felt paper weighed 30 pounds per square.

15 lb or 30 lb felt for roof. What is roofing felt. Since 30 pound paper is quite a bit thicker you might want to use underneath upstairs flooring applications where the sounds of footsteps can be heard more frequently throughout the house. No doubt about it. Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights.

Labor is higher for peel and stick. Of course it is a bit more technical than that but this is the basic idea behind how felt works. On lower slopes i feel more comfortable with the thicker felt. As of publication you can purchase a 72 foot roll of 30 pound roofing felt for around 15.

Felt is commonly sold in either 15 or 30 rolls measuring 36 inches wide. A 66 foot roll of synthetic underlayment will set you back about 86. 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. The best weight for roofing felt is the 30 pound product because it provides thicker and.

The difference between 15 lb and 30 lb roofing felt paper. 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. Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof the type i recommend depends on roof slope. Felt paper is commonly produced with a certain number of recycled products and coated with asphalt.

15 pound and 30 pound refers to the thickness of the felt with the numbers indicating the weight of 100 square feet of this paper back when they were originally developed. Now however they weigh less although the names stuck. 15 pounds per hundred square feet and 30 pounds per hundred square feet. The 15 pound was for lighter weight projects while the 30 offered more heavy duty protection.

If 100 the typical upgrade cost to go from 15 to 30 is going to blow a sale for you you are doing something wrong. For many years roofers used asphalt saturated felt under roofing shingles and it was historically available in two standard weights. On steep roofs the 15 rips easily under foot. The choice of 15 or 30 pound felt paper is up to you.

Generally speaking roofing felt is a felt paper that is soaked in asphalt and other water resistant compounds to produce a membrane.