15 Lb Roofing Felt Vs 30 Lb

Its main purpose is to prevent moisture from leaking into a roof.

15 lb roofing felt vs 30 lb.

Generally speaking roofing felt is a felt paper that is soaked in asphalt and other water resistant compounds to produce a membrane. 15 lb felt paper weighed 15 pounds per 100 sq. One roofing square and 30 lb felt paper weighed 30 pounds per square. 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 difference between 15 lb and 30 lb roofing felt paper. Felt is commonly sold in either 15 or 30 rolls measuring 36 inches wide. Organic dry felt is made from 100 post consumer recycled material. Of course it is a bit more technical than that but this is the basic idea behind how felt works.

The main advantage of using felt roofing underlayment is cost. Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. The numbers ihad a correlation to the weight not the thickness. The biggest drawback to synthetic underlayment is the cost.

Felt roofing underlayment is typically available in two types. What is 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. 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. Roofing felt also called roofing felt paper is underlayed on roofs before shingles are added. As of publication you can purchase a 72 foot roll of 30 pound roofing felt for around 15. 30 felt is typically thicker stronger and may be less prone to tearing or ripping off during installation or weather events.

Historically roofing felt paper was named for weight. 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. The standard types of felt are 15 and the more waterproof 30. 15 tarah astm 4869 type i is an 15 tarah 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.