15 Vs 30 Lb Roof Felt

Item 656632 model 0903000.

15 vs 30 lb roof felt.

The main advantage of using felt roofing underlayment is cost. Felt roofing underlayment is typically available in two types. 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. As of publication you can purchase a 72 foot roll of 30 pound roofing felt for around 15.

15 lb felt paper weighed 15 pounds per 100 sq. A 66 foot roll of synthetic underlayment will set you back about 86. 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. Labor is higher for peel and stick.

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. Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof the type i recommend depends on roof slope. 15 came perforated for use as a ply sheet for built up roofing. Historically roofing felt paper was named for weight.

Felt paper is commonly produced with a certain number of recycled products and coated with asphalt. Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. No 15 felt and no. This 30 felt roof deck protection provides a layer of protection between your shingles and roof deck.

30 felt type construction helps provide an extra layer of protection between your shingles and your roof deck not included. Organic dry felt is made from 100 post consumer recycled material. The felt helps prevent wind driven rain from causing damage to your roof structure and home. 30 felt is typically thicker stronger and may be less prone to tearing or ripping off during installation or weather events.

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