15 Lb Roofing Felt Vs 30lb Felt

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

15 lb roofing felt vs 30lb felt. The main advantage of using felt roofing underlayment is cost. Felt is commonly sold in either 15 or 30 rolls measuring 36 inches wide. Roofing underlayment 15 lb felt. Historically roofing felt paper was named for weight.

Labor is higher for peel and stick. Now however they weigh less although the names stuck. Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. The best weight for roofing felt is the 30 pound product because it provides thicker and.

Of course it is a bit more technical than that but this is the basic idea behind how felt works. 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. Roofing felt is similar to fleece made from polyester or fiberglass and then soaked in waterproofing agent. 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.

No 15 felt and no. 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. Felt roofing underlayment is typically available in two types.

15 came perforated for use as a ply sheet for built up roofing. 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. The difference between 15 lb and 30 lb roofing felt paper. A 66 foot roll of synthetic underlayment will set you back about 86.

This 15 felt roof deck protection features quality asphalt saturation for great waterproofing to add an extra layer of protection between your shingles and your roof deck. Generally speaking roofing felt is a felt paper that is soaked in asphalt and other water resistant compounds to produce a membrane. 30 felt is typically thicker stronger and may be less prone to tearing or ripping off during installation or weather events. 15 lb felt paper weighed 15 pounds per 100 sq.