Roof Felt Paper 15 Vs 30

30 is still asphalt saturated felt and is still safe underfoot and performs much better as a temporary roof as shingles are being applied.

Roof felt paper 15 vs 30. Item 656632 model 0903000. 9 out of 10 found this answer helpful. Generally speaking roofing felt is a felt paper that is soaked in asphalt and other water resistant compounds to produce a membrane. The type i recommend depends on roof slope.

No 15 felt and no. Because it s thicker and stronger. It is still used as a cheap underlayment but shrinks and wrinkles if it get overnight dew on it or goes through rain. It provides more of a barrier to water that may seep between shingles or tiles.

Roofing felt comes in large rolls and installs in horizontal rows starting at the lower edge of the roof with each subsequent row overlapping the previous one. 15 is easy to rip underfoot when installing the new roof system and ripped felt paper is useless regardless of weight. Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment. 15 roofing paper was the original underlayment for everything.

We use the 30 felt paper because i feel it is the best product for your roof. Fyi 30 roofing paper is too thick to use as an underlayment and is no better. It is thicker and heavier than the alternative 15 so if water ever gets under your shingles it has to work extra hard to get through the felt. The best weight for roofing felt is the 30 pound product because it provides thicker and stronger footing for roofers that does not tear out especially on steep roofs where footing is critical.

Felt roofing underlayment is typically available in two types. What is roofing felt. For slopes less than 4 12 i recommend 2 layers of 15. 30 felt is typically thicker stronger and may be less prone to tearing or ripping off during installation or weather events.

The main advantage of using felt roofing underlayment is cost. It lays down on the roof sheathing more easily than 15 pound and often has fewer wrinkles. Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof. Felt is commonly sold in either 15 or 30 rolls measuring 36 inches wide.

30 pounds per 100 square feet. Roofing felt in a 30 pound weight is heavier. There are better products but hd does not stock them in every store because everyone uses this 15 roofing tar paper. Of course it is a bit more technical than that but this is the basic idea behind how felt works.

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.