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What is the difference between 15 pound and 30 pound felt paer for roofing?
Wiki User
∙ 16y ago
the best reason i can think of is the 30lb felt is denser and when applied over and uneven, older pine roof boards or plywood the density would be able to cover blemishes in the sub roof. Splinters from old nail removal, or other slight imperfections. Ice guard as used in freeze areas is also more durable to puncture...The need to lay the 30lb felt with little or no wrinkles also makes for smooth runoff. the use of correct material is important when the pitch of the roof is reduced hope this helps. jerome
Wiki User
∙ 15y ago
Wiki User
∙ 14y ago30-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 feet per roll of 30-pound versus 432 square feet for 15-pound, so it costs twice as much to use. My rule of thumb: if you're using three-tab shingles, 15-pound is fine. If you're using architectural shingles, they'll lay better if you put 30-pound felt under them.
Wiki User
∙ 16y agoThe thickness of the paper. 30 lb. is twice as thick.
Wiki User
∙ 15y ago30 pound is in the same size roll, but covers half as much as 15# and is twice as thick.
Wiki User
∙ 13y ago30 will last twice as long as 15 BUT it is harder to install on the flashing so your better off using 4 PLY 15 with hot applied bitumen
Wiki User
∙ 14y ago15 lb refers to the thickness of the paper. Felt is also available in 30 lb .
Wiki User
∙ 14y agoOne is twice as thick. On steeper slope roofs, 30 lb. has less chance of tearing when you walk on it. Less chance of having holes poked in it also before the shingles go on.
Wiki User
∙ 14y ago30 lb is thicker. That's all.
Wiki User
∙ 12y ago.016 "
Anonymous
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What is the difference type 1 and type 2 roofing felt?
type I is 15# felt and type II is 30# felt
What are the benefits of roofing felt?
The benefit of roofing felt is to provide a simple barrier between the asphalt shingles and the wood sheathing below it. The sap in the wood is not good for the shingles.
Why are 1 Pound and 2 Pound coins thicker?
If you mean, "why are they thicker than other coins?" it is so that the difference between coins of similar size can be seen and felt.
What is felt roofing?
Thick asphalt-impregnated paper used for roofing.
What is the difference between 30 pound felt paper and 60 minute building paper?
60 minute building paper is used to build..
What adhesive should be used to make a roofing felt patch?
Black Knight roofing tar .
How much felt paper do you need for 30 square roof?
Here's what I can help you with: 3 roofing squares means 300 square feet (1 square = 100 feet). On a regular basis, one square is covered by 3 bundles of shingles. Roofing felt (1F) is usually supplied in rolls (30 ' of length), with one side covered with sand or synthetic granules. Be aware that there are two kind of felt impregnations: bituminous and tar - there is a distinction between these two. If I were you, I would surely look (and go) for the newest waterproofing membranes, lot more less prone to puncture and tear. I hope this helped. Succes!
When re- roofing is it best to use ply and felt or just felt?
15 lb felt is all you need.
What is the purpose of roofing felt?
It protects the roof sheathing from moisture.
How much do you lap roofing felt on 4 on 12 pitch?
When you say roofing felt (or blackout paper) It usually means the felt paper used under asphalt shingles. If that's the case, a couple of inches is fine. If you're really talking roll roofing, then that's a whole different ball game.
What size nails are used for roofing felt paper?
You can use roofing nails, but most people use a stapler, it's cheaper and faster. The felt paper is just a base for the shingles/tiles.
Can chicken coops have roofing felt?
no, because it attracts red mites
