Quick Answer: Should I Use 15 Or 30 Lb Felt?

What is the best quality roofing felt?

The Iko Super Shed Felt is the best shed roofing felt on the market.

This traditional style roofing felt looks great in any garden; waterproofing and protecting your shed roof from the elements while elongating its lifespan.

This felt is quick and easy to install..

When should I use 30lb felt?

felt for proper underlayment. 30lb. is used for many specialty applications such as: low pitch roofs, steep roofs (pitches over 7 on twelve), flat areas to be roofed with roll roofing, and new construction.

Is 30 lb felt a vapor barrier?

Asphalt-saturated Kraft paper found on fiberglass batt insulation is a common form of a Class II vapor retarder. Asphalt felt (often called 15# and 30# roofing felt), Grade D paper, and some types of house wraps are common forms of moisture barriers.

What does 30lb felt mean?

The difference between 15-lb and 30-lb roofing felt paper 15-lb felt paper weighed 15 pounds per 100 sq. ft. (one roofing square) and 30-lb felt paper weighed 30 pounds per square. Felt paper is commonly produced with a certain number of recycled products and coated with asphalt.

Is 15 pound felt waterproof?

Everything in Moderation. Roofing felt can get wet and still maintain its integrity, as long as it is not exposed to the elements for more than a few days. It will break down in sunlight and with large amounts of ongoing moisture. … If the felt is still wet, it may rip when shingles are installed.

Does roofing felt keep water out?

Roof felt gives your roof a better appearance and will help it last longer. The felt helps ensure water drains off the roof after a storm. It helps keep your roof free from moisture, which can lead to leaks, rot, and mold. The felt also serves as a protective membrane against ice or snow dams.