Rating System For Felt Roofing Paper

The american society for testing materials astm standards that apply to felt paper are.

Rating system for felt roofing paper.

Heavy duty felt design lays flat and minimizes wrinkling. Of course it is a bit more technical than that but this is the basic idea behind how felt works. Type ii 30 or 30 lb. Lighter than felt synthetic underlayment is just as easy to work with.

Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights. Synthetic underlayment started gaining popularity in the last decade. Asphalt saturated material for excellent waterproofing. Type i 15 or 15 lb.

When you compare the typar to traditional 30 felt roofing paper you can quickly see the advantages to using it. What is roofing felt. Felt roof deck protection. Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment.

It was easy to use durable and even had alignment lines to help with the shingle installation. Astm d226 d226m standard 09. Roofing felt may be necessary for use with your shingles to meet a class a fire rating when shingles are evaluated for their fire ratings it is done on a small test deck with the roofing felt underlayment in place without this underlayment the shingles alone may not meet the class a fire requirements. Felt is commonly sold in either 15 or 30 rolls measuring 36 inches wide.

This felt will help prevent damage to your roof from wind driven rain and water from other sources. Therefore it s tear resistant and very easy to carry up onto the roof top. Specification for asphalt saturated organic felt used in roofing and waterproofing. 15 felt type construction helps provide an extra layer of protection between your shingles and your roof deck not included heavy duty design lays flat to help minimize wrinkling asphalt saturation to help improve waterproofing ability to help prevent wind driven rain and water from other sources from infiltrating under your shingles and.

Generally speaking roofing felt is a felt paper that is soaked in asphalt and other water resistant compounds to produce a membrane. The typar is 10 times stronger and 10 times lighter than 30 felt. Be sure to select the underlayment approved and compatible with the overlying roofing materials and therefore comply with building codes. Add an extra layer of protection between your shingles and roof deck with this 30 216 sq.

When a roof system is evaluated for a fire rating the choice of roof underlayment is an important component for the entire roof system achieving a particular target rating.