Rating System For Felt Roofing Paper

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.

Rating system for felt roofing paper.

Astm d226 d226m standard 09. Felt paper also referred to as tar paper was the standard underlayment material in roofing for decades. Asphalt saturated material for excellent waterproofing. Type i 15 or 15 lb.

Generally speaking roofing felt is a felt paper that is soaked in asphalt and other water resistant compounds to produce a membrane. Felt roof deck protection. Type ii 30 or 30 lb. Felt is commonly sold in either 15 or 30 rolls measuring 36 inches wide.

It was easy to use durable and even had alignment lines to help with the shingle installation. The typar is 10 times stronger and 10 times lighter than 30 felt. The best weight for roofing felt is the 30 pound product because it provides thicker and. Specification for asphalt saturated organic felt used in roofing and waterproofing.

The american society for testing materials astm standards that apply to felt paper are. Be sure to select the underlayment approved and compatible with the overlying roofing materials and therefore comply with building codes. Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment. Asphalt saturated heavy duty roofing felt is available in 15 and 30 pound weights.

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. Lighter than felt synthetic underlayment is just as easy to work with. When you compare the typar to traditional 30 felt roofing paper you can quickly see the advantages to using it. 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.

This felt will help prevent damage to your roof from wind driven rain and water from other sources. Synthetic underlayment started gaining popularity in the last decade. Therefore it s tear resistant and very easy to carry up onto the roof top. Item 656632 model 0903000.

Of course it is a bit more technical than that but this is the basic idea behind how felt works.