Roofing Felt Paper Behind Siding

Asphalt felt tar paper the standard requirement is type 1 felt meeting astm d 226 standards.

Roofing felt paper behind siding.

Many builders use standard 15 pound roofing felt. If you want vertical drainage with tar paper you have to add treated lumber strips on top of the tar paper. The homeowners immediately noticed a petroleum odor when for six years there was never a problem. Felt paper also commonly referred to as tar paper is an underlayment material applied to bare walls before siding is installed.

Felt or building paper must be applied to walls properly to be effective. Nowadays low cost 15 felt can weight as little as 8 to 12 pounds per square 100 sq. The standard weather barrier used traditionally under wood vinyl and other siding materials is 15 pound felt. I need to do some repairs under my siding from a window leak.

Install pieces in the correct order and make cuts carefully so any moisture can travel downward at all points without slipping under the wrap. Fiber cement siding covered the felt paper. Felt labeled astm 15 meets specific standards and is the norm in many areas. Basically all model codes agree on the need for a weather resistant barrier paper usually specified as 15 felt or grade d kraft paper behind stucco brick stone and other porous veneers.

For example an ice dam or roof leak may allow liquid water to get behind the felt or housewrap. This is a good thing. Should any water get past the siding properly installed felt paper. The siding contractor then covered the felt paper with certawrap a modern air barrier.

Tar paper does not offer this. The paper requirement is typically omitted for other types of siding when they re installed over rated structural sheathing. The siding was improperly installed and was removed in early november of 2018. Item 656632 model 0903000.

Our house was built about seven years ago. A paul fisette director of building materials and. Siding applied directly over tar paper creates a sandwich effect and can trap water between the siding material and the tar paper. For stucco the standard is two layers of grade d building paper.

The short answer is that felt paper is fine as a weather resistant barrier behind vinyl siding and will not cause a problem if the siding is installed correctly. Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment.