Roofing Felt Paper Behind Siding

In fact many builders disagree on the effectiveness of house wraps altogether and while some builders will only install 15 pound asphalt saturated felt paper underneath exterior siding others swear by plastic fabric house wraps such as typar or tyvek.

Roofing felt paper behind siding.

I ll stick with tried and true felt paper. Should any water get past the siding properly installed felt paper. For stucco the standard is two layers of grade d building paper. Our house was built about seven years ago.

The siding contractor then covered the felt paper with certawrap a modern air barrier. I ve opened up houses built less than 5 years previous and the tyvek was shreaded like old newspaper. They also promote quick drying allowing air to get behind any siding. But because the vinyl siding covers the felt paper it is shielded from the sun and never gets hotter than the temperature of the siding from solar gain.

Fiber cement siding covered the felt 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. This is a good thing. The paper requirement is typically omitted for other types of siding when they re installed over rated structural sheathing.

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. Many builders use standard 15 pound roofing felt. Siding applied directly over tar paper creates a sandwich effect and can trap water between the siding material and the tar paper. For example an ice dam or roof leak may allow liquid water to get behind the felt or housewrap.

I need to do some repairs under my siding from a window leak. Asphalt felt tar paper the standard requirement is type 1 felt meeting astm d 226 standards. Install pieces in the correct order and make cuts carefully so any moisture can travel downward at all points without slipping under the wrap. They were built in the 1950s and 60s the felt was in perfect condition.

The standard weather barrier used traditionally under wood vinyl and other siding materials is 15 pound felt. Felt or building paper must be applied to walls properly to be effective. Felt labeled astm 15 meets specific standards and is the norm in many areas. Tar paper does not offer this.

The homeowners immediately noticed a petroleum odor when for six years there was never a problem. I have seen literally hundreds of houses stripped of asbestos siding that had 15 felt under it. The siding was improperly installed and was removed in early november of 2018. Felt paper also commonly referred to as tar paper is an underlayment material applied to bare walls before siding is installed.