Felt Paper Under Cedar Siding

This underlayment is an important line of defense against moisture penetration.

Felt paper under cedar siding.

Nowadays low cost 15 felt can weight as little as 8 to 12 pounds per square 100 sq. On a sidewall installation with cedar shingles sawn not split like shakes over solid sheathing interwoven felt is unnecessary as long as joints are offset at least one inch laterally. For stucco the standard is two layers of grade d building paper. The standard weather barrier used traditionally under wood vinyl and other siding materials is 15 pound felt.

A continuous felt not plastic wrb is all that s required. 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. They were built in the 1950s and 60s the felt was in perfect condition. On walls it has been eclipsed in new construction by various brands of house wrap a woven or spun bonded plastic.

Consequently a high quality house wrap like barricade building wrap saves money and time over asphalt felt paper by reducing the need for repairs during the construction process. I have seen literally hundreds of houses stripped of asbestos siding that had 15 felt under it. Tar paper also known as building felt is tar impregnated paper. First off let s have a look at the drawbacks of cedar roofing since there are so few.

Above was my post to demon now there are people here who say you can t use tyvek under cedar because of the tanins in the cedar will eat away at the tyvek. I ve opened up houses built less than 5 years previous and the tyvek was shreaded like old newspaper. Felt paper also commonly referred to as tar paper is an underlayment material applied to bare walls before siding is installed. Cedar shakes tend to be on the expensive side compared to asphalt shingles or concrete tile.

I ll stick with tried and true felt paper. Cedar shakes a stylish and sophisticated roofing material. Should any water get past the siding properly installed felt paper.