Paper Under Siding

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.

Paper under siding. Moisture will find its way into these wall systems by way of cracked mortar joints gaps or cracks in the surface of the material. Why do homes need house wrap. I have seen literally hundreds of houses stripped of asbestos siding that had 15 felt under it. To sum it up house wrap is a lightweight paper like material that is most often used to completely cover the house directly on top of the sheathing and behind the vinyl siding.

Vinyl siding can be installed directly over wall sheathing wood siding or stucco. This is a good thing. Use tyvek over building felt under siding. It s important that use the building paper that is recommended for your area.

By doing so however you miss out on the opportunity to add add energy savings to the project. Should any water get past the siding properly installed felt paper. When building exterior walls with stone stucco brick when building exterior walls with stone stucco brick cedar eifs or fiber cement siding it is important to use an effective rain screen system that will provide a means for drainage and ventilation. Its primary purpose is to prevent air and water leaks that may have seeped past the vinyl exterior.

I ll stick with tried and true felt paper. 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. Building paper also called house wrap is a strong fibrous paper that blocks water and moisture from entering from the outside but allows moist air to pass through from the inside preventing a buildup of moisture inside walls that can lead to mold. These channels help direct water quickly down and away from the exterior siding material.

They also promote quick drying allowing air to get behind any siding. I saw a new house with felt paper under the siding rather than tyvek. They were built in the 1950s and 60s the felt was in perfect condition. Faq s acronym s terminology to tyvek or not to tyvek that is the question.

I ve opened up houses built less than 5 years previous and the tyvek was shreaded like old newspaper. Siding applied directly over tar paper creates a sandwich effect and can trap water between the siding material and the tar paper. I want to replace the tar paper but i can t find it at homedepot or lowes.