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Tar Paper

Question

Do you use tar paper for moisture barrier under vinyl siding, the same as felt paper? We have 15 and 30 pound, which one? Is Tyvek housewrap better?

Answer

The moisture barrier behind siding is a special breathable tar paper. It is listed in minutes of water penetration, such as 15, 30, 60, minutes. Roofing felt is a non-perforated tar paper which is listed by its weight, such as 15, 30, 50 pounds per 100 square feet (a square). Tyvek is a good product for walls, it also is breathable.

Dave

(Ask Dave) (About Dave)



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