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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)

Your source for building tips, woodworking & furniture plans, house plans and building advice directly from Dave...

Hi, I'm Dave Osborne. With over 50 years experience as a journeyman carpenter, foreman and contractor in heavy construction I enjoyed working with apprentices and sharing the tricks of the trade that others shared with me. Now I get emails from Members all over the world and we include many of my answers in our Free Monthly Newsletters. Some of my answers include drawings and instructions specific to a project, but may also answer your questions. I use correct construction terminology, so you can confidently inform your building supply dealers or contractors exactly what you need.

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