The irc 2000 code and our building dept.
Tar paper behind vinyl siding.
If you want vertical drainage with tar paper you have to add treated lumber strips on top of the tar paper.
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Its primary purpose is to prevent air and water leaks that may have seeped past the vinyl exterior.
Siding applied directly over tar paper creates a sandwich effect and can trap water between the siding material and the tar paper.
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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.
Faq s acronym s terminology to tyvek or not to tyvek that is the question.
I want to replace the tar paper but i can t find it at homedepot or lowes.
Should any water get past the siding.
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.
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.
Tar paper does not offer this.
Installing foam board insulation under vinyl siding today.