Nowadays low cost 15 felt can weight as little as 8 to 12 pounds per square 100 sq.
Paper under siding.
This underlayment is an important line of defense against moisture penetration.
I have seen literally hundreds of houses stripped of asbestos siding that had 15 felt under it.
Siding applied directly over tar paper creates a sandwich effect and can trap water between the siding material and the tar paper.
On walls it has been eclipsed in new construction by various brands of house wrap a woven or spun bonded plastic.
The standard weather barrier used traditionally under wood vinyl and other siding materials is 15 pound felt.
Tar paper does not offer this.
It is an age old choice as a weather barrier under roofing and siding.
Working with a helper install the bottom piece of felt so it extends 1 or 2 inches below the sill.
If you want vertical drainage with tar paper you have to add treated lumber strips on top of the tar paper.
For stucco the standard is two layers of grade d building 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.
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.
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How to get rid of wasps under siding written by shermaine williams on dec 30 2009.
Why do homes need house wrap.
Position the successive panels.
Its primary purpose is to prevent air and water leaks that may have seeped past the vinyl exterior.
The paper requirement is typically omitted for other types of siding when they re installed over rated structural sheathing.
Vinyl siding can be installed directly over wall sheathing wood siding or stucco.
I ve opened up houses built less than 5 years previous and the tyvek was shreaded like old newspaper.
How to do it install bottom piece.
They were built in the 1950s and 60s the felt was in perfect condition.
If you will be attaching.
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.
Drive plenty of staples especially if it is windy in your area.
This is a time intensive process and requires all sorts of skill.
Drive staples and trim.