what type of vapor bariier or barrier to use between studded wall and concrte patio,also if tar paper is suggested how many layers do i use? i do not want to have a chance of misture possibly getting to the studs, thanks for any replies ( the concrete patio have never had sealer applied to it in 30 years)
If you are talking about a concrete slab patio as the subfloor surface and you are building a stid wall on top of it then: Use pressure treated material as the base plate for your wall framing. That will be enough. If you wanted to you could add a foam sill seal but it's not needed. Once the wall is finished and exterior siding is applied then the siding will go down past the sill. This means that any moisture will be whatever can wick up through the concrete. A PT sill will be able to handle that small amount.
plan is pt for bottom, i thought some sort of barrier is needed between bottom stud and concrete to protect it more from the possibility of moisture wicking thanks for the reply
Just get a roll of foam sill seal and put it between the concrete and bottom plate.
Most preferred and used ones vapor barriers are made up of 40 to 60 mil high-density polyethylene (HDPE), and fluid applied (cured-in-place) membranes. Some people do use plastic vapor barriers which is not recommended. Use fiberglass insulation to avoid any water or moisture issue.
I believe you misread your Google search results.
Crawl space vapor barriers are 4 mil or 6 mil thick. In this case, the Op is concerned with what type of separation is needed between the bottom sill of the wall framing and the top of the slab.
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