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Posted by terry on September 20, 2008, 9:22 pm
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> > Converting 300 sq ft garage into family room. Installing full floor
> > above garage concrete slab. I want to put a polyethylene vapor barrier
> > on the concrete.
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> > Most places I read recommend 6 mil polyethylene. Home Depot selling
> > for $50.
>
> > When cleaning out the garage I found a brand new box of 4 mil
> > polyethylene that my Dad had given me.
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> > Would it be a problem if I used the 4 mil that I have, instead of
> > buying 6 mil?
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> > I have a giant box. Can I double-up the 4 mil, creating a 8 mil
> > barrier?
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> > Thanks,
>
> > Chris
>
> might be ok if all seams sealed and overlapped. but plastic isnt
> forever. how old is it?
>
> if your getting a permit run it by the local code enforcement building
> inspector- Hide quoted text -
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> - Show quoted text -
Prob Ok if never exposed to sunlight!
But 300sq ft. of 6 mil not very expensive? Assuming you have to
insulate and vapour barrier the walls (unless they are already
insulated and vapour barriered) use the 4 mil for that? Also what
about the ceiling insulation and vapour barrier for a room that will
now be heated, occupied by living breathing people and other
activities that put out moisture; is that insulated and vapour
barriered?
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