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Subfloor on Concrete Augustine 05-19-2006
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Posted by Augustine on May 19, 2006, 11:36 pm
What would be the thinnest subfloor nailed directly on concrete? Is it
possible to not use studs under it?

TIA


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Posted by Edwin Pawlowski on May 19, 2006, 11:43 pm

> What would be the thinnest subfloor nailed directly on concrete? Is it
> possible to not use studs under it?
>

Above or below grade? In general, wood is not recommended on concrete
unless there is a vapor barrier, insulation, then the wood. You can use
engineered wood floors with just a special vapor barrier.
www.mannington.com



Posted by Augustine on May 19, 2006, 11:55 pm
It's above grade and I thought of a poly sheet as a vapor barrier
(Vapor Lock).

I'm trying to minimize increasing the height too much, and I was
thinking about 1/4" or 3/8" thick. Are such thicknesses feasible?

TIA


Posted by Edwin Pawlowski on May 20, 2006, 1:03 am

> It's above grade and I thought of a poly sheet as a vapor barrier
> (Vapor Lock).
>
> I'm trying to minimize increasing the height too much, and I was
> thinking about 1/4" or 3/8" thick. Are such thicknesses feasible?

What are you putting on top of the subfloor? 3/8" is not much to nail into
for a real hardwood floor. For floating floors, then yes.



Posted by Augustine on May 20, 2006, 1:42 am
I'm stapling 5/16" hardwood floor using 1" staples. I just measured
how deep the staple goes at 45=B0 and it requires a subfloor 1/2" thick.

My motivations is that after stapling the hardwood strips upstairs on
wood underlayment, I'm concerned that gluing them on concrete is going
to be not only more laborious as would increase the waste.

I've found several strips which were a little bent up or sideways and
I'm afraid that the glue would allow for such strips, unlike when
stapling.

Thoughts?

TIA


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