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MDF vs. OSB for Subfloor

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MDF vs. OSB for Subfloor Mark 08-22-2006
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Posted by Mark on August 22, 2006, 10:03 pm
Greetings Group,

My buddy is rehabing an old farm house and is having some flooring replaced.
He's got a quote on the work where he has the option of either MDF or OSB
for the subflooring and was wondering which would be better. I did a little
Googling and see both mentioned as used for this, but I personally thought
the OSB would be more appropriate. I'd generally heard of MDF as for
cabinets and such, and didn't think if it as having the kind of strength
needed for a load-bearing application like a floor.

Thought I'd run the issue past the group to see if there was any experience
(good or bad) with either.

Thanks!

Mark



Posted by Mook Johnson on August 23, 2006, 7:44 am
mdf will swell when wet.

better grades of OSB wont.


> Greetings Group,
>
> My buddy is rehabing an old farm house and is having some flooring
> replaced. He's got a quote on the work where he has the option of either
> MDF or OSB for the subflooring and was wondering which would be better. I
> did a little Googling and see both mentioned as used for this, but I
> personally thought the OSB would be more appropriate. I'd generally heard
> of MDF as for cabinets and such, and didn't think if it as having the kind
> of strength needed for a load-bearing application like a floor.
>
> Thought I'd run the issue past the group to see if there was any
> experience (good or bad) with either.
>
> Thanks!
>
> Mark
>
>



Posted by Eric in North TX on August 23, 2006, 11:46 am

Mdf is what you use if you are leaving and don't care if a leak happens
and the entire house melts and runs down the gutter.


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