OSB+T&G+wall construction

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  #1  
Old 06-24-14, 05:56 AM
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OSB+T&G+wall construction

I'm building a 12x32 workshop. Ground is covered with 6 mil plastic. Subfloor is 19/32" OSB, covered with roof felt for moisture barrier, then 23/32" T&G plywood. The T&G plywood will eventually get painted or covered in vinyl flooring. I've made it through all the foundation (piers and beams) work - and am just about ready for the perimeter and floor joists.

My question is: Should the walls be built on top of the OSB - with the T&G cut back to occupy just the "inside"? Some forums have suggested the T&G needs to float due to expansion/contraction.

Or do I just lay both the OSB and the T&G and build the walls on top of both?
 
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Old 06-24-14, 06:21 AM
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Something doesn't make sense you've installed the subfloor but not the floor joists
I'd erect the walls before installing a 2nd layer of plywood. IMO one layer of 3/4" plywood is plenty good enough for a shop floor.
 
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Old 06-24-14, 06:31 AM
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just making sure my ducks are in a row before I do any flooring over the joists.....

I'll finish up the perimeter (double all the way around) and floor joists, and solid blocking today/tomorrow.....then the flooring. Hence wondering if the walls should sit atop just the OSB or the OSB+ the plywood.

But it would be nice to figure out how to build the roof on the ground - and THEN set it on top with just two guys! LOL! Ten foot down seems much more perilous than it did 30 years ago....
 

Last edited by txtown; 06-24-14 at 06:57 AM.
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