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Old 12-30-2008, 06:10 PM   #1
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Nailing osb to joists?


I just finished cutting about a 3x5 section of my osb subfloor out and getting ready to patch it back. Had to do some plumbing and replace a water damaged section. Anyways, the one joist I have a good 3/4" to lay my osb on and the other is about a half and some spots a little less. My concern is if I need to cut a little more away to expose more of the joist to be more secure to the joist or is that enough of a nailer to go ahead and lay it on and nail it. I am anal and obsessive, just wanted to see if I was being a worry wart or to go ahead and cut a little more back before nailing it. Thx. Mike
Also: When I do my blocking for the seams I have no problems except where there is some ductwork and I can't put a piece of blocking in there. Is it sufficient enough to lay my 2x8 horizontal/flat. It's the only way anything will go in there for a nailer/block to support the cut edge of the osb. Thx.

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Old 12-30-2008, 06:51 PM   #2
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Nailing osb to joists?


Mike no problem where it's a little short stitch a 2 by 1 on the side of the joist and that will give you plenty to fasten to. On the blockers instead of nailing them screw them both sides it will stop them bouncing all over the place.Hope this helps. billy

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Old 12-30-2008, 07:05 PM   #3
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Nailing osb to joists?


Yeah that helps alot. What about where I need to block where the duct work is? Any problem with laying the block flat just for that one spot? Thx, Mike.
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Old 12-30-2008, 09:58 PM   #4
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Nailing osb to joists?


You can add blocking to better support the seams as you see fit. Personally, I use 2x4's when they'll fit. Don't forget to use subfloor adhesive to keep the new OSB from squeaking.
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