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Old 12-08-2009, 10:53 PM   #1
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T&G OSB interlocking question


I'm laying down 3/4" T&G OSB on top of platon membrane and finding that some of my grooves are crushed, making it hard to get the T&G joints perfectly sealed.

Should I accept it and fill the crack later or take the more drastic measure of knocking off half of the groove with my circular saw and laying the boards on top of the tongue to get a better joint?
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Old 12-09-2009, 06:37 AM   #2
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T&G OSB interlocking question


If it's really bad you should send it back to the lumber yard. There always seems to be a few dings and a sharp stanley knife can usually clean them up enough to make the joints go together or a large flat screwdriver works to straighten them out too. They are supposed to be gapped slightly for expansion. Have you been used a 2x4 to tap the sheets into place so you don't ding up the edges? The sheets should interlock nicely.
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Old 12-09-2009, 10:18 AM   #3
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T&G OSB interlocking question


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If it's really bad you should send it back to the lumber yard. There always seems to be a few dings and a sharp stanley knife can usually clean them up enough to make the joints go together or a large flat screwdriver works to straighten them out too. They are supposed to be gapped slightly for expansion. Have you been used a 2x4 to tap the sheets into place so you don't ding up the edges? The sheets should interlock nicely.
I may have done some of the crushing myself moving the 32 sheets into the basement. I was using a block of wood that was smaller than a 2x4 to seat them but I think the crushing was when I pulled them off the stack wrong (along). I'm going to give that try today. I only put a sheet or two in last night before I gave up so I'll give the knife/screw driver a try when I go back down there this afternoon.

When you say gapped slightly are we talking about a few 32nds of an inch?
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Old 12-09-2009, 11:32 AM   #4
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T&G OSB interlocking question


The gap is supposed to be there. You can overdrive them. The manufacturer wants the gaps for expansion and contraction. There is about 1/16 or more left after they are tapped together. It should say it on the sheet how they are to be installed.
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Old 12-09-2009, 11:35 AM   #5
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T&G OSB interlocking question


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It should say it on the sheet how they are to be installed.
Oh i'm going to feel like an idiot when I go down there and read that. Thanks!
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