7/16 Sheathing/trusses Spaced 24" - Roofing/Siding - DIY Home Improvement | DIYChatroom

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Old 09-02-2012, 11:57 PM   #16
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What your going to see from the attic is just a strip of aluminim about 1/2 wide between every row of OSB.
If you had one in your hand it just looks like the letter H and should say 7/16 right on it most of the time.

It also allows for the 1/8" gap needed between the panels to allow for expantion.


Last edited by joecaption; 09-03-2012 at 10:08 AM.
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Old 09-03-2012, 08:43 AM   #17
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I've worked on hundreds of houses with 7/16in OSB with 24in OC trusses. Most have H clips but once in a great while there is no H clips present. What will occure without H clips is the decking can buckle. The buckling is more common with plywood however and typicaly not that bad with OSB.

My primary home is a 7k sq ft home built in 03/04 with 7/16in OSB with trusses 24in OC with H clips. I sleep just fine at night!!!
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Old 09-03-2012, 09:54 AM   #18
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As others have said 7/16 2'OC rafters and H clips are common.
I have been in 5 provinces and all were this way.

*** As stated below please ignore this it is bad advice, left it here so the comment below would make sense.***
If there are no H clips you could use PL400 or the like and glue plywood scabs/backing on all the joints, Say 1/2" thick and 6" wide.
Although there does need to be a gap between the sheets.

Last edited by mae-ling; 09-04-2012 at 10:28 AM.
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Old 09-03-2012, 08:19 PM   #19
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No glue/plywood, they have to expand/contract at the edges. You may need them, OR NOT: http://www.strongtie.com/products/co.../pscl-psca.asp As said, read the rating ink stamp on the panel, then add 2x blocking- if needed.

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Old 09-04-2012, 10:29 AM   #20
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Maybe I should not post advice when worked 21 days and now on nights!


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