Attic Floor 7/16 vs 1/2 OSB


Old 08-03-04, 09:51 AM
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Attic Floor 7/16 vs 1/2 OSB

I want to make my detached garage attic into usable storage. It was started at some point by someone. Would 7/16th be enough thickness for this?? Or spring for the 1/2"?? The 7/16th is about $4 cheaper and i need at least 8 sheets. so it would be a good cost savings...
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Old 08-04-04, 03:55 PM
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Personally I would go with the 1/2" if you're going to use OSB, it really is noticably stiffer than the 7/16", but I would also say that if this were my house I'd be using plywood. Good luck.
Old 08-05-04, 04:20 AM
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I will at least use 1/2" then. I've heard that from a guy at work, just wanted another opinion. Is plywood that much better?? The reason for the OSB was that there are already a few sheets up there from when the garage was built 10 years ago. It seems to be in good shape. How would the plywood benefit me over the OSB?? I won't be keeping anything to crazy up there, but i want it to be sturdy. My joists are the length of the garage, 24', by 8" and 16" on center.
Thanks for your opinion...
Old 08-16-04, 05:55 AM
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There is one other thing to consider. Is the bottom cords of the trusses in question capable of handling any kind of extra load without creating a sag of any kind. I would use the 1/2" CDX also it is quite a bit better.
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