attic floor material


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Old 04-11-09, 07:31 PM
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attic floor material

I'm putting in attic stairs in my garage ceiling. Actually there is no ceiling and no attic yet just joists above. I'm going to store things up there. I went to the store to look for wood flooring but got lost in the options. What exactly do I want to put on the floor up there? 2x10 joists every 12", spanning about 20 feet.
 
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Old 04-11-09, 07:37 PM
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Just get some 5/8" OSB or plywood. They come in 4x8 sheets.
 
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Old 04-11-09, 08:11 PM
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OSB or plywood? What's the purpose of using one over the other? Tongue and groove or not, or doesn't it matter much for this installation?
 
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Old 04-11-09, 10:23 PM
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Ply is 1/2 as heavy as osb. Code on your joists is 2x10 - 12"o.c. - 17'-10". So your over-spanned for 50# per square foot load as a living space, but great for storage. I'd put a least one row of blocking across the middle, to make them act as one. Definetly get t/g , with construction adhesive glue. Be safe, GBR
 
 

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