subfloor thickness vs joist spacing


Old 05-02-12, 01:06 PM
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Question subfloor thickness vs joist spacing

If the the subfloor thickness is too thin based on joist spacing can you just screw down a 1/2 or 1/2 layer of ply or osb to make it up? I have 24' center to center joists and 3/4 OSB subfloor but manufacturer specifies 1 inch subfloor up to 19 inch joist spacing. Thanks again.
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Old 05-02-12, 03:16 PM
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Then you'll probably need a full 3/4" addition since you are on 24"oc. What are you planning as final flooring? Tile, hardwood, carpet, etc?
Old 05-03-12, 06:18 AM
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Also helps to know what size the joists are and what the unsupported span is.

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