Subflooring question

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Old 01-26-19, 06:22 PM
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Subflooring question

I have 3/8 plywood down on my kitchen floors. I want to put 1/2 inch plywood over that to meet the cabinets so I can lay tile. My question is, is that ok or would you suggest something else?
 
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Old 01-26-19, 06:50 PM
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3/8 plywood and 1/2" plywood might as well have a zero strength rating as far as tile is concerned. Neither have enough strength to resist deflection and 0+0 still = 0.

So IMO you need to put down a minimum of 3/4 followed by 1/4 cement board. But your joist span also comes into play. The tile guys will want to know size of joists, spacing and span.

And truthfully, if your 3/8" is nailed and not glued, now is the time to remove it and start over with a subfloor that is glued and screwed... 3/4 tongue and groove plus 1/2" cement board.
 
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Old 01-26-19, 07:04 PM
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Thanks man. I appreciate it.
 
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Old 01-27-19, 06:25 AM
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that's a lot of work for tile... I'd look at alternatives, but then again, 3/8 is too thin for a subfloor
 
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