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Uh-oh- How do i improve my deflection rating for a slate floor??

13 years ago

Hey All,

I have a new construction project going on and was hoping to put 12" Slate tile into a 9 x 13' kitchen over 1/4 hardibacker. Subflooring is 3/4" plywood sitting on 2 x 10's spaced 16" O.C. over a 15' span. Joists are crossed braced in the center.

I used the recommended deflectolator and came up with an L318 deflection rating.

What would i need to do to make sure this is done right?

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