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Unread 09-16-2008, 01:52 PM   #2
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Join Date: Nov 2003
Location: LaConner, Washington
Posts: 13,694
Whats the unsupported span of the joists? With that information, go to the Deflecto tool above (see blue bar above), input your joist data and tell us what you get.

The 1/2" ply for a sub-floor is a problem. So is the Jersey mud job they put under the Mexican tiles (that's the lath plus thin layer of mortar).

Hardie vs Durock, that's a Ford, Chevy thing. Nothing to be concerned about with that difference of opinion.

I like the contractor who said not to tile directly to plywood. Mud over plywood is fine, long as it's thick enough and your 1-3/4 total height limitation eliminates that opton. The mud layer alone must be in the neighborhood of 1" to 1-1/4".

Welcome to the Forum. How about a first name?

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