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Old 12-10-2008, 11:27 PM   #14
cx
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Join Date: Jul 2001
Location: Boerne, Texas
Posts: 86,432
Rich, you ain't got a prayer of a successful stone installation if those figures are accurate.

While between-joist subfloor deflection is the more critical issue in most tile installations over wood-framed floors, you gotta at least get in the right ballpark with your framing structure. Even with span charts for your particular wood specie (if we knew it and it was very good) we'll have trouble getting you up to specs for ceramic tile with the addition of your extra joists.

That'd pewt you at about half what you really need for natural stone.

Gotta think mid-span support here. Your situation allow for that?

My opinion; worth price charged.
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