Natural stone mosaic

Name: Jeffinfairfax
Posted: Sat, Apr 17, 2010 at 5:55 pm MST
I want to use a 1" hex marble on my bathroom floor. I've been told the floor is good enough for ceramic, but not stone. Joists are 16 foot 2x12s with 3/4" plywood subfloor. I plan to use Ditra as an underlayment. Is it true that stone is a problem, even with a mosaic? I could see where deflection would be a problem with a larger tile.
Name: Josh
Posted: Sat, Apr 17, 2010 at 6:27 pm MST
Reply: 1
If your using ditra, schluter wants you to add a layer of min. 3/8 ply over the 3/4 for stone. That being said, minimum recommended tile size over ditra is 2"x2".
Name: Jeffinfairfax
Posted: Sat, Apr 17, 2010 at 8:12 pm MST
Reply: 2
Thanks! Adding an extra layer of plywood will be easy and I can get 2" hex instead of 1"

Appreciate the help.
Name: Jerm
Posted: Sun, Apr 18, 2010 at 2:34 pm MST
Reply: 3
Also think bout your cuts along walls and such those pieces are not always gonna be at least two inches, Are you dead set on using mosaic on the floor, I think if you want ditra you need to use a bigger tile!
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