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Old 05-07-2008, 12:17 PM   #1
Gordy
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Question Grout or Silicone?

Hello,
I am using 12" travertine in a shower remodel. Would it be better to keep 1/4" spacing where the walls meet the floor and grout or butt the tile tight to the floor tile and use silicone or such. Which would seal better and or look better?
Thanks
GC
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Old 05-07-2008, 12:27 PM   #2
bbcamp
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Actually, none of the above. Leave a 1/8" or so gap, then caulk. The gap is necessary for movement. Butting the tiles together will simply allow them to grind until one or the other breaks.

Same applies for wall to wall joints.
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Old 05-07-2008, 12:29 PM   #3
Gordy
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Thanks

Thanks for the information,
GC
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Old 05-07-2008, 01:44 PM   #4
jp33
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What about normal grout spacing between 12" tiles, wall and floor? Can you go with 1/8" all around? I would like the grout lines as small as possible but don't want to place the tiles so close that I have problems.

Jeff
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Old 05-07-2008, 01:52 PM   #5
bbcamp
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If your walls and floors are flat, and your tiles are accurately calibrated (exactly the same size), you can have a 1/8" groutline on walls, floors and corners.
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Old 05-07-2008, 01:58 PM   #6
get'r Done
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Hmm, I thought it would be better to grout that lower part to allow any water, if got behind tile some how from above, to at least give the water a chance to leach out from the grout. If you use silicon the water could not penetrate thus stuck behind the tile. Mold, mildew??

Guidance?
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Old 05-07-2008, 02:12 PM   #7
bbcamp
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If you are doing a traditional mudbed/backerboard/liner shower, any water that gets behind the wall tile will flow down the backerboard (or moisture barrier) and directly into the mudbed, where it will eventually find the weepholes in the drain.

If you are doing a surface waterproof membrane shower (Kerdi, etc), then water doesn't get past the membrane. It can only go out the same way it got in, as a vapor through the grout.

In neither case is a weephole, crack or open joint necessary between the bottom row of tiles and the floor. However, since movement is possible at any change of plane, grout in that joint will crack, but caulk won't. That's why caulk is required there.
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Old 05-07-2008, 03:49 PM   #8
get'r Done
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Thanks for the clarification BBCAMP!!!!
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