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Unread 02-09-2006, 02:45 PM   #1
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prep for laying ceramic tile over ceramic tile

I'm planning to lay the same tiles over the existing tile in my shower to fix the drainage problem. It's a large shower 4'X5' (The installer I hired screwed it up. It's a long story). I have tiled over tile before and I roughened it with my grinder wheel.
I'm wondering if this is totally necessary as I would like to avoid this if possible.
Is there an easier way (and less dusty) . I was thinking about sanding it with a heavy grit sandpaper, but I don't think this will roughen it much. Maybe that would just take off some sealer. And what about using conctete adhesive as well.
I would really just like to slather it with thinset throw it together and call it good But I'm worried about good adhesion. Thank you for all replies, >james
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Unread 02-09-2006, 02:54 PM   #2
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Hi James,

If the moh of your tile is less than the moh of the sandpaper, it will work just fine. If not, the tile will win that battle.

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Unread 02-09-2006, 05:01 PM   #3
Dog paws
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I wouldn't bother with sanding it. Just clean it real good and use something like CustomFlex/MasterBlend or Kerabond/Keralastic. That will weld the two tiles together.
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Unread 02-09-2006, 05:35 PM   #4
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Do you have to build it up to fix drainage problem? I usually clean the tile really well and use laticrete 317 and 333. Kerabond/keralastic is very sticky also.
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Unread 02-10-2006, 10:19 AM   #5
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Hi James

I use the products that Eric uses. Make sure that you have all soap film removed. Use a high alkaline product, such as Stone Techs KlenzAll.

Are you just using a drop in drain cover? Did they prepitch the pan liner? Is everything waterproofed correctly at the curb and jamb?

You may have more issues to deal with, than just improper drainage.
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