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J187 07-24-2006 08:47 AM

How scuffed should old tile be before tiling over w/ new
 
I am going to be tiling over old ceramic tile in my bathroom. I hit the old tiles with a 60grit on a belt sander. The gloss came off, but the tiles are not very rough. How much scuffing do I need to do for the modified thinset to bite properly?

Floorwizard 07-25-2006 12:38 AM

Hmm. As gritty as you can get I would imagine.
Did you test also to make sure there are no hollow spots?

J187 07-25-2006 07:30 AM

Yeah, I did test for hollow spots and level. These tiles are perfectly solid. Thanks.

R&D Tile 07-25-2006 08:01 PM

Use a good modified thinset and go for it.:thumbsup:


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