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Old 07-20-2008, 12:20 AM   #1
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Question on preparing surface for Ceramic Tile


I'm preparing a plywood floor for ceramic tile. The floor was previously covered with tile, but I've removed the tile & backerboard . I am in the process of scraping the previous thinset up. It's not coming off very easily or cleanly. How clean does the plywood surface have to be before I lay another layer of thinset & new backerboard on it?

I'm preparing a plywood floor for ceramic tile. The floor was previously covered with tile, but I've removed the tile & backerboard . I am in the process of scraping the previous thinset up. It's not coming off very easily or cleanly. How clean does the plywood surface have to be before I lay another layer of thinset & new backerboard on it?

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Last edited by AtlanticWBConst.; 07-20-2008 at 07:33 AM. Reason: Discussions Merged: Same topic
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Old 07-20-2008, 01:58 AM   #2
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Question on preparing surface for Ceramic Tile


Needs to be fairly clean but more importantly very even for the new thinset to adhere to the plywood.
You can always apply more thinset before the backer board and make the plywood more level that way.
You can also sand off the thinset

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Old 07-20-2008, 07:16 AM   #3
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Question on preparing surface for Ceramic Tile


First, the subfloor should be free of any loose material. If it is not level use a leveling agent. Spread the leveling agent over the floor surface to smooth out any irregularities in the floor.

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Old 07-20-2008, 01:08 PM   #4
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Question on preparing surface for Ceramic Tile


Step out of the dark ages and into the light = Light work as well.
Remove the old thinset.
Check you floor for deflection. if you are with perimeters use Ditra.

Save your back and your time, the days of Backerboards are limited.

Level the floor first as MJ says but use Ditra this time.The floor will never fail.

View Ditra specs here:

Last edited by Ron The Plumber; 07-20-2008 at 01:44 PM. Reason: Advertising not allowed with out prior consent from Admin on this site.
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