Underlayment for Ceramic Tile Floor

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Old 07-20-09, 02:45 PM
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Underlayment for Ceramic Tile Floor

I'm tiling an 8' x 10' utility room (laundry and pantry) using 12"x12" ceramic tile. Currently the room has a 3/4" plywood sub floor installed. What underlayment should I use between the plywood and the tile? I would like the finished tile to end up pretty close to the height of the adjacent room's floor, which is 3/4" solid wood on top of the same 3/4" plywood. I guess my choices are durock, hardibacker, ditra, or some combination of them. Also what is the preferred method for fastening the underlayment - screws or some adhesive.
 
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Old 07-20-09, 03:10 PM
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Hi!

You could use 1/2" (7/16" actual), then your tile and come close to being flush. You would install it according to it's instructions, which state the board needs to be laid in a fresh bed of thinset and screwed (Screws are usually where the board is).

There is also Ditra XL, which is 5/16", costs a bit more, but less labor.
 
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Old 07-20-09, 05:51 PM
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You will likely get pretty close with 1/4" cement board. It gets bedded in thinset with a 1/4" notch trowel and screwed to the subfloor. That plus the thinset and tile should get you pretty close, depending on what kinda tile you are using.
 
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Old 07-24-09, 08:04 PM
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Which one is better? Durock or Hardibacker?
 
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Old 07-25-09, 04:38 AM
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It may be just a personal preference, but I like hardibacker. Squarer edges, screw insertion indicators. Better?? Debatable.
 
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Old 07-26-09, 05:46 AM
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They will all do the job just fine.
 
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Old 07-27-09, 11:01 AM
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so he has to use thin set between the plywood subfloor and the backer board before setting the tile?
 
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Old 07-27-09, 03:51 PM
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yep, thats required by all cement board manufacturers. Read their instructions.
 
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