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Unread 10-04-2006, 12:43 PM   #1
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Join Date: Oct 2006
Location: Brooklyn NY
Posts: 1
Floor Prep for Ceramic Tile

I wish to install ceramic tile in a kitchen that has a 3/4" thick tong and grove wood floor. The floor and joists are basically in good condition, except for two details.

1. When I removed a parquet floor covering, I discovered a strange situation. It seems that plumbers, rater than core through a joist, ran a pipe up, over and down the joist, thus creating a 3" by 3" void on the floor to clear the pipe. There is now the question of whether I may "bridge" this void with 1/4" cement board or do I have to install 1/2" or 3/4" plywood and 1/4" cement board over the 3/4" tong and grove floor as a base for a tile floor covering. I like to accomplish the job with as low a step as possible between rooms.

2. The floor is not level. In order to help level the floor I will need to "feather in" some additional thin-set to fill the low points in the floor (about 1/2" to 1" maximum thickness). May I add this extra material below the cement board or is it best on top of the cement board? I do not want a "mud job" because I wish to have as low a step as possible between rooms.
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