When I was replacing vanity in small bathroom, I discovered that old vanity was sitting on top of the wooden sub-floor while the rest of the floor (with ceramic tile) is about whole inch above the sub-floor. I'm planning to install tile (never did it before) and I've read that you attach cement backer board to sub-floor and use adhesive to attach tiles. However cement boards are sold in 1/2 thickness. What should I do to make whole sandwich (board, adhesive, tile) to be on the same level as rest of the tile floor? I'd much appreciate any suggestions! :)
you can use floor leveller. you can but it at home depot,$35, follow the instuctions as far as how much water to add. it mixes into a watery slurry that levels it self once poured. it hardens as hard as cement and then you can glue your tile to it.
Screw down a piece of 1/2 plywood to the subfloor and then screw down the cement board on top of that. If you are still a tad low you can always spread on a layer of thinset mortar to bring it up to the same height as the rest of the floor. Whenever I do a bathroom I always remove the vanity and tile under it just like the rest of the room. That way, everything is level and if you ever want to replace the vanity with a smaller one or a pedestal sink the floor is good to go. What I have found, and you have found too, is that most people are just too damned lazy to bother doing that.
