self leveling mortar over cement board?
About 3 years ago I got in way over my head and did a demo/remodel of my master Bathroom, part of my second bath and the closet in my master bedroom. In addition to being in way over my head, I ran out of $$ and it has been sitting idle for a long time. Anyway, I finally am trying to get this rolling again and have a question about the floor. Part of the new master bath floor runs next to old second bath floor and even with the subfloor in, it is still not level with the existing tile floor next to it next to it. I want to tile over everything so what I was thinking of doing was putting down some concrete board on the subfloor to get it close to the height of the tile next to it and then poor a self leveler over the whole thing. Is this OK? Do I need to worry about expansion joints etc. Anything else I need to do? Will this even work? Start jonging in 3.2.1...