Finished grouting the shower surround and started in on the rest of the bathroom. There were three layers of subfloor and glue down tile. The top layer was glued and screwed to the middle layer but luckily the middle layer was only nailed to the original subfloor. I used a skill saw with the blade depth set to cut just the top two layers. Once i got down to the original i found two places of water damage, the typical spots around the toilet flange and side of the tub. Ripped those out and that's as far as i got. I had to pull subdloor because the floor was level with the hall and adding ceramic tile would raise the finished floor height a good half inch at the hall to bathroom transition.