I've just moved into a 1929 home that has a concrete subfloor in the 2nd floor bathroom. There is a leak somewhere from the supply or drain piping in that bathroom, leaking onto the dining room ceiling below. In addition, I want to reroute some plumbing, as I'm putting in a clawfoot tub. Access to the pipes from the dining room ceiling is not feasible, since it's an artistic sculptured ceiling. I've started tearing up a portion of the concrete subfloor to get to the pipes, and am contemplating removing all of the concrete subfloor. In that case, I would rebuild a standard subfloor for ceramic tile (plywood subfloor, backer board, etc.). I know it's a huge job, but has anybody done this? Any recommendations or major concerns?
I haven't ever done this project but I think it seems pretty much like any other remodeling job. I would suggest taking your time tearing up the floor so you don't damage anything else along the way. It sounds like you know what you are doing so I say just take it slow. I also know you posted this some time ago so if you finished the project let us know how it went and how it turned out for you. Thanks