Tiling over mosaic (1954) with electric radiant heat?
I am renovating my bathroom around the same time as my attic addition (separate projects). I currently have the typical black/white tile that looks like a hospital (yuck). A neighbor was instructed by my wife to sledge off all of the wall tile when I was away at school, but he never got to the floor.
I want to put down electric radiant since new tile is going in (12x12 ceramics). Do I have to bust up the original tile, or can I leave it? (Since the electric radiant has to be laid in a thin bed of mortar, I figured leaving the old tile wouldn't matter)
I'm no pro, so don't quote me...but I don't know that it would be a good idea to tile over what you have. Mostly because it's a smooth surface, so I don't think the mortor would hold to it. In my opinion, you're better off removing the tile so that you start with the proper substrate.