In our bathroom and kitchen, the tiles are laid right on top of the stones in the concrete. If I knock down just the tiles, what's left is a concrete surface with holes and open areas. If I remove the concrete as well, you can see the brickwork directly. I wouldn't want to tile it over because I want to redo everything once.
Do I have to knock down all of the tile along with the concrete? (it's faster) or just the tile and make sure I don't smudge the concrete?