Hi there. We had a toilet catastrophe in our house and as a result I pulled up most of the wall-to-wall carpet (which smelled absolutely atrocious, by the way!), and have decided to put down ceramic tile.

Under the carpet is some kind of linoleum type tile (circa 1967). Under that is a concrete slab foundation.

Do I need to remove the existing tile before I put down ceramic tile, or can I lay it over what's there already?

Thanks!