I am currently installing a shower and along with it I am going to tile the bathroom, entry foyer, and kitchen floors alike; they do all run together. The bath and foyer are now standard 3/4" hardwood floor and the kitchen is sheet lanolium. My question is can I go over the top of all of it or do I have to take everything down to the sub floor? If you know any pros and cons of the situation I would appreciate your advice. Thank you!
All that stuff has to come out and be replaced with plywood and cement board. There is too much movement and it will cause your tile to crack or come loose, sooner than later.