Please advise. I want to tile my kitchen floor. However, under the vinyl floor that I pulled up is tongue&groove oak harwood. I have heard that you cannot lay tile overtop of this type of tongue&groove because it will shift, thereby cracking the tile or grout. Is this true?
Is there another route I can take without cutting out the tongue&groove? I hoped that I could put down 1/4in hardybacker or cement board over top of the T&G and then thinset and tile on that. Can this be done or will this still result in cracked tile? I want to do it the right way, but I'm trying to avoid cutting out the T&G.
Another issue is that laying the tile over top of the T&G and hardybacker will raise the floor about 3/4in higher than the adjacent floors. Can someone tell me what is an "acceptable" height difference. I understand I could put a transition strip between the two floors, but I don't want it to be noticeable.
Please advise! I appreciate your expertise!!