| I read David Taylor's reasoning on the link provided. While I agree that tile directly over vinyl is not a good idea, I know that tile over backerboard over vinyl works fine. no thinset under the backer board, just screws. I did that in a high traffic area and it lasted more than 15 years without a problem.
Taylor uses the phrase "not approved" several times in his post. Not approved by whom? Unless it's specifically mandated by code, installation practices and materials are usually developed by manufacturers and trade groups and recommended as the best method. That doesn't mean that it is the only method. In some cases certain materials or methods may be required by the manufacturer to meet warranty but I don't think that applies here.
For the OP, here's my suggestion if you absolutely don't want to pull up old vinyl. Assuming the floor structure is stiff and sound, scuff it up with a belt sander. Install the tile over the vinyl using mastic instead of thinset. I think you'll get better adhesion. I've used mastic over laminate countertops and it worked great.
I look at it as what's the worst that can happen? Cracked tile or more likely cracked grout lines? Ifg you're willing to accept that chance- go for it. The house isn't going to fall down around your ears.  |