We live in Mass. & all our floors were originally vinyl. We have had them all done in tile right over the vinyl for years and they are perfect. The contractor puts either cement board, wire screed, or this other plastic material over the vinyl first, and the installation of that is most important. Of course, here we have plywood floors over wood joists so its easy to screw the underlying material over the vinyl. I'm not sure how that works when the floor under the vinyl is concrete as in TV. If you use a reputable tile contractor I would trust their judgement.
Rick
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