u/Acceptable-Try1292

Commercial owner here, self-contractor by necessity and with humble awareness of my limited expertise to anyone doing this full time...

So should I put the quarry tile on the wall over FRP that goes top to bottom or should I only put the FRP to the top of the tile and caulk there?

AI, which I came to increasingly trust lately for bunch of other reasons, but which I am also well aware tends to make incorrect recommendations with very very convincing tone, says it should definitely be on the drywall with glue on the back, caulk on top and grout between and under.

Any real life work I've seen so far has always been over FRP.

What's your choice and why?