Originally Posted by kamoo
It is done alot in RVs, busses and Ive also seen it in limo busses. ... Epoxy grout has been mentioned and the grout that comes in a tube which I believe is essentially sanded colored caulking for the joints. They also make a membrane that isolates the floor and makes your tile floating so to speak. Im not far enough along to have done the research but if I beat you to it I'll let you know what I use.
When I ripped out the old tile out of JBIV, I used backerboard (used in wet areas in homes) screwed (SST screws) to the existig 3/4 subfloor. For the adhesive, I used a transportation-grade adhesive from the Bostik line of products: 2200TS. For the "grout" I used Bostik's 940FS. Before I used the 200TS, I tested it on a backerboard first with the tile I wanted to use. Let it cure, then tested how "easy" it was to remove the tile. It wouldn't come off with a crowbar. The bond between the tile and backerboard was stronger than the backboard itself. It is critical to use a good trowel to smooth the adhesive out for good contact. I used a 1/8" v-trowel I think.