Bonam,
Check in here -->
Fulltiming for more info on this.
Bob,
Use to be in the tile industry and would have never thought it to be a good idea to have tile in something that flex's like these chassis's do. My current rig has tile and so far so good. I would check with the local tile supplier like a Dal Tile to see what innovative types of adhesives they have out now. (It's been about 12 years since I was in that industry) For grouts we used a latex additive to give it some flex. I can't imagine that my tile in my rig is on anything more that 3/4" plywood.