I dropped out of this thread after the first page when I noticed that we started re-inventing the wheel. But I couldn't help but notice that there were suggestions about communicating with tile guys. On many jobs you don't get an opportunity to do that. You complete your rough and come back for the final. But, let's stop for a moment and analyze the tile guy's job :
- Mix the thin set
- Apply the thin set
- Cut the tile to size if required
- Set the tile in place
- Apply the grout
Think about the level of person you're dealing with. Unlike us who have 1" thick Code books, whose contents we have to be extremely knowkedgable about and CEU courses for our licenses, these guys have 5 processes to go through to make their job complete. Don't even think about asking them to cut a divot in the tile for your mounting screw. Use a self adhesive plate or a screwless cover plate.