I just purchased a home that is 10 yrs old and plan to replace one of the existing bathtubs. it is a traditional bath with no whirlpool and has tile on the front of it...which has to go! I want to replace with a whirlpool and thought i could do a drop in type and retile the front with something more modern. What is behind the tile and what is it normally attached to. Have seen the drop in tubs and doesn't appear that it could hold tile. any ideas?