The success or failure of most tile projects is proportional to the amount of floor prep provided and how much attention to detail was paid. When corners are cut to save time and/or money on a job, the result almost always results in failure.
The job in this case is a locker and shower room. The floor being replaced was medium-quality, low level loop carpet which stopped approximately 24 in. from the four stall showers in the room. Over time, the almost always wet carpet caused a less than desirable odor and unhealthy situation. The sensible solution was to replace the carpet with a low maintenance, hygienic ceramic tile.