Tile falling off

Tile falls off because of the following reasons:

1. There is highly expansive soil and the decking outside the pool is pushing up against the pool structure, thus causing movement of the tile and knocking it off. To remedy this, you must create a larger expansion joint between the pool and the decking than there already is so the two structures do not touch each other.

2. There was not a firm bond on the tile when it was installed. Often, installing in cold climates will cause this. Also certain tile is required to sit for a period of time prior to filling the pool with water.