why does my ceramic tile flooring keep coming up?

my house is on a peer and beam foundation, would that have anything to do with it? i installed the floor myself using the hardybacker and a good mortar mix.

Public Comments

1. idk......try using crazy glue...it works 4 me....lots n lots of crazy glue.........
2. maybe the floor wasn't level before the mud was applied.
3. Yes, the stability of your pier and beam foundation can negatively affect your tile floor. The backer board is more about achieving a good bond between floor and tile and is not meant to override flexing in the foundational structure. Your question leads me to think that you believe that is the likely problem.
4. It could have been a half dozen reasons, without seeing it, hard to tell. Did you use a good sealer before laying the tile? Was the floor dry, clean and ready to tile? Was the mortar to dry, did you "butter" the tile? Was the floor perfectly level without lumps and bumps and, did you leave it dry completely before using? I make sure the back of my tile is wet or, at least damp. Make sure the floor is not to dry.
5. Could be the thin set was too dry when it was laid if the problem is everywhere. If its only in certain areas its most likely the structure of the floor (joists) is giving some. Not exactly dangerous, but movement will pop-off the tiles. To make repairs, chisel out the dried mortar underneath. Use FlexBond thinset, it is somewhat elastic and is more forgiving of movement than others. Use the right notched trowel to apply to the floor, then spread a little on the bottom of the tile, too, to aid in adhesion.
6. the floor is not strong enough to support the weight. You will need to add more support beams underneath your house to prevent the flexing.