Over time the mortar holding a wall tile may fail to do its job letting a tile become loose and fall.
Tiles falling off wall tile adhesive.
This means it is thick enough to easily bridge differences between the two mating surfaces.
As ceramic tile gets larger the wall or floor surface must be flatter and flatter.
The most common cause for falling tiles is water infiltrations.
Then prep the wall and use the adhesive made specifically for the tile you have.
Was the adhesive left on the wall for too long before you placed the tiles.
Use a glue that is gap filling.
If water gets behind the tiles and in the grout mildew can grow and it will cause the adhesive to deteriorate.
Many people strip the loose tiles sand them and reposition with new adhesive.
Make sure that the tile adhesive that you use is water resistant.
Or take them all down putting wax paper between each tile so they don t get damaged.
This in conjunction with skinned over adhesive is the root cause of your tile failure.
Tile falls off wall organic glue skins over.
The wall surface could have been irregular with humps and dips in it.
Be sure to spray the wall surface with water to activate the glue.
Since the tile is flat and in the same plane the wall surface must also be a perfect match.
Grouting has been done too early.
Thinset is best adhesive.
Use gorilla glue to replace each one.
Make sure that they don t come into contact with any water during this period.
Apply grout around the tile on the gaps between the tiles.
If no adhesive is applied then the tiles will fall off.
Use a piece of cloth to remove any adhesive that is displaced above the tiles.
The adhesive needs to be applied evenly and on every tile.
How do you fix it.
Though more common in an older home rogue tiles can be found in new homes as well.
Lloyd s bathroom tiles failed when either the wall wasn t prepared properly or the mastic was exposed to too much.
This is not just a threat for your tiles but also for your health.
Press the new tile down over the adhesives you have just applied.
Clean off the old stuff from the back of the tile and from the wall.
Incorrect tile grout used.
Otherwise the repair may not hold and the tile may also sit a little higher than the ones next to it.
Give the adhesives 24 hours to set.