QUESTION

Tile Edge Flaking - Some of the 12x12 wall ceramic tiles in our shower seem to be flaking on the edges. The floor tiles that get wet do not have this happening. The grout seems to be fine between all the wall tiles. What would cause the edges to do this? Do I need to reseal the tiles? Thank you.

ANSWER

ANSWER - It is odd that you are saying that a ceramic tile edges on your shower wall are flaking.  Normally ceramic tile would not flake. It could chip, but normally you don't see chipping on walls that occurred after it was installed.  It might actually be a natural stone rather than a ceramic tile.  Some types of natural stones can spall (flaking/deteriorates) when subjected to excessive moisture.

If it is ceramic tile and it has chipped you can't really repair it other than try to temporarily fix it by painting the chips with epoxy paint.

If it is a natural stone then cleaning it and then sealing it might help, but for there to be excessive moisture on the wall to cause it would suggest there may be some bigger problems under the tile that is allowing the moisture to collect there.  Good Luck.