Failed Floor

[Cris]

If tiles are porcelain there's a possibility that incorrect addy was used. Regular addy with no additive used ie porcelplus, can cause tiles to fail.... come across it in past. Especially if tiles were not back buttered

 

[Flintstone]

ribbs in the addy are still visible ...looks like minimum contact to the tile is a poss cause

I doubt it

 

[kevsalt]

why do you doubt it