1. Irregular surface (Tiles are not level)
  2. Inconsistent size
  3. Buckling (Popping up of tiles after installation)
  4. Debonding (Detachment of tiles from either between tile and adhesive or between adhesive and substrate)
  5. Crazing / (Fine hairline crack, either circular or random on tiles. Almost all tiles from the same batch will be affected. Fine hairline crack in area near entrance, corners and around columns. The hairline crack pattern is usually directional and continuous across tiles.
  6. Cracks (From body to glaze, either randomly and confined to certain tiles, or directional / randomly across all tiles)
  7. Effluorescence (Formation of whitish film on surface especially in damp area.)
  8. Staining
  9. Chemical attack / disfigurement
  10. Fungus or mould due to water seepage
  11. Inconsistent shade