I ordered 90 cases of Continental Slate Persian gold tile 18X18. The tiles are terrible quality. I am a paraplegic and postponed surgery to get the tile from a single run. While we were installing there were glue spots from where the cases were glued together. There were other spots which looked similar. When we started to clean tile after installation the majority of the spots would not come off. They are actually drips from glazing sprayers. These sprayers were clogged causing a very uneven application of glaze. Some tile seen to have none after grouting and cleaning. This problem did not appear until after the cleaning. I was told the tile were within normal variations and the tiles with spots would be replaced but only those tiles and no labor cost. This is not acceptable to me. Some of this tile is installed over thermosoft heat which could be damaged plus the cost of new mortar and grout.