S
Spud
found out today from a builder that it wasnt the fact that his guys had dot and dabbed( 5 small spots) 60x60 porcelain tiles on 12mm plywood walls that all his tiles had come loose and failed it was actually because the client had turned off the air control unit in the pool house that had caused the failure of his tile installation ,how does that cause tiles to fail I asked its is the excess moisture which causes movement I was told, okay thanks for the info I will pass it on to the british standards institute :mad2: