Help! How do I complain about my tiler?

[hillhead]

Maybe no flexi adhesive used on floor?maybe dusty surface with no priming??
Maybe shower valve seal leaking? the list is endless here!! Unless it's known what prep work and materials were done and used we're in the dark here! maybe only the tiler knows this all.

 

[Hawkofeagles]

did he lay a bed of adhesive under the HBB before screwing it down and If so how far apart were the screws??

 

[CBTC]

'flexible' gear isnt going to make up for lack of strength / too much deflection in the sub-floor, whatever was used. This is most likely the issue with regard to the floor.