I've just walked away from one. 80x80 tiles floor down for two weeks at 80mm thickness, wanted it done before the kitchen is fitted. The guy didn't know anything about the screed and didn't know if it had been commissioned. I don't want hassle like that!Whilst on the subject of liquid screeds I just found out that I've lost a 90 m2 job (80x80 porc)job due to me refusing to tile till the floor got commisioned.(says he couldn't wait till the utilities get connected??) I even talked to bal to see if I could use flex bone but they wouldn't guarantee it without the floor getting commisioned first.hes now got a part-time plumber in to tile it.