I don't want to bore anyone that reads this with details but if you had a load of work done on your house including a large patio area and quickly discovered the patio had been laid badly what would you do? I've had three independent patio layers round since who have all said pretty much the same thing i.e it's all gonna have to come up. Has anyone had similar problems? I can and will hold back his final payment but to be honest I'm a little concerned about a mini war kicking off!! Any advice?