Hi, can anyone advise? Recently had new vokera combi heating system installed followed by new bathroom suite. Pipes are now banging very loudly primarily upstairs although have noticed a certain clicking noise from main radiator downstairs? I've had several plumbers out to look but still no solution. I am now considering calling out a futher engineer but I am not sure if the problem lies with a plumber or heating engineer? Access to the bathroom piping is now very limited as tiled in. The pipes under the bathroom floor are also tiled but before that was done the previous plumber installed the insulation around these pipes so I don't know how the banging could be so bad when they are protected? Could the problem be elsewhere? Thank you for any help.