Can anyone offer any experienced or expert advice? I'm being woken most nights especially around 1am and again around 4 - 6am to my floor and bed vibrating. A neighbour has said his water heater/boiler had new valve fitted. He said it's noisy but didn't think it would cause vibration in my next door flat. It's happening now asI'm typing and I put my ear to various walls to try to locate it. The only place with any sound is next to this neighbour and there isa pressured sound in the wall. Is this sounding like aboiler/water heater problem? If so what sort of problems are there? I'm wondering about offering to pay for my neighbour to have aplumber check the boiler, as it's affecting me, but if they checkedduring the day when there often isn't any perceived vibration, wouldthey still find a problem? Thoughts and advicewelcome on this one. I seriously cannot sleep at night as itvibrates the whole flat and there's nowhere to place my mattress tosleep!