Thanks for the response. I don't think the wall structure is a problem - boiler is mounted to brick /mortar wall which in turn is our joining wall. The boiler was never this noisy for the previous 5 years - something has changed in the boiler over the past 3 -4 months.
Am not sure why he only...
HI, My neighbour has a Worcester Bosch 24CDi boiler which is in her front bedroom attached to the adjoining wall of my front bedroom. Having lived alongside her for 5 years we were used to the slight noise that the boiler made in our front bedroom. Around 3 months ago however we now hear a low...