DIY Doctor UK DIY Forums

I have a damp patchon my my dinning room wall by the radiator, a friend of mine said he thought it was a leaking central heating pipe. my problem is that the floor is concrete how can i check if the central heating is leaking with out breaking up the floor. i have a boiler in the kitchen and hotwater cylinder under the stairs.
any advise is greatly welcome

A plumber may be able to check the boiler pressure without too much disruption but its not a job you will be able to do yourself.