So the skirting board beneath a radiator has swelled up and the paint has come off. I can't see any leaks on the radiator, it swelled a little last year and has now got worse. The wall it's on is the side of a detached house (into neighbours driveway). Does this swelling look like a damp issue? if so if it's not the radiator where could it be coming from? Any advice greatly appreciated.
I've lived in the property for 6 years, and it only started swelling last year, no work has been done on the house around the wall.