For a while now, Susan and I have been intruiged by a damp patch which appears on the wall of our house at irregular but frequent intervals.
Damp is a frustrating thing - it appear and disappears, and there are many causes. One patch of damp may be caused by a number of conditions, so even when you have removed one cause there may still be work to be done.
I did discover with the aid of a hammer that the lime render at the bottom of this part of the wall had been damaged in the past and had been repaired with concrete. This I have now chipped away, the theory being that the concrete was forming a barrier holding the water in.
I have a feeling this is not the end of the story of this particular patch - there is a concrete surface next to the wall which probably isnt helping either, but I hope I have at least made a start. This problem appears only cosmetic as the inside of the wall doesn't appear to have a problem, which is A Good Thing.