The original plan was to have 2 (outside) walls framed, boarded and plastered and the 2 internal boarded and plastered. I was just prepping the walls when I found a rather wet damp patch in the upper corner of one of outer walls, just under an unused chimney stack. Should I postpone drylining work and does and one have any advice on what I should do about the damp. (Chimney being removed soon due to other work going on).
Some background: Old stone farmhouse, rough-cast rendered and painted.