Completed a scratch render job back in October. Got a call back to say 3 areas constantly look Wet/ stained. Had a look today there are 3 areas around the size of a football that look wet but he said constantly looks like that and never dries out. At first sight it looks like damp but not sure why they are in 3 seperate places and not all the way across but just at 3 random points on the wall. I'm puzzled any ideas?? Cheers