Hi all, I am trying to figure out what is causing the flaking on one of the walls at my property. I moved into this place a few months ago and found this damp patch a bit above the skirting board - paint was flaking and chalking. My assumption was that the room was not ventilated properly and this was causing it; it's a north-facing room with single glazing; I scraped off the flaking and chalking paint and applied some paint to cover the patch as I wanted to see if this would be ok if the room was properly ventilated. After a month the chalking began again. Could it be because when I applied the paint to cover the patch I did not apply any primer? I am planning on painting the entire room so I want to do this properly. The wall itself is not north-facing but neighbours another property. Any ideas on what might cause this and how I should fix it?
Knock off back to brick and look. Check drains. No cracks and condition where water collects around drain hole