A few weeks after painting a bedroom wall weird damp pacthes appeared. I've stripped a few patches patches back to reveal discoloured plaster
However more spots are appearing all over the wall.
It's a victorian terrace and directly above is a chimney stack which has been removed, however...
I have a leaking stopcock in my cellar, a good few litres a day. However the external stopcock is broken and Thames Water show little interest in repairing it.
I understand I can freeze the internal pipe and replace the leaking stopcock that way. How big a job and how much would a fair price...
Hi Albo99 did you sort your problem as I appear to have the same. Two wet shadows on a bedroom wall below the area of the chimney. They only appeared after i repainted the walls, however it was matt paint on top of wallpaper paste (to size the wall) on top of old matt paint.