Hello,
My bedroom has 3 external walls, and in a Victorian Terrace, about 5 years ago we had a waterproof coating put on the outside of the house and since then the damp problems seems to be getting worse, I have applied damp prevention paint to the wall before wall papering but this has not helped, i have also tried using a dehumidifier but that didn't appear to help.
Any ideas?
Cheers