-
Feel your pain. When I first bought my house, all windows were sealed shut by a layer of black mould, most walls were sopping wet underneath thick wallpaper, and the chipboard kitchen cabinets were saturated with grease from the deep fat fryer full of rancid oil that was lurking in a cupboard. When I viewed the house, the occupants had clothes drying all over the place, with all windows closed and the heating off in the middle of winter.
It needed full plaster-off, back to brick in most rooms; had to hire industrial heaters and fans to try to dry the walls out. Cost frikkin fortune in leccy bills to do this back then, not helped by the gas & leccy meters being key & card...
I get the impression that the previous owners kept the windows shut all the time and didn't have the heating on much; there were signs of damp in a lot of places, but we've never seen it re-emerge while we've been here. So that may be it.