I noticed that the paint on a wall adjacent to our kitchen back door was 'bubbling up'. The paint has been there about 3-4 years. I rubbed down to the plaster, and discovered salt had formed on the surface.
Can anyone explain what's going on. The house is 22 years old, there are no signs of damp, and the affected area is well away (15 ft) from any water supplies or pipes. It's a small area about 3 inches above the skirting board.