If your walls are turning black in a corner, it’s no accident: find out what it really means (and how to fix it)
Have you spotted a small black spot in a corner of the wall? At first, you think it’s probably a bit of dust or a forgotten mark… and then the days go by, and this area widens, darkens, and sometimes, a musty smell begins to be noticed. Nothing trivial about that. These marks are often … Lire plus