If your walls are turning black in a corner, it’s no accident: find out what it really means (and how to fix it)
Black spots appearing in the corners of walls might seem minor at first—a smudge or speck of dirt—but over time they can spread, darken, and emit a musty odor. While it’s not cause for panic, these spots often signal a deeper moisture problem behind your walls. Acting quickly can prevent further damage and restore a…