That is often a sign that mold is growing behind the wall or in the wall material itself.
Checking for mold in walls.
Mold isn t always right out in the open where you can see it.
Water stains potently signal the presence of molds there.
Water and mold go hand in hand.
If you have a serious mold problem in your walls you ll see visual cues.
Often it s lurking in dark spaces such as walls and the ceiling where you can t see it.
You can also look for discolorations that bleed through fresh paint.
Keep reading for key tips on checking for mold and what to do about it if you find mold.
So water stains on your walls or ceiling provide a good clue for mold growth.
The following are some of the most common spots for mold to grow undetected and therefore smart locations to test for mold.
Behind your refrigerator beneath stacks of newspapers or cardboard behind the drywall in wall stud spaces that contain plumbing lines below sinks behind the wallboard around.
How to check for mold in walls visually.