How To Tell If There's Mold In The Walls. If you find that there's mold behind the walls or have a suspicion that this is the case, there are a few things you can do right away to try to at least curb its something else worth looking at is potential areas where excess moisture may get into your home. If you think there's mold in your walls, get on your hands and knees and smell the electrical outlets.
It is pretty tough to detect until it starts coming through the walls if you notice that your home has a bit of a moldy or musty smell to it, that might also indicate that there may be a mold issue.
Too much moisture and standing water can be a breeding ground for. Centers for disease control and prevention. How to remove mold from painted wall. Mold thrives in humid environments, so it's likely that there's too much humidity in your home.