Reduce the Dangers Caused by Toxic Black Mold Inside Your Home The most prominent place in your home for mold growth is inside your walls. If there is mold growing on your walls, it's important to take care of it right away. You can often tell that you have a problem with mold on your walls when you see paint that is cracked. This will mean that the wall covering is wet and may become moldy. If you have any kind of water damage on your walls, you probably have a mold problem.