Uninvited company can create chaos in any home, whether it’s mice in your basement, squirrels in your attic, or bats in your belfry. Not only are they a nuisance, but they can make you and your family sick, and it’s best if you can keep them from ever coming in.
If an opening to your home as small as one-quarter inch exists, mice can find their way in, and squirrels can wriggle through an opening just 2-1/2 inches in diameter.