Prevent Bat Home Invasions with Foam Insulation

Bat home invasions often occur via the attic. Invading bats can find their way into attics by way of the smallest of openings. They typically only need an opening about a dime’s width in diameter to crawl into your attic. 
Today I installed foam insulation along my home’s roof line, between the rake trim boards and clapboard siding. There is about a ½ to ¾ inch air gap between the two. I installed the foam insulation to prevent bats from congregating at my house and working their way into my attic. 
Over the years I would occasionally find the random bat in my home’s attic, however this year while looking up at my home’s roof during dusk, I saw about a dozen bats exit from under the rake trim boards into the night air. The following afternoon I took a garden hose and sprayed water up into the area where I saw the bats exit the home. Sure enough, about a dozen bats flew out from underneath the rake boards.
By installing the foam insulation, the same foam insulation that is used to wrap plumbing pipes, I hope to prevent the bats from setting up home at my house. I simply used a metal claw to push the insulation up in between the rake boards and the clapboard siding. It wedge in nice and tightly so I am not concerned about it working its way out.
So if you if you see signs of bats in your attic, e.g. bat guano, or observe them exiting the rake boards on your home, consider installing foam insulation tubes in any potential openings along your home’s roof line. It’s inexpensive and easy to do. Just be careful on the ladders. Also, you may want to install the foam insulation tubes shortly after sunset when the bat have exited your home. This way you want trap or squish any when installing the insulation.