I have an 1890 two story that I'm remodeling. The studs are "shotgun", that is they go from the foundation to the attic (no insulation). We have plaster and lath pulled off of walls in a couple of rooms. We've had bats come in and fly around in the house several evenings. I've caught several and turned them loose outside. I know that I need to seal up every hole in the house to prevent them coming in, but that will be a long process. Does anyone know how to discourage them from setting up housekeeping in my house? I don't want to harm them (did you know that a bat will eat it's own weight in mosquitoes every night? ). I just don't want to share my house with them! My wife totally freaks at then flying around inside!