[Evans, Marv]

I would think one of the best things you can do is install wire fabric over every hole they can possibly go through - and that can get down to maybe a half inch. Identify all the places, cut your fabric pieces, & attach (staple or ?) after they leave in the evening. It will probably take a while to identify all the places they can enter. I have a bat problem on my patio. They wanted to roost (hang?) in the really small space where the 4x12 rafters meet the fascia boards. I had to staple small pieces of wire fabric (quarter inch grid) around the base of each one to keep them out. They also would get into the small space between the top of the fascia and the roof boards where a really small opening was because of shrinkage. I closed those up with oakum and clear silicon caulk. Now sometimes they try to hang up in the corners where the rafters meet the fascias. I push them down with a long stick until they fly away. I think they're getting the message, because I don't have many trying to stay there anymore. I like bats, but they can be a real nuisance. I don't think I'd make a bat house. It might draw lots of bats & the overflow would try to use my house.