[ssgharkness020147]

Some years ago a neighbor had the same problem. The solution: a nail gun.

My parents had the same problem in the house (built in 1908). There is a local guy who actually specialized in the problem. He was great, he got all the bats out of the house. Then went around and sealed up all the holes. Trust me if this guy could seal al the holes in a 100 year old house your pole barn should be a breeze. From then on he gauranteed his work for a year, if a bat were to get in to the houe we just called him and he would come and remove it free of charge. Every so often we have him back to do "touch up" work. I'm sure that there is someone like this in your area.