Bats can get into crevices as thin as 3/8 in so you will need to understand that this is NOT a simple issue. If you have a bat in the house and suspect a large colony of bats in the attic or walls - you should get a pro to evaluate your situation ASAP. Bats usually gain entry along a brick wall at the top point, sometimes they go in at the chimney cap as well. One thing is for sure you will almost always have a bad odor, and dirty brown area where they gain entry. Check out our picture area here.
Top 5 Questions about bat removal in Louisiana - New Orleans - Covington - Mandeville - Slidell - Baton Rouge.