Bat Exclusion
	The ideal time for bat exclusion is some time in the winter when your bats have migrated south. Your first step should be creating a one-way guard or screen over any vents. This will allow any remaining or new bats to leave your attic but not re-enter through the vent. Attic vents or gables are the most common entry points for bats, but they can enter through any opening. These openings can be difficult or impossible to detect unless you know what you're looking for. Sealing these smaller attic holes can be the best reason to call a professional. Ultrasound devices that emit high-frequency sounds can be effective to prevent future bat problems but are rarely enough to drive away an established bat colony.