What is the only permanent method to rid a building of bats?

The only permanent method to rid a building of bats is bat-proofing. This involves sealing entry points, ensuring that bats cannot access the building and establishing barriers that prevent them from returning. Bat-proofing is essential because it addresses the root of the problem by closing off the pathways that bats use to enter and roost in structures.

Other methods, such as trapping and removal, can temporarily reduce the number of bats, but they do not prevent new bats from entering the building. Similarly, while permanently installed ultrasound transmitters may deter bats temporarily by emitting sounds that are unpleasant to them, they do not provide a definitive solution to stopping bats from roosting in a structure. Therefore, bat-proofing is recognized as the most effective long-term strategy for permanently managing bat populations in buildings.