Bats do not chew holes. They find ones that are already there, and they only need a tiny opening.

Common entries

Gaps where the roof meets the wall, loose flashing, vent edges, chimney tops and gaps around pipes are common.

How to find them

Watch the house at dusk for bats leaving. Look for dark stains below small gaps.

How to close them

Wait until the bats are out and any pups can fly, then use one-way exits first and seal each gap with steel mesh and caulk.