We begin bat inspections by performing a thorough inspection of your home and property to identify all probable primary and secondary entry points. Many people believe that bats can only enter their home through an open window or through the chimney. This isn't always the case, though. Bats typically enter through soffit gaps, roof vents, loose or missing roof shingles, warped siding, and small cracks or breaches in brick walls as small as 1/2 inch. Bats can gain enter access to a home via the fascia board.