Bat Removal & Exclusion in Mentor, OH

Bats in your Mentor home

Mentor's bats are mostly big brown bats, with little browns now scarce after white-nose disease. The lake shore and marsh are superb hunting — clouds of insects over the water at dusk — and the ranch attics inland are superb roosting: warm, dry and entered through gaps as small as a finger's width at gable vents, ridge lines and chimney flashing loosened by Snowbelt winters. Most homeowners never hear them. They find droppings below the entry, or a faint staining at a vent.

Ohio treats bats more strictly than almost any other attic animal, and honestly: exclusion is the only legal removal method, it can only be done for hire by a licensed Commercial Nuisance Wild Animal Control Operator, and the calendar is fenced by two blackouts. The legal windows are April 1–May 15 and August 1–Oct 15. Everything on this page follows from those dates.

The two blackouts: maternity and hibernation

From May 16 through July 31, no exclusion or eviction is allowed when five or more bats are present, without prior written permission from the Chief of the ODNR Division of Wildlife — because pups are born flightless, and sealing the exits strands them inside to die. From October 15 through March 31, no exclusion is allowed for any bats without that same written permission, because big brown bats hibernate inside Ohio attics. A Mentor colony found in January is not ignoring you; it is asleep, and the law leaves it alone until spring.

Why call before the window closes

The April 1–May 15 window is short, and every Mentor homeowner who found droppings over the winter wants it. An inspection in February or March — perfectly legal at any time — lets our crew count the exits, identify where the colony leaves at dusk, and have valves and sealing material ready so the exclusion happens in the window instead of being scheduled after it. The same logic applies in July: inspect during the maternity blackout, exclude starting August 1. Waiting until you see bats in May usually means waiting until August.

Where bats enter a Mentor ranch

Ranch construction gives bats a long, low menu: the ridge vent along a shallow roof, gable-end vents with screens corroded by lake air and snow, the flashing where a masonry chimney meets shingles that ice has shifted, and the seam where a garage roof ties into the house. Bats also roost behind shutters and in the gap behind fascia. Our crew watches the house at dusk when needed — where bats pour out at sunset is where the valve goes, and every other gap on the building gets sealed so the colony cannot simply move doors.

Guano, rabies and a bat in the living room

Bat droppings accumulate under a roost and dried guano can carry the fungus that causes histoplasmosis, so cleanup is done with proper protection and without dry-sweeping it into the air. On rabies: bats are Ohio's top confirmed rabies species by case count, ahead of raccoons. Most bats are not rabid, but a bat found in a room where someone was sleeping, or with a child or pet, should never be handled — keep the room closed and call, and talk to your doctor or health department about the exposure. Our crew handles that animal the way Ohio rules require, including reporting where an exposure occurred.

How a timed exclusion actually works

Inside a legal window, our crew seals every secondary gap on the house, then fits a one-way bat valve at the main exit. Bats leave at dusk to hunt the lake shore, cannot re-enter, and relocate themselves to a natural roost over the following nights. Once exit watches confirm the attic is empty, the valve comes down and the last opening is sealed permanently. Outside a window, the honest service is the inspection, the count, and a dated plan — not a valve hung illegally in July or January.