Bats can enter attics, wall voids, chimneys, and roof spaces through surprisingly small gaps. The challenge is that simply sealing every opening can trap animals inside, forcing them into living areas or leaving young bats unable to escape.
The safest approach to how to get rid of bats is exclusion: identify the active entry points, seal secondary gaps, install a one-way device over the main exit, allow the bats time to leave, and only then seal the final opening. Timing also matters because young bats may be unable to fly during part of the summer.
1. How Do You Find Where Bats Are Entering Your Home?
Start by watching the exterior around dusk, when bats leave their daytime roost. Look for repeated movement from one section of the roof or siding rather than trying to locate them from inside the attic.
Check the Roofline
Inspect fascia boards, soffits, flashing, roof joints, loose shingles, ridge vents, and gaps where roof sections meet.
Dark staining, droppings below an opening, or repeated evening activity can help identify an active entrance.
Many roost entries are located high on buildings, often more than 10 feet above ground.
Inspect Vents and Chimneys
Check attic vents, gable vents, roof vents, uncapped chimneys, and damaged screens.
A missing chimney cap or loose vent screen can provide direct access to protected roosting space.
Once exclusion is complete, these areas can be covered with correctly fitted wildlife-resistant screening or caps without blocking required ventilation.
Look Around Siding and Utility Openings
Check gaps beneath siding, expansion joints, spaces around pipes or cables, and corners where building materials meet.
Potential access points may be only about 5/16 inch by 1½ inches, depending on the bat species and shape of the opening.
Finding all secondary gaps is essential to how to get rid of bats, because sealing only the obvious hole may leave several alternative entrances.
2. How to Get Rid of Bats
Bat removal should be treated as an exclusion project rather than a trapping project.
Seal Secondary Openings First
Once you know which openings are actively being used, seal the other potential access points with caulk, flashing, mesh, weather-resistant sealant, or another appropriate building material.
Do not close the active exit yet. This prevents bats from simply moving to another gap after a one-way device is installed.
For how to get rid of bats successfully, also seal openings that connect the attic or roosting area directly to living spaces before exterior exclusion begins.
Install a One-Way Exclusion Device
A one-way exclusion device lets bats leave but prevents them from returning.
Depending on the building, this may be a tube, netting system, or purpose-built exclusion flap positioned over the active entrance. It must allow the animals to exit freely without trapping wings or blocking movement.
Do not use exclusion during periods when young bats cannot yet fly. In many parts of the United States, maternity colonies arrive around late April or May, pups are born around late May or June, and the young may remain flightless until approximately mid-July.
Give the Bats Time to Leave
Do not remove the exclusion device the following morning. Bats may not leave the roost every night, especially during poor weather.
Leaving the device in place for several consecutive nights gives the colony enough opportunities to exit.
A practical exclusion window is usually several nights of suitable weather, while local wildlife professionals may recommend longer depending on colony size and site conditions.
The key principle in how to get rid of bats is patience: the goal is an empty roost, not rapid sealing.
Seal the Final Entry Point
After several nights with no bats leaving and no new interior activity, remove the one-way device and permanently seal the final entrance.
Fall and early spring are often the safest periods for bat-proofing. A common seasonal guideline is to avoid exclusion during roughly May through July, when dependent young may still be present.
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3. What to Do if a Bat Is Flying Inside a Room?
Keep people and pets away from the bat and avoid touching it with bare hands.
If there is clearly no possibility that anyone or any pet had physical contact with the bat, close interior doors, open an exterior door or window, turn off unnecessary lights, and allow the bat a clear route outside.
However, if a bat is found in a room with a sleeping person, an unattended child, or someone who may not reliably know whether contact occurred, do not simply release it. Bat bites can be tiny and may not always be noticed.
4. How Do You Safely Clean Up Guano After Bats Are Gone?
Do not begin guano cleanup while bats are still roosting. Bat droppings can be associated with Histoplasma, the fungus that causes histoplasmosis, particularly when large accumulations become dry and dusty. Disturbing contaminated material can release microscopic spores into the air.
For small amounts, avoid dry sweeping or vigorous brushing. Lightly wet the material first so dust is less likely to become airborne, then collect it carefully and dispose of it according to local requirements.
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5. How Do You Provide Alternative Bat Houses Away From Your Home?
A bat house can provide an alternative roost, but installing one does not automatically cause a colony to leave an attic.
Exclusion should still be completed correctly. Useful guidelines include:
- Provide at least 12 feet (3 m) of open space beneath the entrance.
- Install the house high enough to allow bats to drop and take flight.
- Avoid locations surrounded by dense branches.
- Choose sunlight exposure appropriate to the local climate.
- Consider installing two houses within about 100 meters of each other to provide different temperature options.
For how to get rid of bats without removing them from the property entirely, a properly placed alternative roost can complement exclusion while preserving their ecological benefits.
6. FAQs
What Smell Will Keep Bats Away?
Peppermint, mothballs, ammonia, essential oils, and similar remedies are commonly promoted online, but chemical repellents are not considered dependable roost-elimination methods.
Will Bats Leave an Attic on Their Own?
They may leave seasonally, but many bats show strong loyalty to successful roost sites and can return year after year. Waiting without sealing the structure therefore does not guarantee the problem will remain solved.
How Long Does It Take to Get Bats Out of a House?
The actual one-way exclusion usually requires several nights rather than a few hours. Weather, colony size, and seasonal behavior can extend the process.
Do Ultrasonic Bat Repellents Actually Work?
Reliable evidence does not support ultrasonic devices as an effective way to eliminate bats from a building. Chemical repellents and ultrasonic devices are not considered effective substitutes for exclusion.
7. Final Thoughts
The safest answer to how to get rid of bats is not to trap or poison them. Instead, identify every possible entry point, seal unused gaps, install a one-way exclusion device at the active exit, and give the bats enough time to leave before closing the final opening.
Timing matters. Avoid excluding a maternity colony while young bats are unable to fly, and never handle a bat with bare hands.
