How to Keep Bats Out of Your Attic

by Kate Hall May 27, 2025 Home & Garden

If you've ever heard scratching, fluttering, or tiny squeaks above your ceiling, you're not alone. Bats love attics—and once they find their way in, they rarely leave on their own.

Your attic is the perfect bat hideout: quiet, dark, and undisturbed. It's warm in the winter and safe from predators. Unfortunately, once bats move in, they leave behind guano (droppings), urine, and a whole host of problems. And the longer they stay, the harder it gets to remove them.

So how do you keep bats out of your attic for good—without harming them or turning your house into a construction site?

Here’s what you need to know.

Why Bats Choose Your Attic

Bats are looking for shelter. In nature, they roost in caves, trees, and crevices. But as forests shrink and development spreads, they often turn to buildings for cover. Attics offer the same protection they’d get in a cave—without the competition.

They enter through gaps as small as 1/2 inch—roof vents, chimney caps, soffits, or cracks along the roofline. Once inside, they settle in and start leaving droppings (guano), which can grow mold, attract pests, and even become a health risk if disturbed.

And bats are creatures of habit. Once they find a roost, they return night after night. That’s why stopping them early is so important.

Step 1: Seal Up Entry Points (After They Leave)

The most common advice you’ll hear is to “seal up your attic”—and that’s true, but only after bats are gone. If you seal up holes while bats are still inside, they’ll either get trapped (which is inhumane) or find a new way into your home.

Inspect your home carefully for gaps, vents, or cracks where bats might be sneaking in. Wait until you're sure they’ve left, then seal the openings with mesh, caulk, or foam sealant. You can also install a one-way bat cone so they can leave but not get back in.

Step 2: Avoid Common DIY Mistakes

We tried all the tricks—spraying peppermint oil, hanging foil, leaving lights on all night. Most of them did nothing. Some even made things worse by chasing the bats deeper into our walls.

The truth is, bats are smart. They quickly adapt to smells and static noises. Once they’ve chosen your attic, they won’t give it up easily unless it starts to feel unsafe.

Step 3: Make the Space Unwelcoming (the Right Way)

The most effective solution we found was changing how the attic “felt” to the bats—without harming them. That meant using something that made the environment uncomfortable, like high-frequency sound that messes with their echolocation.

Bats rely on sound to navigate. If that sound gets scrambled, they feel lost, stressed, and vulnerable. And when that happens, they leave. It’s safe, silent, and doesn’t involve traps, chemicals, or cleanup.

We tested a few devices that claimed to do this. Only one worked.

What Finally Worked: Bat Fortress Mini

After trying sprays, lights, and gadgets that didn’t help, we plugged in a Bat Fortress Mini ultrasonic repeller. It was simple—just plug it into a wall outlet near the attic entrance, and it runs 24/7 without making a sound.

It uses high-frequency ultrasonic waves that disrupt how bats move and communicate. Humans and pets can’t hear it, but bats definitely can. Within a few days, the scratching and squeaking sounds were gone. No more droppings. No more fluttering. Just a clean, quiet attic.

Why Bat Fortress Mini Is the Best Prevention Tool

1. Disrupts Echolocation – Makes your attic feel unsafe without hurting bats or using chemicals.
2. Plug-and-Play – No setup, no batteries, and no learning curve. Just plug it in and let it work.
3. Safe for Families and Pets – No poisons, smells, or harmful effects.
4. Works Continuously – Runs 24/7 with barely any energy use.
5. Backed by Results – Hundreds of homeowners say it helped them solve their bat problem quickly and safely.

Final Thoughts: Keep Bats Out Before the Mess Starts

Once bats move into your attic, the cleanup can be expensive—and risky. Guano carries health hazards, and even one bat can leave a mess if left alone. The smartest solution is to prevent them from roosting in the first place.

Bat Fortress Mini is the easiest way to do that. It’s safe, humane, and requires zero effort. Just plug it in and let it create an environment bats don’t want to return to.

1. 100% humane – No traps or harm to wildlife
2. Silent to people and pets
3. No chemicals, no cleanup
4. Effective in attics, garages, and crawlspaces
5. Trusted by real homeowners across the U.S.

If you’re tired of worrying about bats in your attic, stop the problem before it starts. One small device can protect your entire home—quietly, safely, and for good.