How to Block a Possum Hole?

Possums aren’t picky about their crash pads. Attics, crawlspaces, wall gaps, and even under your deck all qualify as prime real estate if there’s a gap big enough to squeeze through. If you’ve spotted signs of movement or damage, the question isn’t just what’s getting in, it’s how do you seal it off for good?

That’s where this guide comes in. We’re walking you through exactly how to block a possum hole using real-world methods that actually work, not the vague stuff you’ll find elsewhere. By the time you’re done reading, you’ll know what to look for, what to use, and when to call the experts at AAAC Wildlife Removal before those freeloaders move in again.

Spot the Sneaky Entry: Where Possums Slip In

If you think possums need a gaping hole to get inside, think again. A full-grown adult can squeeze through gaps as small as 3 inches, about the size of a baseball. These entry points often hide in plain sight around your home’s foundation, eaves, or roofline.

Start by walking your property at dusk or dawn when possums are most active. Shine a flashlight along vent edges, crawlspace gaps, broken soffits, or loose siding. You can also sprinkle flour or cornstarch near suspicious holes, if you see tiny footprints the next day, you’ve found your possum highway. AAAC Wildlife Removal pros use this same method during inspections to track movement fast and accurately.

Temporary Block, Safe Eviction: Let Them Out, Not Back In

Before sealing anything up, you need to make sure the possum isn’t still inside, or you’ll trap them in and create a whole new problem. The goal here is to give them one way out and zero ways back in.

That’s where a one-way exit device comes in handy. You can rig a flap from a sturdy piece of sheet metal, plexiglass, or heavy plastic and hinge it over the hole so it opens outward. The possum can push its way out, but can’t nudge it open from the outside again. AAAC Wildlife Removal uses pro-grade exclusion devices that do exactly this, minus the guesswork or duct tape disasters.

Permanent, Possum-Proof Sealing: Materials That Actually Work

Once you’re sure the possum is gone, it’s time to seal that hole like a pro. This isn’t the moment for duct tape or cardboard patches, those critters will chew right through.

You need materials that hold up against claws, teeth, and weather. Here’s what AAAC Wildlife Removal recommends (and uses on real homes every day):

• Galvanized hardware cloth (16-gauge or stronger): Ideal for covering vents, crawlspace gaps, or broken eaves. It’s chew-resistant and flexible for odd-shaped holes.
• Sheet metal or flashing: Best for roofline gaps, fascia boards, and attic access points where possums love to sneak in.
• Concrete patch or mortar mix: Use this for foundation holes, cracks in brickwork, or structural gaps that need a hard seal.
• Exterior caulk or expanding foam: Great for small, non-structural holes, but always back it with mesh to keep it possum-proof.

For serious entry points under decks or sheds, AAAC crews dig and bury hardware cloth 6–12 inches into the soil to stop digging. That’s the kind of reinforcement DIY jobs usually miss, and why some possums keep coming back.

Remove the Incentives: Don’t Make Your Home a Buffet

Even a perfectly sealed hole won’t stop a determined possum if your yard still feels like an all-you-can-eat trash party. Blocking entry only works long-term if you cut off the food, water, and shelter that brought them in the first place. Start with the basics:

• Secure all trash bins with tight-fitting lids or latches. Possums love leftovers and aren’t shy about dumpster diving.
• Clear out debris piles, firewood stacks, and yard junk that create cozy hiding spots. If it looks like a possum motel, it’s time to clean house.
• Trim branches back at least 5 feet from your roofline. Possums are excellent climbers and use tree limbs as highways straight into your attic.

AAAC Wildlife Removal crews always include these prevention tips as part of the exclusion process, because sealing holes without changing the environment is like locking your front door and leaving the windows wide open.

Smart Extras That Help (Optional, But Worth It)

Once you’ve sealed the holes and cleaned up the buffet, a few extra touches can help keep curious possums from testing your defenses. These aren’t mandatory, but they work surprisingly well when paired with physical exclusion. Here are a few low-effort, high-payoff add-ons:

• Motion-activated lights or sprinklers: Possums are nocturnal and hate surprises. Sudden lights or sprays will often send them scrambling.
• String lights or garden LEDs: Keeping areas under decks or near sheds well-lit at night can discourage nesting.
• Pet hair or scent deterrents: Scatter fur from your dog or cat around past entry points. Possums sniff out potential predators and usually don’t want the smoke.
• DIY vinegar or garlic spray: Some homeowners swear by strong-smelling sprays, but results are mixed. Use them as a backup, not a standalone solution.

These extras won’t fix the problem alone, but as part of a full prevention setup, they add just enough friction to make possums rethink their plans. AAAC Wildlife Removal uses a mix of these when clients want extra reinforcement without going full Fort Knox.

When to Call AAAC: Skip the Guesswork, Get It Done Right

If you’re dealing with multiple entry points, hearing strange noises at night, or just don’t want to risk a face-to-face encounter with a cranky possum, it’s time to call in the pros. Sealing a hole is one thing, making sure there’s no one still inside is another story.

AAAC Wildlife Removal knows exactly where to look and how to block access without harming the animal or breaking the law. In many states, handling or relocating wildlife requires permits, and trust us, possum removal isn’t something you want to DIY in the dark. Here’s what we bring to the table:

• Safe, humane eviction backed by state regulations
• Permanent sealing using top-grade materials
• Full inspection of your roofline, vents, crawlspaces, and foundation
• Repairs, cleanup, and follow-up so you’re not left guessing

We’ve blocked hundreds of possum holes across homes just like yours, and we stand by every fix with real results and local expertise.

Seal It Tight, Sleep Easy

A possum hole isn’t just a small gap, it’s an open invitation. The moment you find one, the clock starts ticking. You’ve got two choices: let them settle in, or block it off for good using the right methods and materials.

If you’re up for the job, now you’ve got the know-how to do it safely and effectively. If you’d rather not crawl around your attic with mesh and a flashlight, AAAC Wildlife Removal is here to handle it all; fast, clean, and done right the first time.

Call AAAC Wildlife Removal Today!

Don’t wait for scratching in the walls or midnight attic raids to confirm what you already suspect. If you’ve spotted a possum hole, or think one might be hiding nearby, AAAC Wildlife Removal is ready to help. We’ll inspect, evict, seal, and secure your space so you can rest easy.

Give us a call or request a quote online. One visit from our expert team, and that hole becomes a non-issue for good. Let’s keep wildlife where it belongs, outside.