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Wildlife removal and exclusion Β· North Jersey

One-Way Doors for Squirrel Exclusion: How They Work

Straight answers from Silver Bullet Pest Control, a licensed exterminator based in Garfield, NJ, serving Bergen, Passaic, Essex and Hudson counties. Call or text 973-510-2585. Hablamos espaΓ±ol.

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One-Way Doors for Squirrel Exclusion: How They Work

A one-way door (exclusion door) is a short metal tunnel mounted over the squirrels' entry hole with a flap that opens outward only. Squirrels leave to find food, can't get back in, and move on. It's the most humane, reliable way to get squirrels out, but only after every other gap is sealed and only when there are no babies left behind. Silver Bullet Pest Control installs them across North Jersey: 973-510-2585.

How a one-way door works

The device is a tube or box made of metal mesh or sheet metal. One end is fastened tight over the hole the squirrels are using. The other end has a hinged flap or spring door that opens when a squirrel pushes from the inside and closes behind it. From the outside, the squirrel can't pull the flap open.

Squirrels leave the attic every day to eat. Within a day or two, all the adults have gone out and can't get back in. Once we confirm there's no more activity, we remove the door and permanently seal the hole with heavy-duty material.

The steps, in order

  1. Inspect the whole roofline and find every opening, not just the obvious one.
  2. Check for babies, especially February to April and July to September.
  3. Seal every secondary gap so the one-way door is the only way out.
  4. Install the one-way door on the main entry.
  5. Monitor for activity over the next few days.
  6. Remove the door and seal the last hole once the attic is empty.

What we see on these jobs

The three situations behind most of these calls in North Jersey:

Squirrel eating nuts
Squirrels

Squirrels in the Attic or Walls

  • Running and scratching in the morning and evening
  • Chewed fascia, soffits or vents
  • Nesting material in the attic

We get squirrels out with one-way doors and seal the roofline so they can't chew back in. Exclusion, not relocation.

Raccoon on a roof near an opening it could use to get inside
Raccoons

Raccoons in the Attic or Chimney

  • Heavy thumping at night
  • Torn vents, shingles or soffits
  • Droppings and a strong smell

Raccoons tear their way in and do real damage. We remove them from the house and close the opening with heavy-duty materials.

Chipmunk resting near a tree trunk
Chipmunks & more

Chipmunks, Skunks & Other Wildlife

  • Burrows along walkways and foundations
  • Animals under porches and sheds
  • Digging in the yard and garden

Ground animals cause foundation and yard problems. We find where they live and block access so they move on.

When a one-way door is the wrong tool

  • Babies in the attic. Young squirrels can't leave on their own. Sealing the mother out leads to dead babies and a mother chewing a new hole.
  • A squirrel loose in the living space. That's an emergency; it needs to be guided out or removed first. See emergency squirrel removal.
  • Other gaps left open. If there's a second hole, squirrels just use it.
  • Bats. Bats use a different kind of excluder and have strict timing rules. See bat exclusion.

One-way door vs. trapping

One-way doorTrapping
Handling animalsNone; they leave on their ownTrapped animals must be handled
BabiesPlanned around before installMother can be removed, babies left
Legal issuesSimpleNJ rules on trapping and release
Stops re-entryYes, with sealingNo, unless sealing is done too

Simple ways to prevent it

🌳

Trim branches

Keep tree limbs about 6 to 8 feet from the roof so squirrels can't jump on.

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Lock the trash

Use cans with tight lids and bungee cords. Raccoons learn trash night fast.

πŸ”©

Cap the chimney

A sturdy chimney cap keeps out raccoons, squirrels and birds.

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Check the roofline

Look for chewed soffit corners, loose vents and gaps at roof returns each spring and fall.

How Silver Bullet handles it

1

Call or text a photo

Tell us what you're seeing and where. A photo often lets us identify the pest right away. We answer 24/7 for emergencies.

2

Inspection

A licensed tech finds the source: where the pest lives, how it gets in and what draws it.

3

Treatment or removal

We use the right method for the pest, placed where it works and kept away from kids and pets.

4

Seal and prevent

We close entry points and tell you what to change so the problem doesn't come back.

Get Help From a Licensed Exterminator

Call or text 973-510-2585 for the fastest answer, or tell us what's going on and we'll get back to you quickly.

Calls we get every week

  • Scratching or thumping in the attic
  • A squirrel or raccoon inside the house
  • A raccoon in the chimney
  • Chewed soffits, vents or gutters
  • Animals under a porch, deck or shed
πŸ“ž Call 973-510-2585

Request Service

πŸ”’ Your info stays private Β· Hablamos espaΓ±ol.

What's bugging you? - Step 1 of 3

Frequently Asked Questions

What is a one-way door for squirrels?

A metal tube over the entry hole with a flap that only opens outward, so squirrels can leave but not return.

How long does a one-way door take to work?

Usually a day or two, since squirrels leave daily to eat.

Can squirrels get back in after a one-way door?

Not through the door. That's why every other gap must be sealed first.

Is a one-way door humane?

Yes. No trapping or handling; squirrels leave on their own.

Can I use a one-way door in spring?

Only after checking for babies. If babies are present, the plan changes.

What happens after the squirrels are out?

The door is removed and the hole is sealed permanently with heavy-duty material.

Do you use one-way doors for raccoons?

Similar exclusion methods are used for raccoons, sized and built stronger, with extra care around kits.

Are you licensed for wildlife in New Jersey?

Yes. Silver Bullet Pest Control is licensed by the NJ Division of Fish and Wildlife and holds NJ Pesticide License 90568B.

What if a squirrel or raccoon gets into my living room?

Close interior doors to keep it in one room, open an outside door or window in that room if it's safe, keep pets away and call 973-510-2585. We answer 24/7.

Can I see the entry points you found?

Yes. We show you the openings, and photos when possible, so you know exactly what was sealed.

Do you install them in my town?

We serve Bergen, Passaic, Essex and Hudson counties. Call 973-510-2585.

Serving North Jersey

Based in Garfield, we serve these towns and the rest of Bergen, Passaic, Essex and Hudson counties.

Our service area

Union County

973-510-2585
  • Berkeley Heights
  • Clark
  • Cranford
  • Elizabeth
  • Fanwood
  • Garwood
  • Hillside
  • Kenilworth
  • Linden
  • Mountainside
  • New Providence
  • Plainfield
  • Rahway
  • Roselle
  • Roselle Park
  • Scotch Plains
  • Springfield
  • Summit
  • Union
  • Westfield

Morris County

973-510-2585
  • Boonton
  • Butler
  • Cedar Knolls
  • Chatham
  • Denville
  • Dover
  • East Hanover
  • Florham Park
  • Hanover
  • Kinnelon
  • Lincoln Park
  • Madison
  • Mendham
  • Montville
  • Morris Plains
  • Morristown
  • Mountain Lakes
  • Parsippany
  • Pequannock
  • Randolph
  • Riverdale
  • Rockaway
  • Roxbury
  • Whippany

Updated November 2026 by the Silver Bullet Pest Control team, Garfield, NJ β€’ NJ License 90568B

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