How to Stop Mice From Getting Under a Door {Pest Proof A Door}

Do you believe the gap underneath your door is way too small for a mouse to fit through? I’m sorry, but you may be very wrong about this. It’s time to find out how to stop mice from getting under a door.

How do you pest-proof a door? Do you know about door metal guards, excluders, bristle strips, door sweeps and rubber guards?

It’s time to look into the details about how to stop mice from getting under a door. This article will also help you to pest-proof your doors from other rodents and insects as well.

How to Stop Mice From Getting Under a Door

The first step is to make sure that your doors are closed and that there are no holes, cracks or crevices alongside the hinges.

Prevent mice from entering by using door sweeps, rubber guards, bristle strips, metal mesh wiring on screen doors and excluders.

Also consider placing deterrents such as cayenne pepper or peppermint oil underneath doorways.

How Do I Stop Mice From Coming Under My Door?

Stopping mice from entering under your door may involve rubber seals or steel mesh. You may use an item called an excluder. This is a type of door sweep that is made of aluminum or vinyl.

The sweep underneath the door can mount to pretty much any type of entry or exit. It must make contact with the floor to create a threshold. This will create a gentle seal that will make it practically impossible for a mouse to get in or out.

Keep in mind that a gap of 0.8 inches in diameter is all it takes for a mouse to be able to squeeze underneath your door.

Will Putting a Towel Under the Door Keep Mice Out?

A towel underneath the door is not enough to keep a mouse out of your room. This is because the mouse is able to dislocat its skull and slip right underneath the gap of a towel. A towel is too soft and does not create enough of a seal.

A mouse can slip through the gap the thickness of a pencil. If you are using towels or clothes underneath your doorway, you may be able to get away with it, but some resilient mice will find their way through.

It is better to consider a door excluder or door sweeps made of metal or rubber that are thicker and act as tougher deterrents for mice to get through.

What Can I Put Under My Door to Keep Mice Out?

If you would like to keep mice out of rooms and prevent them from slipping underneath doors, you should consider a metal door draft stopper. These are made of aluminum alloy instead of rubber.

Rodents like mice will have a difficult time trying to find a way underneath it. Even though mice can dislocate their skulls and fit through gaps the size of a pencil, the metal door draft stopper will create enough of an intrusion to prevent mice, rats are other insects to get through.

You can also purchase metal door stoppers that include rubber sweeps with an aluminum alloy block. This will make contact with the floor but still allows you to easily open and close the door.

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Can Mice Get In Under Doors?

Yes. Mice can get underneath the doors. Even if your door has the tiniest gap that would be way too small for the body of a mouse to fit through, you would be surprised at what a mouse can do.

They can dislocate their skulls, flatten their rib cages and fit through gaps the thickness of a pen 0.8 inches in diameter. This is why you should consider draft excluders or metal door stoppers with rubber rubber sweeps at the bottom of your door.

This will seal the gap and make contact with the floor to prevent a mouse from being able to slip through.

How Do You Pest Proof a Door?

Pest proofing the door would disallow pests from entering buildings and rooms. They are adapted to fit through the tiniest of gaps. This includes mice. If you would like to rodent-proof a door, you should install a door sweep.

It creates a threshold at the bottom. You can also consider weather stripping around the sides or the top of your door as well. In this way,  you can pest proof a door.

There should be no gap underneath the doorway because a mouse can flatten its rib cage and dislocate its skull to be able to fit through.

Any other insects smaller than a mouse would have a very easy time to slip through doorways that do not have draft excluders or rubber door sweeps.

Do Door Sweeps Keep Out Mice?

Yes. A door sweep is your best solution for keeping mice from slipping underneath your doors. A door sweep is fast and smart solution.  You should also consider weather strips and seals around the sides and top of your door as well.

Excluding the access of rodents from entering your home would require you to use an excluder that covers the gaps underneath doors.

A mouse can slip underneath the door that is revealing a gap 0.8 inches or more in diameter. If you can fit a pencil underneath the door, a mouse can slip through as well.

What Is an Excluder Door Sweep?

An excluder door sweep fills gaps underneath doors and creates impenetrable barriers for rodents and other pests from slipping through underneath. They usually come with weather seals as well. You can install it on just about any door.

If you have gap underneath of 1 inch, you can still end up with mice being able to flatten the rib cages slip through the opening.

Door excluders are built with aluminum, copper, bronze or rubber. They can install easily and give you the assurance of preventing rodents or other insects from entering underneath the doorways.

Do Brush Door Sweeps Keep Mice Out?

Are you wondering do bristle strips stop mice? If you are considering a brush door sweep, you may not be able to exclude all rodents or insects. It will exclude them from entering, but there are resilient rodents like mice who can persevere through these bristle strips.

The strips must be able to make contact with the surface of the floor. The door must be able to open and close without the strips impeding its ability. Door sweeps made of aluminum or rubber work better than bristle strips in our opinion.

What Can I Put Under a Door to Stop Mice from Entering?

If you’re looking for a quick solution with an item handy in your house,  look for the following:

  • hardcover books
  • a piece of timber
  • peppermint oil
  • cayenne pepper
  • ammonia

The first two items will deter a mouse from entering underneath the doorway and the latter three items will repel a mouse from wishing to cross through this gap.

These are temporary solutions and we still recommend that you purchased door sweeps, excluders, weather strips or other types of seals that you can place a underneath the door made of aluminum or rubber.

Pest Proof Doors to keep Rodents Out

Mice and rats are able to enter buildings underneath exterior doors. You must try to improve this design flaw. Install door sweeps to create a threshold underneath. They can be made of vinyl, rubber or aluminum.

A tight-fitting door sweep is like a strip that creates a seal underneath your door to prevent mice, other rodents and insects from entering. It operates like a kick plate but it should not interfere with the swinging of the door.

Weather stripping around the door also helps to seal any other gaps that rodents can get through. We highly recommend a door metal guard with a rubber seal underneath it. The metal guard is usually made of aluminum alloy.

Mice or rats are able to smell what’s cooking underneath the doorway. Make sure the area underneath the door is clean with soaps, bleach, ammonia or repellents like peppermint oil. This will prevent many rodents or insects from wishing to enter.


Mice are able to chew through many materials to be able to fit underneath doorways. They can also dislocate their skulls and flatten their rib cages to be able to fit through gaps that you consider to be way too small for a rodent that size to squeeze through.

If a pencil can fit underneath the doorway, so can the mouse. When mice enter, they can carry fleas with them and other types of illnesses that could become a bigger issue for you.

Besides installing door strips such as excluders or sweeps on a door made of aluminum or rubber, we also recommend that you place deterrent foul-smelling odors such as ammonia, cayenne pepper or peppermint to deter mice from wishing to enter.


Thanks for visiting for the best information to help you to make the pest control process easy, safe & affordable.

Jason Barrett

Hello, I'm Jason. I have 11 years of experience in dealing with pests. I try to provide you the best information that'll help you to make the pest control process easy & affordable