How to Get Rid of Mice Under Floorboards: The Step-by-Step Guide

Rodent Guide
Written By Rodent Guide

I believe in treating all creatures with respect. My mission is to ensure everyone understands how to protect their home from rodents without using cruel methods.

Do you have mice under your floorboards? If so, you’re not alone.

Mice are a common problem, and they can be challenging to eliminate. In this blog post, we will provide a step-by-step guide on how to get rid of mice under floorboards.

We will also discuss some tips and tricks that can help make the process easier. So if you’re looking for ways to eliminate those pesky mice, keep reading!

How to Get Rid of Mice Under Floorboards

Signs of Mice Under Floorboards

As a DIY pest control expert, I know that identifying the signs of mice under your floorboards is critical to successfully eradicating these unwanted guests from your home. Here’s an overview of the signs you should look out for:

  1. Strange noises: If you hear scratching, scurrying, or squeaking sounds from beneath your floorboards, this may be a sign that you have mice living underneath.
  2. Droppings: Mouse droppings are small, dark, and pellet-like in shape. Seeing them around your home, especially near your floorboards, is a clear sign that mice are present.
  3. Gnaw marks: Mice have strong teeth that they use to gnaw on anything they can find. Check your floorboards, walls, and any nearby items for signs of gnaw marks.
  4. Nests: Mice like to build nests in warm, secluded areas. Finding a nest made of shredded materials like fabric or paper may signify that mice live nearby.
  5. Foul odors: Mice produce a distinct musky smell that can become more noticeable as their population grows. If you notice an unusual smell coming from your floorboards, it may indicate that you have mice living underneath.

Identifying these signs early on can help you take action before a mouse infestation becomes too difficult.

Remember, it’s essential to approach pest control with a humane and ethical mindset.

Why Do I Have Mice Under Floorboards?

There are a few reasons you may have mice living under your floorboards.

For one, mice are excellent climbers and can squeeze into tiny spaces. This means they can easily access your home through cracks and holes in the foundation.

Once inside, mice often build their nests in dark, secluded areas, such as attics and crawlspaces. If your home has any of these conditions, mice will likely take advantage of it.

Additionally, mice are attracted to food sources, so if you have any food spilled on the floor or crumbs left out, this may also attract mice to your home. While mice may seem like harmless creatures, they can cause a lot of damage to your home.

They can gnaw on electrical wires, chew through wood and drywall, and contaminate food sources with droppings. In addition, mice can carry diseases that seriously threaten humans.

If you suspect you have mice in your home, immediately eliminating them is essential. Otherwise, you could be dealing with a serious infestation.

How To Get Rid Of Mice Under Floorboards

1. Find out where the mice are coming from

mouse entry point

One of the first steps in removing mice floorboards is finding out where they are coming from. There are a few ways to do this:

  • Look for signs of mice, such as droppings, gnawed material, or tracks.
  • Check for openings where mice could enter the house. These might be holes in the walls, gaps around doors and windows, or cracks in the floor.
  • Listen for mice squeaking or scratching.

Once you have determined where the mice are coming from, you can close off those entrances and get rid of the mice.

2. Seal off mice entry points

mouse entry point hole

Once you have identified the source of the mice, you can begin to take steps to get rid of them. Block any entrances that the mice may be using to get under the

One of the most important things you can do to get rid of mice under floorboards is to seal off mice entry points. You can do this by caulking up any cracks or holes in your walls, floors, and ceilings. You should also ensure that your doors and windows are properly sealed and that there are no gaps around them.

3. Set mouse traps to capture the mice

mouse trap (2)

Setting mouse traps is one of the best ways to eliminate mice under floorboards. There are various mouse traps on the market, so you can choose the one that best suits your needs.

Snap traps work well, as do live catch mouse traps (but you must get rid of any live mice you catch).

When setting a mouse trap, be sure to place it in an area where the mice are likely to travel. You also want to make sure that the trap is set in a way that will ensure that the mice will be caught. For example, if you’re using a snap trap, make sure the bait is placed in the middle of the trap.

If you have pets or kids, you should use live catch traps to remove the chances of catching a finger or paw in a snap trap.

Place the traps in areas you find in step 1 to catch them more efficiently.

4. Consider using an ultrasonic pest repellent

ultrasonic mouse repellent

An ultrasonic pest repeller is an electronic device that emits ultrasonic waves. These waves are designed to repel pests, such as mice. There are a few things you should keep in mind when using an ultrasonic pest repeller:

  1. Make sure the device is properly plugged in and turned on.
  2. The device should be placed in the center of the room, away from walls and furniture.
  3. The device may take a few days to weeks to start working.
  4. Consider using an ultrasonic pest repellent in conjunction with other methods, such as traps or poison bait (inside live catch traps).

5. Remove clutter and clean up once you’ve caught the mice


Once you have successfully captured the mice, it is essential to clean up the mess they have made. This includes cleaning up any droppings or urine and repairing any damage they may have caused.

Be sure to wear gloves and a mask when cleaning up mouse droppings, and dispose of them in a sealed bag. Wipe down the area with a disinfectant to kill any germs or bacteria.

If the mice have caused damage to your home, such as chewing through walls or floors, you will need to repair this damage to prevent future mice from getting in.

Following these steps, you can remove mice under floorboards and keep them from returning. Mice are a serious problem that should not be ignored. If you think you might have mice in your home, take action immediately to get rid of them.

Consider Using a Pest Control Company

If you are not confident in dealing with the mice yourself, it’s time to consider a pest control company. Mice are known for carrying diseases and can quickly wreak havoc in your home if they’re not controlled.

A pest control company will have the experience and expertise to get rid of mice quickly and efficiently. Plus, they’ll be able to provide tips on preventing mice from returning in the future.

So, if you see mice under your floorboards, don’t hesitate to call a pest control company.

What are the signs that the mice removal methods have been successful long-term?

Long-term success in mice removal is typically indicated by a lack of new droppings, no sounds of movement or scratching from under the floorboards, and no sightings of mice for an extended period. Consistent monitoring and maintaining preventative measures are key to ensuring that mice do not return.

Can certain floor materials or home layouts affect the effectiveness of these mouse removal strategies?

Yes, the type of flooring and the layout of a home can impact the effectiveness of mouse removal strategies. For example, mice might find it easier to hide or nest in homes with ample clutter or in areas that are difficult to access for cleaning or inspection. Hardwood floors might offer fewer hiding spots than carpeted areas, potentially making detection and removal efforts more straightforward.

What are the environmental impacts of using ultrasonic pest repellents and other suggested methods?

Ultrasonic pest repellents are marketed as a humane and chemical-free option, suggesting minimal direct environmental impact. However, the effectiveness and potential effects on non-target wildlife or household pets remain subjects of debate. It’s important to consider the broader ecological implications and to opt for solutions that are both effective and have minimal negative impact on the environment and non-target species.


If you are having a problem with mice under floorboards, there are some things that you can do to try and get rid of them.

The first step is to try and seal up any cracks or holes in your floorboards.

Then, you need to catch them! Do this by using several mouse traps around any entry points and the outside of your home.

Once you’ve caught the mice, you should take steps to drive them away, such as using an ultrasonic device and other natural mouse repellents.

Finally, clean up after the mice and avoid accumulating clutter, which attracts mice.

Be patient, it may take a while for the mice to leave, but if you keep at it, you should be able to get rid of them for good.

Have you had success getting rid of mice using these methods? Let us know in the comments.

Good luck!

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About the Rodent Guide

I’m an expert in do-it-yourself rodent control. For more than 20 years, I’ve dedicated my life to helping people live harmoniously alongside these critters by sharing rodent control solutions that are effective and kind.

I believe in treating all creatures with respect. My mission is to ensure everyone understands how to protect their home from rodents without using cruel methods.

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