How Do I Get Rid of Rats in Cavity Walls {Can I Scare Them Away?}

You can hear it. There is no denying it. Darn it. You saw a rat. I saw it too. I have the same problem as you. How Do I Get Rid of Rats in Cavity Walls?

What do we do now? How do we prevent more rats from entering our walls? How do we take control of our house back? Should we scare them, poison them or call for help?

In this article, we will discuss what is needed to be done when you and I need to figure out, “How Do I Get Rid of Rats in Cavity Walls? 

How Do I Get Rid of Rats in Cavity Walls?

The best way of getting rid of rats in cavity walls is to call a professional pest removal expert to help. This is a serious issue. You do not know how many rats you have nesting in your walls at this point.

Placing rat poison, rat repellent odors such as peppermint oil or ultrasonic noise devices may help to get them out of your walls. Seal all entry holes and apply concrete at baseboards to prevent them from coming back into your cavity walls again.

What to Do if You Have Rats in Your Walls?

If you have rats in your walls, you need to eliminate them to prevent the spread of this dangerous rodent carrying diseases or able to damage wiring and other area of your property.

  • Identify entry points.
  • Locate nests.
  • Find food storages areas or caches.
  • Apply rat poison.
  • Smoke them out.
  • Seal all cracks, voids and crevices.
  • Add concrete to baseboards.
  • Consult or use a professional to help you.

This may sound like a lot of work and on top of it all, it could be a health hazard to you. These professionals will come suited up and ready to tackle this serious issue without your health being put at risk.

Can Rats Climb Up Cavity Walls?

Rats are excellent climbers. They can discover plenty of routes to gain access into a property. They can climb shrubs, branches, brickwork and concrete. They will find footholds where you thought was impossible.

The most common way rats make their way into your home is by finding cavity walls. They will look for voids, openings, cracks and entries that aren’t sealed.

Can You Scare Rats Out of Walls?

You can try to irritate a rat and get rid of it by applying deterrent such as:

  • Peppermint oil
  • Ultrasonic noise devices

Peppermint Oil

This is one of many essential oils or other odors that rats hate. You can also skip this altogether for bait traps with rat poison.

Ultrasonic Noise Devices

These deterrents scare or annoy rats who can hear sounds at frequencies that we cannot in the range of 22 kHz to 35 kHz.

YouTube video

How Long Does It Take To Get Rats Out of Your Walls?

It can take 3-7 days to get rats out of your walls. You may need the help of a professional to determine whether or not all the rats have died or left the area.

What’s worse, you will need to figure out if they have left food storage caches lying around in hidden areas. These foods may rot and attract many other pests like insects who will discover the caches and feed on them.

Rodent traps that are made with bait or mechanically produced are best handled by professionals when the discovery is made that your cavity wall has allowed these rodents to move in and nest inside your home.

How Do Rats Get in the Cavity Wall?

Rats get into cavity walls because they have found an opening and they have a strong insistence to find shelter for warmth and protection.

Rats are versatile and can fit into the tiniest holes or gaps. They can flatten their ribs and dislocate their skulls to make their way in when you thought it wasn’t possible.

Sealing involved using caulking, silicone, concrete and bait traps or mechanical traps to deter or prevent rats from getting into cavity walls. These places are perfect because we or other threats do not or cannot usually enter.

They can enter cavity walls from:

  • Chewed Plastic Air Bricks
  • Holes in Walls
  • Burrows Under the Walls
  • Drainage Faults

How Do I Get Rid of Rodents in My Wall Cavity?

Rodents that get in your wall cavity do so because they are seeking safety and shelter. They are successful and now it’s our turn to get them out. We may need an expert, but let’s review some tips and strategies to see what we can do first:

  • Prevention
  • Poisons and Traps
  • Get Help


  1. Clear you property from surrounding vegetation and shrubs or logs that makes it easy for rats or other rodents to climb aboard and enter your home.
  2. Check for hollow areas and open entryways.
  3. Seal doorways, trash and packaging.
  4. Check plumbing and drains for openings or water leaks.

Poisons and Traps

It’s time to get aggressive. Lay out poison bait traps. The problem is that these wall cavities will make it hard for you to reach inside to lay the traps in areas where it is necessary.

Also, it will be very hard to remove the dead rats when you are successful in killing them with this poison. Catch and release traps are not for everyone.

Can you handle a screaming or squirming live rat in a mechanical trap or glue trap? I can’t and won’t.

Get Help

Maybe you have an experienced friend or relative to help you, but owing them a big favor in return should involve more than pizza or a drink. It is better if you think long-term and look at the big picture.

The entire property needs a thorough check. There could be nests and food caches all over the area and hidden so well that you cannot find them. A professional will inspect and help to clear the area while helping you seal entryways to make sure these pests do not return.


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