Getting Rid of Annoying Bats in the Attic

Edited by
Inga Cryton
Reading Time: 28 minutes.
Updated: .

The very first indication of infestation is scratching and squeaking noises that come from the walls, chimney and ceiling.

How to get colonies of bats out of your attic? It would be wrong to state that there is a single effective solution. People practice various methods. Some of them are much more efficient than others, but home owners keep looking for the right ones till the time all the pests are eliminated.

We have made up our minds to assist you in this tough process, saving your time, effort and money. We suggest a few worthy mechanic and chemical options to choose from. Read, choose, use and succeed.

Bat Removal from Your Attic with a Bat-Proofing System

Remove bats from your atticIf you decide to exclude these animals from your area for many reasons, try to concentrate all your efforts on bat-proofing the area. And before telling you what should be done, we want to point out that there are some forbidden steps.

What you should NOT do:

  1. Expect that animal control services will help you.
  2. Rely on local dogcatchers.
  3. Take care of the problem yourself.
  4. Leave these creatures, their droppings and parasites neglected.
  5. Pick up or touch bats unprotected.
  6. Seal up the entry points before the pests leave the attic.

The process of bat removal from attic can be started with sealing all the entry points in the right way. When you know where the animals are coming, seal up the holes. If you choose to accomplish the aim during the daytime, they are going to be trapped inside the house. Later on they will look for additional ways out.

This is why the entire procedure should be done at night, when they leave the area. Of course, this method is not totally reliable, as far not all animals leave the place every night. However, in most cases it really works.

To exclude bats you should use effective materials like flashing, foam caulking, insulation and screening.
Stainless steel rustproof scouring pads or stainless steel wool are also perfect materials for blocking all narrow cracks.

There are several important places in which your house may need to be caulked:

  • Between window drip caps, door drip caps and also siding;
  • Between window sills, the main body of the house and porches;
  • At joints between window frames, joints between door frames, as well as siding;
  • At sills where the wood structure meets foundation;
  • At the corners that are formed by siding;
  • Where masonry and chimney meet the siding;
  • Where walls meet the eves on the structure;
  • Where wires and pipes penetrate the ceiling below the attic;
  • Where storm windows meet window frames;
  • Outside water faucets;
  • Outside special breaks in the house surface.

If you have found any deep crevices on exteriors, you can effectively use spray foam. It gets an additional sealing caulking coat. Caulking is a usual weapon used in the process of bat-proofing. It is also possible to get some screening strips for filling wide gaps before caulking.

Popular Devices for Effective Bat Removal

Bats exclusion deviceHow can you remove bats from your attic? Today’s market is ready to offer many useful devices that have already proven their efficacy.

Your primer task is to read the basic feature descriptions and choose the ones that will work in your case:

Solution 1. Exclusion Devices

This devices are usually installed on all the bat entry and exit points. The variants include netting or cones, which form a single-way door that allows the animals to fly out of the attic, but not fly back into it.

The devices should be installed on all the points you have found for at least 2-3 days. Then a homeowner monitors the situation whether all the creatures have left the area.

Exclusions devices are the simplest way to exclude pests.
  • The most successful option is a bat valve installation. The devices are installed at the entry holes that are always marked with urine and guano from the pests. Most valves can be trimmed in order to fit various exit holes for a successful removal.
    The constructions are easily mounted and are available with a fastening strap. Others can be caulked in place.
  • In case you are searching for the simplest and cheapest option, choose flexible mesh netting.
    Just seal off all the points of entry using a solid seal except for the one that bats can freely exit. Use the netting over the hole, but do not seal it up. Attack the netting creating a funnel to guide the flying creatures out. As soon as they slip out of the net they will be free to fly, but won’t get back ever again.
    As soon as all the bats are safely out, seal off the point and start cleaning.

Solution 2. Buying Bat Homes

FYI, pests have a keen sense of location. They will definitely return to their nests. To eliminate them from the attic but not from the territory use a bat house that can hold up to 100 bats. The higher the house is placed, the more chances will be used.

Hang it close to one of the most favorite entry points. And this is how you will increase the odds of their infesting the new residence.

You can make the house yourself. If you have no time or skills, you can buy them.
Today many variants are sold commercially and are available at cost between $15-50.

Solution 3. Ultrasonic Pest Repelling Device

CLEANRTH CB006 RepellerMost devices of this kind can cover the area of 5,000 square feet. But the best bat repellent, CLEANRTH, can cover up to 7,000 ft² in open areas.

Such waves are absorbed by textured surfaces, including drapes, walls, carpets or furniture, grass, wood floor, and ceramic tile that reflect ultrasound. So, when such a device is installed somewhere in an attic with insulation or any other building material, they cover a very small area.

The device that broadcasts from one location point to another cannot effectively cover more than one room.

Solution 4. High-Frequency Repellants

They are extremely popular in the process of getting bats out of your attic. As a rule, they let off a high-pitched noise. It is heard only by these pests.

If there are bats in your building, they can soon get immune to the sound, so they will just ignore it.

The noise is so disturbing that it makes them get away. Such high-frequency devices are used to repel bats, as well as many other pesky animals that may settle somewhere in or around your home. Just place the device in the attic, where they are or may invade.

Chemicals for Bat Removal: Do They Work?

Remove bats from attic by chemicalToday there are no chemical substances that are officially registered for use on bats. Some time ago and DDT were commonly used to poison them. But the main problem is that they seep into the house and are admitted to be hazardous to people.

The use of such chemicals increases the risks of homeowners and their pets coming into contacts with dead animals. So, these days such use is regarded to be illegal.

Naphthalene crystals. This is the only registered pesticide that doesn’t kill but repels pests. The process of getting rid of annoying bats in the attic with their help can be successful.

Nearly 3 pounds of flakes or crystals should be spread in empty spaces or all over the attic floor to repel the animals. The flakes are the most effective in air spaces that are confined. The crystals disappear in a couple of weeks, so the bats return. It means that naphthalene crystals are only a temporary solution. These repellents keep the flying creatures away, but not for good.

Use in the areas where bats are roosting.

In addition, there is another drawback worth mentioning: pets and small children get a hold of these pesticides. They can get sick or die.

Aerosol dog and cat repellents are also working. These are used in the case when bats are roosting behind shutters, in sheltered areas, or above the doors. However, you should not spray these repellents on them, as they harm the animals. Unfortunately, not all sprays are equally effective. And, as in the case with naphthalene crystals, they lead to a temporary, not permanent result.

You should clearly understand that there are no quick fixes or any shortcuts when it comes to bat elimination. Choose the right pesticide, device, method, materials, time, and location and start working.

If you find all of the above-mentioned solutions and techniques too tough to be followed or worthless, address a bat removal professional who is trained in the identification of all entry holes, their sealing, and animals exclusion.

You can find further details of Bats Control here.

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  1. The roof of my house is infested with bats,in the evening we can see a few hundreds of them flying out from the crevices in the roof edges.Now we notice a stain on the ceiling probably the bat’s urine and droppings.I live in Kuala Lumpur,Malaysia.Have tried alot of method to get rid of them before employing people to close off the holes and crevices.Please help by giving some tips.Thank you

  2. I live in grenada which is part of the Caribbean islands.there are 3 bats that hangs from the roof of the villa where I works. I try pelting objects at them but they will always return. Can you help me please?

  3. hi, i live in Guyana in the Caribbean and my ceiling is infested with lots of bats i need help they are destroying my roof i am afraid my ceiling will come crashing down one day .

  4. Hi I live in Trinidad & Tobago an island in the caribbean. There are a lot of bat in my ceiling right over my bed. I have tried many things to get rid of them but all in vain. Can you help me please?

    • Where can I get the ultrasonic unit or device to buy? Please let me know.

  5. Best way to get rid of bats is by using several methods together. I got rid of bats in my attic by purchasing a electronic ultrasonic device and scattering mothballs ( use the ones made of napthalene ). The moth balls drove them out while the ultrasonic device kept them away. Just make sure the ultrasonic device works on bats ( they usually have a setting specifically for bats/rodents or will automatically sweep through sound frequencies at random to work against many types of pests ). The ultrasonic devices usually are about the size of a small to large alarm clock. Also note you may need to replace the ultrasonic every year or so as they wear out and become less effective over time. Even if the device seems to be working it is best to replace every 1 to 2 years as the sounds are inaudible to us it is very hard to tell when the device is worn out and needs to be replaced.

    If your problem with bats is outside you can get outdoor ultrasonic units and treat the area with a hot pepper oil based animal repellent (strong hot pepper oils are highly irritating to bats and rodents and most animals) . Don’t try to make your own hot pepper repellent, as anything available to you in the kitchen won’t be concentrated enough to work ( strength usually needs to be near what police/military uses in their pepper sprays! ). The pepper repellent will need to be reapplied every week or sooner if area was exposed to rain or wet conditions. I have also heard that if they keep nesting on a specific spot on the outside of a house that spikes ( like the ones used to keep away pigeons and other bird pests might help).

  6. I have bats in attic where can I get ultrasonic repellent at??

    • lowes

  7. Always make sure to not trap bats in your attic or other space, by sealing it up, because you can trap them in there and then you will have alot of dead bats in your attic. You should put in the netting over the spaces as they describe and leave it so all the bats can escape for 4 or 5 nights. Then you can permanently seal the cracks. Breeding colonies of bats serve important functions eating insects and are protected by law in the US and in most countries. Their populations are disappearing from the planet in many areas, and several million bats have died off on the east coast of the United States in only the last few years.

  8. I have discovered bats in my attic. I live in Alberta Canada and have been told they will leave in the fall to head south to warmer climates. I am going to wait for them to leave as fall is here soon before I seal off the entry points. I am not looking forward to cleaning the mess after they leave. I do appreciate them for there insect eating prowess and will be putting up bat houses for their return in the spring.

    • Did your bats actually leave in the fall? I’m in Ontario, Canada and have a similar situation… thanks!

  9. I have a brown bat that has found its way into the house and I think it is due to a vent that a very bad home improvement guy left unsealed. So i have now sealed every possible entrance. The bat flies into all my rooms at night so I have all lights out. I open windows in all the rooms and eventuallly it flies out. i think he lives in the attic but he may also live in a hug tree. When I lived on a lake, the bat colony was in the tree next to my kitchen and flew out at dusk to eat the bugs around thee lake. Never came into the house. I had a skunk mom who lived under the house and used to wait for me to come home and walk to my cottage with me. I had a rat hat lived in an old computer in a box. i had some mice that liked to sleep in a storage closet in old coat pockets and I had a duck that fought the foxes and lived in an old dog house. I had a beaver ranger put in a sealed lake (no way for him to do any work) so he ate applies in my tree, found out he was alone and stayed with migating gueese every night on the lake shore (quarry) and in the winter built a structure on the hill by our property that was made of mud and trees. I have a bat now in an old house I bought and do not kill critters. I am building a bat house to attach to a huge tree and hope my new pest will like that better then my attic.

    • I think you should write a children’s book about all your critters.

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