Locating Ants Entry Point Into Your Home

Ants Inside House

If you've noticed ants inside your home, your first reaction may be disgust or annoyance. You'll also probably experience some confusion – how did they get inside? Ants are very determined to gain access to anything inside your home that attracts them, such as food or moisture, and will use even the smallest openings to get in. Here, Horizon Pest Control explains the top four ways ants might gain entry to your home.

Seams in the Walls

To ensure proper ventilation, home construction allows an air exchange between the inside and outside of the house. This means that there are small gaps along the seams and other parts of the walls that are just big enough for ants to crawl through. These seams occur where a wall meets the floor, ceiling or another wall at a corner. Seams are also created when holes have been made in the wall to install windows, doors, outlets, vents or other features. Utility lines for services such as cable, water, electricity or natural gas also create small points of entry. Additionally, if your walls were made with older building materials, like plaster, cracks can develop over time. These cracks can grow and provide large openings for ants to use to access the interior of your home as well. Make sure to have those cracks sealed as soon as you notice them to keep ants out.


Windows are a popular place for ants to congregate because their frames can rot if they are made from wood and moisture often collects on the sill. Ants are attracted to these conditions, then work their way inside. Obviously, open windows and screens will grant access to ants. But, as mentioned above, the seam around the window where it meets the wall may also be large enough for these pests to enter. Caulk can be used to seal up these gaps and prevent entry.


The same seam issue around window frames also affects doors. Check the seal underneath the door to see if there is a gap big enough for ants to crawl through. This may also occur at the top and on the sides. A door sweep on the bottom of the door can limit entry and even help you save on heating costs. Make sure to examine doors that you don’t use often, as they can deteriorate and develop cracks that you may not notice. These cracks allow ants to easily enter your house, but repairs can help maintain a barrier.

Gaps in the Foundation

Small spaces in the foundation of your house allow ants to sneak in underneath your home. If your foundation isn’t made from concrete blocks, ants may also work to burrow in and break through small spaces to gain access. Once inside, they are able to travel underneath your floor, which makes it very difficult to find where they are coming from. The subflooring offers space for the ants to travel around undetected to any part of the house. Sealing gaps and cracks in the foundation can help eliminate these points of entry and keep ants away.

Stop the Stream of Ants

While you can take precautions to minimize ant entry, it's almost impossible to shut down every potential route into your home. If you've noticed ants swarming around windows or near your foundation, contact Horizon Pest Control today. Our ant control services can help eliminate these pests and keep your home free from insect intruders. To receive a free quote for service in New Jersey or New York, call 201-806-1463.

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