Find and Eliminate Ants Nest

Photo by Chandler Cruttenden on Unsplash

House ants are a common pest, often nesting in walls, kitchens, and hidden crevices where they have access to food and moisture. For effective ant control, it is important to locate an ant nest inside the house instead of treating only the visible trails.

In the UK, the ant you’re most likely to find indoors is the black garden ant. It usually nests outside, in lawns, under paving and in brickwork, and comes in for food. Ants rarely nest inside the house, but they can set up in cavity walls and under floors.

Ants are social insects and live in colonies where they are all family. Every ant in the colony works for the good of the entire family. They are a well-organised machine, every ant has its role and job to contribute to the colony.

That being said, according to their nesting habits, ants’ nests can be divided into three major groups. First, nests in soil, second – nests in wood, and third – opportunistic nests. Here, we will talk about the ant nest types and where do ants nest in your home.

Signs of an ant nest indoors

Identifying an ant infestation early can help prevent a larger colony from forming. Look for these signs:

• Visible ant trails leading to a food or water source;
• Small piles of debris or discarded ant wings;
• Small heaps of fine soil or dust pushed out of gaps in walls, skirting boards or between paving slabs;
• Ant activity in moist areas, such as under sinks or near appliances;

Types of ant nests

Ant nests come in all shapes and sizes. The nests of ants provide shelter from their enemies, as well as the environment around them. Ants build nests so that they can safely raise their offspring. Also, nests provide protection for ants and their queens. Most ant colonies would die out very quickly without nests.

• Soil ants nests – These are the most common types of nests. Soil is easily available and many areas and it isn’t treated with pesticides or other chemicals harmful to the ants. Soil nests are also the most common for most ant species in the world, not just in the UK. You’ve probably seen them hundreds of times in the park. Anthills scattered on the ground between flower beds. Since ants build soil nests, they move some of it around thus making the soil ecosystem a service. They have a positive impact on plants and other animals who live near the ant nests.
• Wood nesting ants – You may have seen some of these ants. Some ant colonies make their nests in hollow parts of trees. Usually, the tree is rotting, or dying, has fungi, or there’s a lot of moisture. The ants do not eat wood, they nest in it.
• Opportunist ants’ nests – Opportunistic nesting ants are adaptable to various environments. They require a place with moisture, protection, and easy access to food. This means they are more likely to make a nest in your home. Any holes or cracks in the exterior of your house’s walls can become their home too. They will also get inside your home and steal your food.
• Simple ants’ nests – These nests often are unnoticeable by humans unless you find them by accident. Most often simple ants’ nests are built underneath logs, stones, or other large objects and have only one tunnel that leads to the nest.
• Complex ants’ nests – The counterpart of simple nests is the complex underground nests that comprise complex networks of interlocking tunnels. In the UK, the southern wood ant builds one of the biggest: a large mound of twigs and pine needles over an underground nest, usually in sunny woodland.

What does an ant nest look like?

In an ant nest, tunnels and chambers are interconnected, forming a complex underground structure. Depending on the ant species, soil type, and environmental conditions, these structures can vary greatly. What ant nests look like in general:

Most commonly, outdoor ant nests appear as small mounds (ant hill) of fine soil or sand with a central opening. Some nests are hidden under rocks, logs, or within cracks in pavements. Underground ant nests can be extensive, with multiple chambers and tunnels housing the colony.

Inside buildings, ants may nest in wall voids, under floors, or inside wooden structures, often remaining unseen except for worker ants foraging for food. Indoors, the clue is often a small heap of fine soil or dust pushed out of a crack, a gap in the skirting or a hole in the mortar.

If you’ve seen a couple of ants on your kitchen floor or counter, there are usually a lot more. Ants can enter your home through various entry points, including structural damage, a crack in the door or window, or an open door or window.

What does an ant hill look like?

An ant hill is a mound of fine soil that ants push up as they dig out their nest. In lawns, the bigger grassy mounds are usually the work of yellow meadow ants, which spend most of their lives underground. Black garden ants make smaller, looser heaps of soil, often between paving slabs or along the edge of a patio. Southern wood ants build the largest mounds, from twigs and pine needles, in woodland.

Where do ants build nests in houses?

Ants seek warm, hidden spaces to establish colonies. Common ants nesting locations include:

• Behind or under appliances. Large appliances such as dishwashers, refrigerators, laundry machines, ovens, dryers, etc. offer the ideal hiding place for ants.
• Behind walls and baseboards. Behind wallpapers is also a place where ants can build nests.
• Check the under-sink cabinet because ants may also be around the drain. Plus, that cabinet is rarely opened and is the perfect hiding place.
• In cracks and crevices behind kitchen cabinets and pantries.
• In damp wood, near leaky pipes or basements.
• In cavity walls. Black garden ants rarely nest indoors, but they can set up in cavity walls, usually getting in from a nest outside through gaps in the mortar or around pipes.
• Under floorboards can also be a nest, but only professional ant exterminators can find them and take care of such a nest.

These are the most common places ants nest indoors. Finding and eliminating an ants nest in the house is essential for effective ant pest control. By using ant bait stations, sealing entry points, and hiring professional exterminators, you can ensure long-term ant prevention.

Where do ants nest in the garden?

Outdoors, ants nest in soil wherever it’s warm and undisturbed. The most common places in a UK garden are:

• Lawns, where you’ll see small heaps of fine soil or grassy ant hills
• Under paving slabs and patios, with soil pushed up through the joints
• Flower beds, among plant roots, and in plant pots
• Compost bins
• Under stones, logs and garden ornaments

Most ants that come into your kitchen are black garden ants from a nest like this, just outside. If the nest is in your garden, see how to get rid of ants in the garden without harming your plants.

How to find an ants nest in the house?

When you spot ants in your home, you should follow them and see where they hide. There can be a couple of ants at once in your home, or the entire colony may be passing through your home. First, you should inspect the area inside your home that you spotted them in and find where their entry point is. If you live in a house with a garden, the nest is most likely there.

• Follow the ant trails – Ants follow pheromone trails to food sources. Observe their movement and trace them back to their nest location.
• Check for moisture and food sources – Ants are attracted to sweet foods, grease, and moisture. Inspect areas near sinks, pet food bowls, and garbage bins.
• Look for dead ants – if you spot a place with a bunch of dead ants, it’s almost certain that the nest is nearby.

Tracking the ants you see in your home is crucial, but it may not be as effective. If you follow them and they disappear underneath the floorboards, for example, you will never know where exactly they are going. Severe infestations require pest control for ants. Our ant control technicians find where the ants are most active and treat those areas with professional ant gel that worker ants carry back to the nest.

How to get rid of ants’ nest in the house?

Getting rid of an ant nest in your house requires locating the nest, using effective treatments, and taking preventative measures. Here are some steps and methods to eliminate ant nest:

• Follow ant trails to find their entry points and nesting areas;
• Place sugar-based or protein-based ant baits near the trails;
• Use HSE-authorised ant powders, gels or sprays around entry points, and follow the label;
• Store food in airtight containers and wipe away food crumbs and spills immediately;

If you’re only seeing a couple of ants here and there, and not an entire colony, you can use some baits to test and check which would be the most effective pest control method to use. In the area where you see the ants (most commonly in the kitchen or bathroom) in two corners put peanut butter and honey. Based on which treat they attack, this would be the type of ant bait to use against them. If they are drawn to the honey, you should use sugar-based baits to get rid of them. But if they are drawn to peanut butter, use protein-based ones.

Does boiling water get rid of ants’ nests?

Yes, pouring boiling water into an ant nest can kill many ants, including the queen if the water reaches deep enough. However, it is not always a permanent solution, as:

• The water may not reach all tunnels, allowing surviving ants to rebuild.
• Some colonies have multiple queens, meaning the nest can recover.
• Deep nests under paving or in walls are hard to reach, so it can take several goes. Boiling water also kills grass and plants, so keep it off lawns and flower beds.

Boiling water can be an effective tool for controlling ant infestations, but it is often more effective when combined with other methods, such as using ant baits or sealing entry points, in order to eradicate the colony completely.

How to stop ants nesting in plant pots?

Do you see ants going into your potted plants? They can be attracted to some plants’ honeydew or the moisture in the soil. Also, they can chase aphids, mealybugs, or scales that hide in your potted plants. To stop ants nesting in plant pots, you can try any or a combination of the following:

• Some people put citrus peel or juice around pots. It may put ants off for a while, but it won’t remove a nest.
• Ground cinnamon around the pot works the same way: a short-term deterrent, not a cure.
• Diatomaceous earth is also effective. Do not sprinkle it on the soil, only around the pot.
• An HSE-authorised ant bait or gel placed next to the pot, used as the label says. Don’t spray the plant or its soil.

You can also apply these methods to your home. Sprinkle these products around doors, windows, and corners of the rooms where you see ants most often.

Read more: Where Do Insects Go in the Winter

How many ants are in a nest?

The number of ants in a nest depends on their species and the time of the year. When it comes time for reproduction, some flying ants will leave the nest looking for mates. However, on average an ants’ nest can have from a hundred to thousands of workers, males, and ant queens.

In the UK, a black garden ant colony usually has 4,000 to 7,000 workers and can grow to about 15,000. A new colony starts much smaller: a single queen seals herself into a chamber and raises her first few workers on her own, then the colony grows each year.

What happens if you disturb an ant nest?

Disturbing an ant nest can trigger an immediate defensive response from the colony. Worker ants may swarm out aggressively to protect their nest, and red ants will sting, while wood ants bite and spray formic acid. If the disturbance is severe, the colony may relocate to a new site.

What if ants keep appearing?

When you’ve taken some steps and measures to get rid of the ants‘ nest in your home or cut off their access, but they keep re-appearing, there’s only one thing left to do. You should get help from professional pest controllers.

Final thoughts

Locating ant nests is crucial for preventing infestations. By identifying signs of ant activity early and understanding the behaviours of various ant species, you can take effective action. Professional pest control services offer the expertise and solutions needed to tackle persistent or widespread infestations, ensuring your home remains safe and free from these unwanted pests.