Ants Coming From the Crawl Space [Here’s what to do]

Sam McGilin

Sam McGilin

Hey there, I’m Sam McGilin, the person behind Pallentor. I have worked in the pest control industry for over 15 years. On this site, I share my knowledge so you can enjoy a pest-free home.

Important Disclosure: This post could contain affiliate links. This means that if you make a purchase through any of the links, we may receive a commission at no additional cost to you.

If you’ve been noticing more ants in your home lately, it’s essential to take the time to identify where they’re coming from to get rid of them.

In most cases, ants are coming from the crawl space. If that’s the case for you, this article will let you know a few things you can do to eliminate them.

How to get rid of ants in crawl space

1. Use an ant bomb in your crawl space

Ant bombs are an insecticide that releases a toxic gas that kills ants in minutes, if not instantly. If you experience severe ant infestation, you should consider using an ant bomb in your crawl space. Follow the instructions on using the ant bomb carefully, and ventilate the area well after using it. Ant bombs are available at most hardware stores.

2. Seal your house’s foundation

One way to prevent ants from getting into your home is to seal the foundation. Your house’s foundation is the part of the house that sits on the ground, and cracks are the most common way ants get into homes, so sealing them can help prevent an infestation. Try doing this by caulking any cracks that you see. You may use a special foundation sealant available at hardware stores, or you can use silicone caulk. This process is most effective when ants are most active in the spring or summer.

3. Call an exterminator

Exterminators can help to get rid of ants in your home. They are trained to identify the type of ant you have and to use the most effective methods for getting rid of them. The exterminators use baits and traps to kill ants and may also use insecticides. An exterminator may be your best option if you have a severe ant problem. You may search online or on the yellow pages to find an exterminator.

How do I find out where the ants are coming from?

Ants come most likely from the outdoors. Cracks in foundations or holes in walls are their common entry points. Once the ants are inside, they often build their nests in dark, moist areas like crawl spaces like your kitchen and bathroom.

To find out where ants are coming from, you can follow an ant trail back to its source. They usually line up single files when going to their food source, so it shouldn’t be too difficult to follow them. You can also put bait like sugar or honey to attract them and follow their trail back to their nest.

Does killing ants attract more?

Yes, killing ants can attract more. When you kill ants, they release a pheromone that attracts other ants. That is why killing the entire colony is essential, not just the few you see. Otherwise, you will end up with more ants in your home.

Can ants eat through the concrete foundation?

Yes, ants can eat through concrete foundations. They have strong jaws that bite through the concrete and have acid in their stomachs that can dissolve the concrete. Once they start to eat through the foundation, they will create a hole they can use to get into your home.


If you’ve been noticing more ants in your home lately, it’s necessary to take the time to identify where they’re coming from to be able to get rid of them. If ants are coming from the crawl space at your home, track their trail back to their nest. You may use an ant bomb in your crawl space, seal your house’s foundation, or call an exterminator and make sure to kill the entire colony.

Check out this article, if you have ants dropping from the ceiling.