How do Argentine ants typically enter buildings?

Argentine ants are known for their ability to exploit small entry points when seeking shelter or food sources. One of the most common ways they gain access to buildings is through cracks in the slab or foundation. These ants are small and can fit through very tiny openings, allowing them to enter structures undetected.

When buildings have cracks or gaps in the concrete slab or at the foundation level, it provides an ideal pathway for Argentine ants. Once inside, they can establish colonies and become a significant pest issue. This behavior highlights the importance of maintaining buildings to minimize entry points, making it more challenging for these pests to invade.

Although open windows, doors, and ventilation systems can also serve as entry points for various pests, the specific characteristic of Argentine ants to thrive in colony structures often directs them toward less obvious, smaller openings like cracks in the foundation.