As temperatures rise in the spring and summer, so does carpenter ant activity. These large ants aren’t just a nuisance—they can cause serious structural damage to homes by tunneling through wood to build their nests. If left unchecked, an infestation can lead to costly repairs.
Carpenter ants are a major cause of wood damage in homes across Canada and the U.S. With milder winters and earlier springs becoming more common, their numbers are on the rise. That makes prevention and early detection more important than ever.
What Do Carpenter Ants Look Like?
Carpenter ants are among the largest ant species found in homes, measuring between 7 to 13 millimeters (about 1/4 to 1/2 inch) in length. They are typically black or reddish black with a smooth, rounded thorax, a narrow “waist,” and a shiny, segmented body. Unlike termites, carpenter ants do not eat wood—they chew through it to create nesting tunnels—and they are not pale in color.
Signs of a Carpenter Ant Infestation
Spotting the early signs can help you act before serious damage occurs. Be on the lookout for:
How to Prevent Carpenter Ants
Here are a few simple steps homeowners can take to reduce the risk of an infestation:
Why Acting Early Matters
Carpenter ants weaken wood by tunneling through it to build their nests, which can compromise structural supports like beams and walls. The longer they go unnoticed, the more extensive—and expensive—the damage becomes. Early intervention is key to limiting the impact and preventing future infestations. Keeping moisture under control and repairing rotting wood are essential steps in protecting your home.
