Carpenter Ants vs Termites: How to Tell

What each one does to wood

Termites eat wood. Subterranean termites live in the soil, reach wood through mud tubes, and feed out of sight inside framing and subfloors. The damage is inside the timber — the surface looks sound while the inside is gone.

Carpenter ants do not eat wood; they hollow it out for nesting. They nest in moisture-damaged wood — window frames, porch posts, bath-trap wood, deck edges — and they leave sawdust-like piles of wood shavings where they work. The wood they leave behind is clean and smooth inside the gallery, and it sounds hollow when tapped.

The signs, side by side

Mud tubes on the foundation, in the crawl space or along pipes mean termites. Carpenter ants do not build mud tubes. Sawdust piles under window frames or porch posts mean carpenter ants. Termites do not leave sawdust. Winged insects indoors in spring: termite swarmers have a straight waist and straight antennae, with two pairs of wings the same size; flying carpenter ants have a narrow waist and bent antennae, with the front wings larger than the back wings. Hollow wood can mean either — the tap test tells you the wood is damaged, not which insect did it.

Why the difference matters

The treatments are different. Termite work is a soil treatment or bait stations matched to the structure, with monitoring on a schedule. Carpenter ant work is bait carried back to the colony, direct treatment of the nests found in voids or timber, and correction of the moisture problem that made the wood attractive. Treat a carpenter ant problem like a termite problem, or the other way round, and the colony survives — and the season is lost.

The inspection settles it. The provider taps the wood, looks for the tubes and the shavings, checks the moisture, and identifies the insect before anything is planned. If you are not sure which one you have, do not guess — call, and let the inspection decide.

The moisture connection

Both insects follow moisture, and Asheville supplies plenty of it — about 41 inches of rain a year, and the damp that collects in crawl spaces, at the foundation and in the wood around leaking sills and buried form boards. A leaking sill, a gutter that dumps water at the foundation, a crawl space that stays damp: each one makes wood attractive to both species. The moisture problem is corrected alongside the treatment, or the insects come back to the same timber.