Are Termites a Problem in Asheville, NC?

Why Asheville is termite country

Three things make the Asheville metro active termite country: hot, humid summers, heavy rain — about 41 inches a year — and mild winters that bottom out around an average of 57°F. Subterranean termites need moisture and warmth, and the soil here supplies both for most of the year. The metro's housing adds to it: about 37% of homes were built before 1980, and 19% before 1960, so there is a large stock of older framing, crawl spaces and settled foundations with the gaps and ground contact that termites use.

The colonies themselves are underground and out of sight. A single colony can hold tens of thousands of workers, foraging through the soil in search of wood, and the damage is done inside the timber — framing, subfloors, sill plates — where nobody looks until the wood sounds hollow or a floor starts to sag.

The signs to look for

Spring swarms after rain are the classic first sign: winged termites — swarmers — around windows and lights, or piles of discarded wings near a window frame. Mud tubes on the foundation, in the crawl space or along pipes are the second: pencil-width tunnels of soil that the termites build to travel between the soil and the wood. Wood that sounds hollow when tapped, paint that bubbles on wood, and doors or windows that stick for no clear reason are the later signs — the ones that mean the colony has been feeding for a while.

Check in spring, and any time after heavy rain. The gap between a clean report and a mud tube can be a single season of quiet feeding, which is why the annual inspection is the standard recommendation here regardless of the age of the home.

What to do about it

Start with an inspection. The inspector walks the foundation line and the crawl space, the sill plates and the subfloor, the garage and the porch framing, and the interior rooms where wood is exposed, looking for mud tubes, hollow wood and moisture. The inspection produces evidence: photographs of the tubes or the damaged wood, moisture readings where wood is suspect, and a written report.

Treatment follows the inspection. The two approaches used most in Asheville are a soil treatment that creates a treated zone around and under the structure, and bait monitoring stations placed in the soil around the property that workers carry back to the colony. Which one fits depends on the structure, the soil and the level of activity found. Monitoring is part of the work — stations are checked on a schedule, and the schedule is set out in the plan.

Prevention that matters

Keep wood off soil: no firewood stacked against the house, no mulch piled against the foundation, no buried form boards or scrap wood under the porch. Keep water away from the foundation: gutters clear, downspouts extended, grading that falls away from the wall. Keep the crawl space dry and ventilated. None of this replaces an inspection — a colony can be active under a well-kept house — but it removes the conditions that let a small colony become a large one.