Locating the colony is necessary for best results, and can be accomplished by following foraging ants returning to the nest with food. Once the location of the nest is discovered, the pest problem can be removed with a dust insecticide treatment sprayed into the wall voids with a hand duster and tubes. After eliminating the colony, be sure to replace any damage wood.
To prevent carpenter ant infestations or re-infestations ensure that there are no plants or tree branches touching your home. Firewood should also be stored away from the house and on an elevated platform not touching the ground. Limit the use of mulch around the home as well, as higher levels of moisture can attract many types of pests.