Wingless carpenter ants are present year round. Winged ants collect in windows and doors in the spring or summer months. If wingless ants appear only seasonally, this indicates a nest outside of the home which can be followed to and treated with an approved insecticidal dust. If the ants are nesting in the home, look for moist, decaying wood. Remove or treat decayed wood with Impel Rods or borate solutions of Penetreat.
Insecticidal dusts approved for carpenter ants are the most effective.
Treat all of the nests within your house with the dusts. Remember to read all precautions and warnings. Fix moisture problems that exist around the home, such as leaking roofs, cracks in the caulking, gaps in the log joints, rotting sill logs, clogged gutters or leaking plumbing. Trim trees and shrubbery away from the house. Replace water-damaged or decayed wood.