Carpenter ant control can be a little tricky,
Controlling Carpenter ants is really a 3 step approach. The first step is to create a layer of protection on the exterior of the structure. This can be done by applying Termidor, Premise, or some residual insecticide on the outside of the house. Using Termidor for example, you would apply a band 1 foot up and 1 foot out along the foundation as it meets the ground. In addition, treat around doors, windows and eaves of the house. Also treat all visible trails where carpenter ants travel. I suggest you treat for carpenter ants in the evening time, as late as possible, since Carpenter ants are nocturnal in nature. The second step in Carpenter ant control is treating the exterior off of the structure. Your inspection should tell you where Carpenter ants are traveling, and we would want to control Carpenter ants in this area. Examples would be Garbage areas, planting beds, trees, living or dead, overgrown vegetation and piles of wood. These areas would be a great area to apply the Advance Granular Carpenter Ant Bait or the Maxforce insect bait. Carpenter ants are highly attracted to piles of the bait as opposed to having to pick up a broadcast bait like a Fire Ant. Carpenter ants tend to trail along edges, such as sidewalks, fences and boarders of flower beds, and treatment with the same insecticide as on the structure can be used here. The final Carpenter ant control step is the treatment indoors. Indoor treatments for Carpenter ants can include the use of a spray, a bait, a foam or any combination of the 3. Once again, locating the hot spots of activity and applying the materials in those areas are important. Phantom aerosol or Phantom liquid are 2 good formulations with low odor and good residual protection. Putting these materials where the suspected nesting site is located is key to success. Also, if you know where there is a possible nesting site, the use of Premise Foam is a great tool to gain control of the Carpenter ant colony. Premise foam will fill up the carpenter ant gallery and nesting site and leave a good residual to prevent them from returning. Carpenter ant control products like baits are also effective indoors. Be sure to place the baits near the carpenter ant trails and activity. When the ants find the bait, they will recruit other workers to come help them take the bait back to the colony. Areas to do this might be in the attic, in a crawlspace or basement. In addition, if you can follow the ants back after they take the ant bait, once again you can hit them with the Premise foam or Phantom products.