Termidor SC is a great exterior product for ants including carpenter ants. It will last for six months as a topical outdoor application but can take some time to fully eradicate as the ants carry it and transfer to other colony members. You will be able to get rid of Carpenter Ants more effectively if you can locate where they are coming from. They are the most active at night between 10AM-4AM. We do recommend treating with the Maxforce FC Carpenter Ant Bait and the Advance Carpenter Ant Bait. These baits will be extremely effective. The granules should be applied when dry outside and you are not expecting any rainfall within 24 hours of application. The bait gel can be applied directly to indoor cracks and crevices once every two weeks.
To treat a concrete slab, you will come 2-3 inches off the wall and drill holes 10-12 inches apart using an 18in-24in drill bit. Using a 5 gallon bucket, mix 4 gallons of mixed solution (.8 fl oz of Termidor SC per gallon of water) and pour the 4 gallons of mixed solution in the drilled holes for 10 linear feet. Usually each hole will take approx 1/2 gallon of solution. It is easier to use a funnel to pour the solution into the holes. If there is a crawl space at any point, dig a 6x6 inch deep trench around any post or cinder blocks in the crawlspace and pour the Termidor SC mixture into that soil.
Yes, you should drill a hole 2" from the foundation wall (1/2" in diameter/18" deep) every 10-12" apart. You will be dispursing the same amount of finished soultion in the drilled holes as you will the trench around the structure. Termidor SC will be mixed at 3.2 oz per 4 gallons of water per 10 lineal feet (in trench or drilled holes). Please let us know if you need anything else.