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.