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.
Termidor SC cannot be applied indoors or for flea control. We do carry an Indoor Flea Kit that will be great for this application. You will vacuum daily (discarding the bag or emptying the canister after each use) and spray once every two weeks. It is highly recommended to make a minimum of two applications indoors but may require additional applications depending on the level of fleas.
If you spray a good barrier around the foundation of the home with Termidor it will technically control any species of ant that would crawl across it. You can treat 1 foot up on the side of the home, and 1 foot out on the ground, as well as around any other entry point for the ants like windows, doors and where pipes or wires enter the home. The ants will walk across the Termidor, pick it up unknowingly, and take it back to the nest to eliminate them at the source. Please see our Fire Ant Treatment Guide for recommendations on how best to treat for this pest.