Will we have to drill holes every 10-12", or basically every square foot, to treat, or will drilling around the perimeter suffice
If termites are coming up in the middle of a slab through a crack, then you should do two things. One, you should always treat the exterior of a structure if you want to prevent future infestation by doing an exterior treatment as outlined in our How To Do A Termite Treatment article. If there are termites in the structure or under the slab then the building probably has not been treated in a while. Secondly, if you know where the termites are you should always treat them directly in addition to treating the exterior. In your situation where they are coming through a crack, you should drill alternating holes using a hammer drill 2 to 3 inches off of the crack on either side of the crack every 10 to 12 inches apart for the length of the crack, and inject a termiticide through those holes at a rate of 4 gallons per 10 lineal feet.
Answer last updated on: 03/22/2011