Termite Control:

When termites cross masonry, concrete etc. to reach the food source, the nucleus of the colony remain in the soil. Workers travel between the food source and the soil to bring food. They usually return to the soil that at least once in every 24 hours for moisture, otherwise the workers would die.
The basic principle involved in control of subterranean termite is to break the contact between their food source and the colony. This is best done by creating a chemical barrier in the soil at the base of foundation of buildings.

Methods for Termite control...

Pre-Construction Termite Treatment

Post-Construction Termite Treatment