[retiredguy123]

Just to clarify, you don't just "spray" for subterranean termites. They live underground in the soil and move up and down into your house slowly eating the wood and drywall materials. If you have these critters, they will never leave until you poison the soil under your house. The treatment process is expensive because you need to inject a poison chemical into the ground every 16 inches around your house, and in some locations, you may need to drill holes through the concrete sidewalk or garage floor because you need to create a continuous poisoned soil barrier around the house. Yes, you can inspect every year and wait until termites appear before treating the house. But, getting proper preventive treatment that is warranted for 8-10 years may give you peace of mind, especially when you want to sell your house. Termites can cause extensive damage to a house if they are not discovered early, and they are very good at hiding themselves from inexperienced people.