Inspect

• Termites will enter wooden structures through cracks and voids in the wood. Most of the time, the wood needs to be touching the ground or saturated with water, but not always. If you suspect termites, poke around on the wood with a screwdriver. If you find that the wood has tunnels inside its core and you have found bugs that look like termites, then you may have termites. Next, you should check to see if the problem is localized or widespread. Inspect other areas of your home exterior, such as window sills, door sills, foundation sills and any other wood materials that may be in contact with the dirt.
  
  

Local Infestation

• If the termites are locally infested, you can treat them with a spray-on application of termite killer. The chemicals come in powder and liquid form and are injected through holes you drill in the wood. The point is to open up the wood in a small area to get into the termite colonies. Use a 3/8- or 1/2-inch drill bit to drill into the wood. Try not to damage the wood any more than necessary. When inserting any powdered form of termite poison, be careful not to clog the opening, which would prevent any further application.
  
  

Widespread Infestation

• Larger infestations should be treated only by a professional. It will be necessary to tarp the entire area and fumigate with strong poisons that only a licensed pest controller can purchase. If you find termites spread over more than 20 square feet, you should get professional help. Although you can do it yourself using the safer chemicals, it will require you to dedicate a a great deal of time and effort to the treatment.