The most effective prevention for Drywood termites can be "built-in" to a home during its construction phase. Pressure-treated lumber should be installed wherever possible. Further, all untreated wood can be sprayed with borate solutions. Once the construction phase is completed, it is impossible to treat all wood in a completed house with residual chemicals. In those cases, fumigation (or "tenting") has been the most effective method, which insures complete eradication of all Drywood termites from a structure.
Fumigation involves surrounding the structure with a gas-tight tarp, releasing the gas inside the seal, and filling the structure with gas for a pre-set exposure time. Before fumigation, the homeowner must remove all plants and animals from the house, remove or place food items inside special protective bags, and insure that there is sufficient tarp clearance between sensitive landscaping and exterior walls. The fumigation company may monitor gas concentration during the fumigation to insure that a sufficient dose is maintained.