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Originally Posted by RMarkland
I wonder if this is correct? It seems for it to work the termites have already made it into your home, and through the walls into the interior of the home. Most likely the best way is to have the exterior barrier installed (chemical barrier). This should stop them prior to any damage being done to the interior. Have used Superior on two homes and happy with the service, and prices. Worth checking into. They do the lawns, shrubs, and pest control should you want all three. (I recommend all three)
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You are talking about two different types of termites. The most damaging type are subterranean termites, which is the type that the builder treats the new houses for to prevent infestation. They poison the soil under and around the house foundation, which usually will prevent termites from moving in for about 7 to 10 years, before needing an additional treatment. Spraying in or around the house aboveground will do nothing to kill or prevent subterranean termites. They live in the soil under your house and travel up and down through earth tunnels that they construct. You must poison the soil to kill them.
There is another type of termite that will fly into your house and live in the attic. But, unlike subterranean termites, you are more likely to see these termites before they do substantial damage.