Answer
Apr 25, 2013 - 09:03 AM
I always recommend treating where the termites are active, regardless of where they came from. If the termites came from the soil, yet are active inside the wall, simply treating the soil without knowing if you actually contacted the termites (no mud shelter tubes visible etc), is called "spraying in the blind". In other words, you really don't know if you contacted the termites. Foaming the wall with termiticide where the termites are active is a much better treatment method, and practically ensures that the termites are "touched" or contact the chemical.
When foaming an exterior wall, it is always best to do it from the inside and through the sheetrock, paneling etc. Apply the foam directly into the wall void and close to the bottom sill plate. Try to saturate the sill plate or bottom wall stud and then up the wall 12" or so.
If the termite company actually found mud shelter tubes and removed them, trenched and treated the soil, then that is a proper treatment. If they did not find mud shelter tubes, earth wood contact on siding, etc, then absolutely treat the walls.
A great self treatment is to use Termidor Foam. Make a small hole with a nail above the baseboard and inject the foam into each wall cavity between each set of studs on the wall for 10 - 15 seconds. Then patch the wall to your satisfaction.
Here is the link to Termidor Foam - http://www.epestsupply.com/product/TE...
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