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Drywood Termites in Attic
We live in a 2 story, townhome in South Florida that was built about 6 years ago. I am up in the attic roughly twice a year and have never seen any signs of termites; but two weeks ago I noticed 4 different frass piles near the entry point to our attic along with some discarded wings on one of the beams. Tenting really isn't an option as we had a pest control company look in the other three units that make up our building and they do not show any sign of termites. I have been able to locate just one of the termite holes as the piles show up really well on the white insulation and that hole is in the roof sheathing which is the attic ceiling. But we can't seem to find the other three holes. My first question is if this wood had to be treated by Florida law with chemicals to repel termites then why do we have them? Did it wear off or did the builder use untreated wood? I have been reading as much as I can on drywood termites and have had a few different pest control companies come out to look in our attic to see if I could find a teratment consensus. They have all recommended different things. 1) Spot treat the affected areas and spray Bora-care in the entire attic 2) Spot treat the affected areas and spray Premise in the entire attic 3) Spray the entire area with Termidor and don't spot treat. Are all of these options viable? The termites swarmed at some point in the last 6 months as evidenced by discarded wings in the area but since it is October now I'm not sure they will swarm again until the late spring and summer. I am thinking maybe the best option is to personally spot treat where I can find the frass holes with termidor foam and then spray the rest of the wood in the affeted area with Boracare (1:1 ratio) and monitor monthly. If I see a new area then repeat the process as needed. Thanks in advance for any additional insight and all the information found in your Q/A database.
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Open Oct 11, 2024 - 10:01 AM
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Florida regulations do not require treatment of all wood for drywood termites, only a soil treatment for subterranean termites.
Spot treatments may or may not work, it depends on where the colonies are located. If you are seeing 4 different areas of infestation, then in all likely hood there are 4 separate termite colonies unless these areas are very close in proximity. Treating with Termidor foam and saturing the wood with liquid Termidor SC is the best option for corrective spot treatment action. Bora Care is primarily suited for prevention and not existing infestations.
Premise will not work to kill termites for an extended period of time as it is very short lived. Termidor SC will last much longer and BoraCare will last indefinitely. But as mentioned, BoraCare is for prevention only.
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