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Q&A Home

Kate writes,

I have a 100 year old home with log joists in my crawl space and basement that are about 6" to 8" in diameter....

Will spraying Bora-Care as termite (and powder post beetle) treatment be adequate? Or would you recommend drilling and injecting Bora-Care into the logs? If so, at what spacing? How much in each injection? Also, I have evidence of both termite and powder post beetle damage (inactive). Would you recommend spraying the entire crawl space and basement ceilings, rather than just around the edge as recommended for termites?


You do not need to drill holes into any beams, but you should treat the entire crawl space.  Most people end up doing that for adequate protection because termites and beetles can travel inside the wood away from the perimeter.  One application of Bora-Care is usually enough, but if you have 8" beams, then you would probably want to do a second application only on the larger beams since anything over 8" thick requires two treatments.  Typically one gallon of Bora-Care will treat up to 500 square feet of surface sub-floor in the crawl space mixing it 1:1 (1 gallon of Bora-Care with 1 gallon of water).

Answer last updated on: 02/14/2011

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