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Chris from Columbia Mo writes

Will perimeter trenching with fipronil be sufficient or do I need to treat the crawl space?

I have a 20x30 wood frame building (basically a big shed) on wood posts, on a slope so that crawl space underneath varies from 0 to 18". Dirt underneath. An untreated central 2x12 beam was partially buried in soil (don't ask me, I wasn't there!) and is infested with subterranean termites which have also started on the OSB flooring and two untreated interior posts. Beam is being replaced with treated wood which will not contact the ground. Posts below the floor are treated, including the 2 in the center and a dozen perimeter posts. I will cut off all contact between untreated wood and soil. Do I need to crawl under the building and pour solution around the central posts and/or ground surface, or will a perimeter treatment around the outside be sufficient? I only want to tear up and repair this floor once! Thanks.

Answer:

We would absolutely recommend doing the crawl space with Termidor by trenching around all of the piers/beams and treat just as you would around the outside.

Answer last updated on: 09/10/2013

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