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Coastal Contractor

March 2006
Termite Defenses for Slab-on-Grade Foundations - Making Sense of Air Barriers

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Soundings Termite Defenses for Slab-on-Grade Foundations Q: We've been told that it's a good idea to insulate the perimeter of slab-on-grade foundations, but we are concerned with termites in our area. What is the best way to detail the foundation to keep termites out? A: Exterior foam on any foundation presents a real problem wherever termites are active. Termites tunnel right through the foam, making it nearly impossible to inspect the perimeter of the building for their passageways into the home. A 1/32-inch gap is all a termite needs to squeeze through to get inside a home, which makes it

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