The key to using this product is finding the void in the wood where the nest is located. I probably drilled 40 or so holes, using a 1/4 inch drill bit, both into the plate board and the floor joists below the plate board, along the back wall of my house, in my effort to nail down the location of the Drywood Termite Nest, which I believe I did. The nest appears to be in two or 3 near by locations, perhaps 6-8" apart. Where the wood is solid, the drilling is tough going. You feel the void where the nest is located as resistance to the drill disappears after 2-3 inches. I drilled every 4'' along about 10' feet of the plate board. Ditto for the floor joists. Probably 10 or 12 of the holes penetrated the nest. The Foam flowed steadily into those holes. I am now awaiting results.
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