Tim Uhler is making a mistake in saying that it's okay for borate-treated wood to get wet during normal construction (Q&A, 1/06).

Universal Forest Products, a distributor of Osmose's Advance Guard, has the following handling instructions on its Web site: "Borate-treated products must be continuously protected from liquid water, and they should never be used in contact with the ground." I think rain qualifies as liquid water, and houses are still built outdoors.

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