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• 00:25, 17 March 2023 Peter wood talk contribs created page H3 (Created page with "In Australia, H3 is a hazard level for treated lumber that indicates the level of protection against decay and insect attack. The H3 treatment is a medium-duty treatment and is suitable for use in above-ground, exterior applications where the timber is exposed to the weather but not in contact with the ground. The H3 treatment process involves treating the lumber with a preservative that contains copper, azole fungicides, and a co-biocide. This treatment provides protec...") Tag: Visual edit