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• 00:28, 17 March 2023 Peter wood talk contribs created page H5 (Created page with "In Australia, H5 is a hazard level for treated lumber that indicates the level of protection against decay and insect attack. The H5 treatment is a heavy-duty treatment and is suitable for use in ground contact applications where the timber is exposed to severe decay and insect hazards, such as in marine environments. The H5 treatment process involves treating the lumber with a preservative that contains copper, azole fungicides, and a co-biocide. This treatment provide...") Tag: Visual edit