Forintek Canada Corp. will assess the performance of hardwood and softwood treated blocks exposed to decay fungi. An evaluation of the potential of wood treated with copper thiocyanate, zinc thiocyanate, copper salicylate, zinc salicylate and zinc methylsiliconate for use in moderate or severe decay hazard conditions will be made. The work will be performed under Canadian Forestry Service contract 3-65-57-020.
The susceptibility of non-veneered composite panel products to decay is greater than solid timber when exposed to high moisture contents and severe decay hazard conditions. Preservative chemicals incorporated into these products at various stages of manufacture generally improve the decay resistance of these materials but certain strength properties, especially internal bond, are adversely affected. It appears from the literature survey that treatment of the composite panel products with ACA type preservative system could provide adequate protection with acceptable loss in the strength properties of the panels.