Composite panels, such as oriented strand board (OSB), are widely used in house construction in North America. These structural panels are normally made of non-durable wood species and are susceptible to moulds and decay when exposed to wet conditions. Building envelope failures due to moulds, decay or poor construction practices can negatively impact the image of wood. To ensure durability of composite panels, the most important consideration is the use of mould- and decay-resistant wood species to prevent fungal attack. Using low environmental impact technology to improve the durability of composite products could have market-related advantages over using chemical protection products. This research aimed to explore various potential biological treatments to protect composite panels from biodegradation, and to increase durability of panels for better resistance to mould and decay infection in service.

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