To avoid wood greying, dimensional variations, and degradation by biological agents wood is protected with preservation products and coatings when used outdoors. For some wood species used for cladding, a treatment with a preservation product is required, and is frequently additionally protected with a coating. In this study, Mäder Group developed a new UV-curable coating for outdoors applications. The coating was applied on treated and untreated spruce and resistance against Reticulitermes termites, and longhorn beetle Hylotrupes bajulus was determined. In order to mimic outdoor exposure, two types of artificial ageing were applied to coated wood (immersion and artificial weathering) before exposure to the insects. The results demonstrated that all aged coated samples were not attacked by the insects.

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