Real test-bed studies at the ETH House of Natural Resources – wood surface protection for outdoor applications
DOI:
https://doi.org/10.3989/id.55202Keywords:
wood surface modification, façade, UV-stability, weathering, living lab, ETH House of Natural Resources (ETH HoNR)Abstract
The increasing demand for sustainable construction materials used in urban areas calls for novel wood protective coatings, which retain the natural appearance of wood while minimizing maintenance intervals. This work reports on three different wood surface modification processes and evaluates their protective effect against weathering after installation at a testing façade of the ETH House of Natural Resources (HoNR), a recently opened living lab located in Zürich, Switzerland. We monitored the discoloration upon outdoor exposure of subsequently improved generations of thin metal oxide coatings developed in our lab. We target almost transparent and durable coatings with water repellent properties to diminish discoloration due to UV light and biological attack. This should lead to wooden facades with increased reliability and thereby boost an enhanced utilization of the renewable and CO2 storing resource wood.
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