ABSTRACT
The weathering of wooden surfaces is normally caused by mould growth, lignin deterioration and leaching extractives. For well insulated buildings, the effect of the interior climate on the outer surface is small and sometimes negligible. This paper describes simple models for surface temperature and moisture on a wooden façade for use with mould growth models. The models are driven by exterior climate data combined with ray-tracing to account for the micro scale variations of the solar irradiance on the wall. The models are applied to a façade made of untreated aspen and the results are compared to measurements of temperature and moisture in the façade.
