ABSTRACT
The service life of a wooden cladding depends on its moisture and temperature conditions. In Norway such claddings are normally ventilated, i.e. there is an air gap between the cladding and the other parts of the wall assembly. This paper presents results from measurements on wooden claddings with different air gap openings at the field station of SINTEF Byggforsk and NTNU (Norwegian University of Science and Technology). Calculations with a numerical model in WUFI are compared with measurement results from the field station. Two extreme design conditions, with no ventilation (NV) and full ventilation (FV), are measured and modeled. The numerical model is used for four weather stations in Norway in order to demonstrate how climate zone differentiation of wooden cladding design can be applied.
