The wood-moisture interaction is one of the most natural phenomena. However, it is not yet
sufficiently understood in its complexity. In hygroscopic range, the moisture in wood can be
transported in two forms: as water vapour via the pore system and bound water via the cell
walls. The two transport mechanisms are governed by different driving potentials. In real
scenarios they can be of opposite direction, especially under non-isothermal conditions. The
transport of the two forms of water were only several times determined solely and there is a lack
of accurate data. The aim of the project is, therefore, to determine the sole steady-state water
vapour and bound water permeability and the sorption term over the hygroscopic range. For the
experiments, a novel experimental setup will be developed and already present wind tunnel will
be modified. Results of the project will provide accurate data and can help proving some of the
theoretical assumptions in the field. It can also help to improve numerical models and thus
using the wood more efficiently or in entirely novel applications.