Current research in building moisture control.

Evidence of the importance of air infiltration in moisture control in building structures has been steadily accumulating. A general model of moisture behaviour in structures has been built up including for the effects of cavity air leakage, for the hygroscopic behaviour of timber, for the effects of condensation and various geometric factors. Current projects include sorption properties of New Zealand building materials, combined heat/moisture transfer in cavities, ground evaporation, field studies on roof space condensation problems and laboratory tests on moisture behaviour and related heat flow behaviour in several roof types.