Building characteristics that determine moisture in 105 Danish homes

Dampness in buildings is a risk factor for health issues and dampness increases the risk of indoor fungi contamination, which has likewise been identified as a risk factor for discomforts and illnesses. The aim of the present study is to elucidate building characteristics and occupancy behaviour that increase risk of indoor dampness and assess how well self-reported dampness correlates with measured values. Three methods of moisture assessment were undertaken in 105 houses and building characteristics and occupancy behaviour were determined. Around 25% of the homes had moisture problems. Geographical location, clothes drying indoors, lack of mechanical ventilation, high social status and spending more time indoors significantly increased the risk of indoor dampness. The variables associated with increased risk of dampness varied according to the method used to determine dampness. Measurements in air reflected short term variations in occupant behavior and measurement in material reflected building construction and longer term occupant habits.