People spend the majority of their time inside buildings. In fact, we spend up to 90% of our time living, working, learning and playing indoors. One major problem in European buildings is damp, which can lead to the growth of mould, and a rise in associated illnesses such as asthma. Around 16% of Europeans currently live in damp or mouldy dwellings, and this poses a major challenge for the health and well-being of society.