The malaise is associated with but not necessary caused by the physical condition of the building. The classic sick building has large open spaces, tinted glazed windows and air conditioning. It is not known what are the causes of sick buildings but factors that contribute are air and surface temperatures, the level of humidity, air movement especially in the local work area, air purity and amount of fresh air, the organization of the space, the colour schemes and lighting. Buildings with monotonous environments are more likely to be sick. Public sector buildings are more effected than private sector buildings. The attitude of people is a contributing factor. If the general feel of the building is good it is more likely to not be sick.
Schools in the UK have been forced to close because of vapour from cavity-wall insulation; a mysterious form of rot has caused the disintegration of carpets; people in several communities in the USA have been forced to move out of their homes because they become ill when living in them.