The importance of IAQ to Finland's society and economy has led to the realisation that nationally planned and coordinated activities are necessary to achieve reliable results. For 20 years the Finnish government has had a national policy to coordinate different governmental, local and private policies to improve IAQ in homes, schools, offices, public places etc. This program has been very successful although there are still many buildings with damp, mould and other similar problems and the quality of construction falls below that required.