Presentation of the final report Annex XIV with special emphasis on the case studies.

The paper summarises the IEA, Executive Committee on Energy Conservation in Buildings and Community Systems, Annex 14 work on Condensation and Energy, a joint research effort of the Federal Republic of Germany, Italy, the United Kingdom, the Netherlands and Belgium, finished end of march 1990. First the complex relations between mould+ surface condensation, the outside climate, the building fabric, inhabitants behaviour and energy conservation are discussed. Then follows a short overview of the Annex achievements with mayor emphasis on the guidelines and practice results. These are illustrated by the Zolder case, an example of a problem estate. The causes of the complaints found there, seem typical: social houses with a restricted living space, intensively used, ruinous thermal quality and poor ventilation possibilities. On 3 houses, different curing measures could be evaluated in a systematic way: loft space insulation, inside insulation, double glazing, outside insulation, natural ventilation, demand controlled ventilation. This paper describes the results for 1 of the houses.