During the last years we have seen an increasing number of published cases with serious moisture problems in new buildings. The problem has in many cases been that materials and constructions in the building phase have not been kept clean and dry. There has been a tendency to tell that this has to be accepted as we always have built in wet weather. And this may be true, but nevertheless it is not acceptable. There is more than one reason to erect buildings in another way. One is that modern well-insulated and airtight structures do not allow rainwater to dry out before damages occur. In a less insulated structure the drying out is faster. Another reason is that people get more and more sensitive for a bad indoor environment, which means that microbiological or chemical decay may contribute to health problems. It is therefore important not to get moisture into the construction. There is a need for systematic information to all the parties involved in the building process how to ensure a clean and moisture safe building. Experience from moisture damage investigations as (Hilling 1998) and (Samuelson 1978) is not always used. There is a need for shorte r information.

• maintenance, inspection, and diagnose

1. Hygrothermal performance of attics
2. Microbiological growth on building materials - critical moisture levels. State of the art
3. Modeling heat and moisture transfer through fibrous insulation with phase change and mobile condensates
4. Prevention of moisture and mould damages in buildings  

1. 3D room models for moisture balance calculations
2. Use of FMEA - failure modes effects analysis on moisture problems in buildings
3. Use of statistics for prediction of risk for condensation in a wall construction cold walls radiation technique: the case of quality of air