Excess of moisture and adequate temperature level may cause mould growth in structures. How fast mould growth starts and to what level it may proceed depends on the duration and level of the conditions supporting biological growth. Numerical simulation models can predict the thermal and moisture performance of a structure under selected climate and moisture loads. Now a module to predict mould growth in wood based materials has been coupled with building structure simulatio n models.

This paper presents the moisture and thermal analysis with mould growth prediction for building envelope parts in selected cases. The objective is to show the risks for local mould growth during air exfiltration. Structural methods to enhance the drying efficiency and to avoid mould growth will also be studied.

• building: simulation of building processes
• fungi: growth and growth model
• risk analysis
• wood frame houses and walls, wood structure

1. Drying capabilities of wood frame walls with wood siding
2. Effect of exfiltration on the hygrothermal behaviour of a residential wall assembly: results from calculations and computer simulations
3. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part I -- field measurements
4. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part II --verification and numerical studies
5. Improving indoor climate and comfort with wooden structures
6. Improving the drying efficiency of timber frame walls in cold climates, by using exterior insulation
7. Integration of simplified drying tests and numerical simulation in moisture performance analysis of the building envelope
8. Measuring and modeling vapor boundary layer growth during transient diffusion heat and moisture transfer in cellulose insulation
9. Modeling heat, air and moisture transport through building materials and components
10. Moisture and bio-deterioration risk of building materials and structuresL?hdesm?ki
11. Moisture buffer value of building materials
12. Moisture Buffer Value of Materials in Buildings
13. Moisture performance of an airtight, vapor-permeable building envelope in a cold climate
14. Moisture transport coefficient of pine from gamma ray absorption measurements
15. Thermal and moisture performance of a sealed cold-roof system with a vapor-permeable underlay
16. Towards modelling of decay risk of wooden materials  

1. Drying capabilities of wood frame walls with wood siding
2. EIFS hygrothermal performance due to initial construction moisture as a function of air leakage, interior cavity insulation, and climate conditions
3. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part I -- field measurements
4. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part II --verification and numerical studies
5. Hygrothermal performance of a new light gauge steel-framed envelope system
6. Hygrothermal system-performance of a whole building
7. Improving indoor climate and comfort with wooden structures
8. Influence of material properties on the hygrothermal performance of a high-rise residential wall
9. Integrated hygrothermal performance of building envelopes and systems
10. Integration of simplified drying tests and numerical simulation in moisture performance analysis of the building envelope
11. Measurements and two-dimensional computer simulations of the hygrothermal performance of a wood frame wall
12. Measuring and modeling vapor boundary layer growth during transient diffusion heat and moisture transfer in cellulose insulation
13. Moisture transport in building envelopes using an approximate factorization solution method
14. Prediction of hygrothermal performance of building envelope parts coupled with indoor climate
15. Stochastic building envelope modeling -- the influence of material properties