The methodology of risk analysis and assessment is reviewed and applied to study the reliability of condensation control measures in lightweight building envelopes. It is generally recognized that airtight construction is an essential part of condensation control. Nowadays, different air barrier systems are developed and documented to prevent air leakage and moisture accumulation in the envelope. But does this mean that the condensation risk is sufficiently minimized and that the protective system is reliable? Considering the high occurrence of human error in the building process, the possibility of air barrier defects during the service life of a building envelope may be high. To define the reliability of the condensation control system, the consequences of air barrier failure are quantified using a two-dimensional numerical control volume model for the calculation of combined heat, air, and vapor transfer in multilayered building envelope parts. A set of failure modes and design calculation conditions is defined for an exemplary wood frame insulated roof, and a failure effect analysis is performed in order to predict the condensation risk as a result of air barrier defects. The effectiveness of redundant design measures to improve the reliability of the condensation control system is studied

• condensation and evaporation : risk analysis
• moisture damages and problems for buildings : moisture problem,
• risk analysis

1. Application of a new type of air and vapor retarder in a self-drying sloped roof with a cathedral ceiling
2. Benchmark experiments for moisture transfer modelling in air and porous materials
3. CFD modelling of HAM transport in buildings: The importance of local indoor climate
4. Coupled simulation of heat and moisture transport in air and porous materials for the assessment of moisture related damage
5. Evaluation of the different definitions of the convective mass transfer coefficient for water evaporation into air
6. Experimental validation and sensitivity analysis of a coupled BES-HAM model
7. Heat and moisture response of vented and compact cathedral ceilings: a test house evaluation
8. Impact of whole-building hygrothermal modelling on the assessment of indoor climate in a library building
9. Inquiry on HAMCAT codes
10. Modelling indoor air and hygrothermal wall interaction in building simulation: Comparison between CFD and a well-mixed zonal model
11. On coupling 1D non-isothermal heat and mass transfer in porous materials with a multizone building energy simulation model
12. On the applicability of the heat and mass transfer analogy in indoor air flows
13. Reliable control of interstitial condensation in lightweight roof systems, calculation and assessment methods
14. Sensitivity analysis of CFD coupled non-isothermal heat and moisture modelling  

1. A comparison of different techniques to quantify moisture content profiles in porous building materials
2. Application of a new type of air and vapor retarder in a self-drying sloped roof with a cathedral ceiling
3. Building envelopes in a holistic perspective
4. Determination of the liquid water diffusivity from transient moisture transfer experiments
5. Evaluating the thermal performance of active envelopes
6. Fungal defacement in buildings: a performance related approach
7. Heat and moisture response of vented and compact cathedral ceilings: a test house evaluation
8. Heat, air and moisture transfer in insulated envelope parts. Final Report, Volume 1, Modelling
9. Heat-air-moisture design of masonry cavity walls: theoretical and experimental results and practice
10. Hygric properties of a new humidity controlled vapor retarder
11. IEA Annex 14: Condensation and Energy
12. Inquiry on HAMCAT codes
13. Interstitial condensation due to air leakage: a sensitivity analysis
14. Microscopic analysis of imbibition processes in oolitic limestone
15. Modeling. Final Report
16. Performance prediction for masonry walls with EIFS using calculation procedures and laboratory testing
17. Performance-based development of a thermally insulated pitched roof system
18. Pitched roofs, heat-air-moisture transport in tiled and slated roofs with the thermal insulation at rafter level
19. Simulating non-isothermal water vapour transfer: an experimental validation on multi-layered building components
20. The influence of soil moisture in the unsaturated zone on the heat loss from buildings via the ground