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Integrated approaches for moisture analysis

Karagiozis, A.
1999
DURABILITY AND DISASTER MITIGATION IN WOOD FRAME HOUSING November 1-2, Monona Terrace Convention Center, Madison, Wisconsin, USA

Karagiozis, A., (1999), "Integrated approaches for moisture analysis", DURABILITY AND DISASTER MITIGATION IN WOOD FRAME HOUSING November 1-2, Monona Terrace Convention Center, Madison, Wisconsin, USA.
Abstract:
Many recent, moisture-originated failures in low-rise residential buildings have brought about pressure to change construction codes in North America and Europe. However, solutions to moisture-induced problems may be difficult when several interacting mechanisms of moisture transport are present. Recently, a new approach to building envelope durability assessment was introduced in North America. The approach employs moisture engineering, which requires system information about the wall systems as constructed or with aging characteristics coupled with advanced modeling to predict the long-term performances of building envelope systems. This permits the comparison and ranking of individual building envelope systems with respect to total hygrothermal performance. This approach goes one step further, by incorporating the individual hygrothermal performances of all walls, roof, floor, and mechanical systems. The full-house hygrother-mal performance of a wood frame wall system is examined for a mild climate. The hour-by-hour drying potential of each system was then numerically analyzed using real weather conditions in Knoxville, Tennessee. Results clearly demonstrate the drying potential for the wall system in that climate. Furthermore, the selected exterior thermal insulation and interior vapor control strategies in this study clearly show the critical behavior of the full house with respect to drying ini-tial construction moisture. Results show the importance of the total hygrothermal behavior of the whole house to the coupling between the various envelope parts, interior and exterior environments and HVAC system. This presentation elaborates on the required inputs for inte-grated approach in moisture analysis. From this analysis, moisture control strategies can be identified for the hygrothermal performance of the entire house.
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Author Information and Other Publications Notes
Karagiozis, A.
Achilles N. Karagiozis, Oak Ridge National Laboratory, Building Technology Center, Oak Ridge
  1. A North American research approach to moisture design by modeling
  2. Advanced hygrothermal modeling of building materials using MOISTURE-EXPERT 1.0
  3. Advanced hygrothermal models and design models
  4. An educational hygrothermal model: WUFI-ORNL/IBP
  5. Applied moisture engineering
  6. Barrier EIFS clad walls: Results from a moisture engineering study
  7. Boundary element analysis of uncoupled quasi-static hygrothermoelasticity for two-dimensional composite walls
  8. Building enclosure hygrothermal performance study phase I
  9. Drying capabilities of wood frame walls with wood siding
  10. EIFS hygrothermal performance due to initial construction moisture as a function of air leakage, interior cavity insulation, and climate conditions
  11. Hygrothermal system-performance of a whole building
  12. Importance of moisture control in building performance
  13. Influence of material properties on the hygrothermal performance of a high-rise residential wall
  14. Integrated hygrothermal performance of building envelopes and systems
  15. Measurements and two-dimensional computer simulations of the hygrothermal performance of a wood frame wall
  16. Moisture transport in building envelopes using an approximate factorization solution method
  17. Position paper on material characterization and HAM model benchmarking
  18. Simulation of indoor temperature and humidity conditions including hygrothermal interactions with the building envelope
  19. Wind-driven rain distributions on two buildings
  20. WUFI-ORNL/IBP - A North American Hygrothermal Mode  


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