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Test method to measure the relative capacity of wall panels to evacuate moisture from their stud cavity

Fazio, P., Mao, Q., Ge, H., Alturkistani, A. and Rao, J.
2007
Journal of Architectural Engineering, 13(4): 194-204


Fazio, P., Mao, Q., Ge, H., Alturkistani, A. and Rao, J., (2007), "Test method to measure the relative capacity of wall panels to evacuate moisture from their stud cavity", Journal of Architectural Engineering, 13(4): 194-204.
Abstract:
(Accepted 2 March 2007)

Abstract:Rainwater penetration is the source of moisture that causes the greatest damage to building envelope assemblies. The building envelope should be designed to reduce the amount of rainwater penetration by deflection and drainage. Since it is not realistic to assume a perfect wall without any leakage, the envelope should have the drying capacity to tolerate defects that may arise from the design, construction, and aging of the exterior wall system. Systems with a greater capacity to evacuate moisture from the stud cavity are less likely to undergo moisture damage. A new testing method is developed and deployed to evaluate the relative drying capacity of six wood-framed wall panels of different configurations built into a test hut and tested within a large scale environmental chamber. The wall panels used plywood, oriented strand board (OSB), or fiberboard as sheathing, but did not include cladding. A uniform moisture source was introduced in a water tray set on a load cell at the bottom of each stud cavity. The protocol is based on the hypothesis that the potential for moving a water molecule from the bottom plate to the exterior of the stud cavity is independent of the previous journey of that molecule, i.e., whether it has traveled from the interior of the bottom plate to the surface of the plate or whether it comes from free water in a tray at the level of the bottom plate. For a given set of boundary conditions, this potential is a function of the characteristics of the wall panel, and is identified as the drying capacity of the panel or its drying by evaporation index (DEI). The value of DEI corresponds to the evaporation rate. The moisture response of wall materials enclosing the stud cavity and the evaporation rate of the moisture source were monitored. The results show that this index can be used as an indicator of the relative drying capacity of different wall systems.

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Author Information and Other Publications Notes
Fazio, P.
Paul Fazio, Professor of Building, Civil & Environmental Engineering, Concordia University, Montreal
  1. A limit state design (LSD) approach for comparing relative drying performance of wood-frame envelope systems with full-scale lab, A roadmap towards intelligent net zero- and positive-energy buildings,
  2. A new test method to determine the relative drying capacity of building envelope panels of various configurations
  3. A new testing method to evaluate the relative drying performance of different building envelope systems using water trays
  4. A quantitative study for the measurement of driving rain exposure in the Montr¨¦al region
  5. A review of research activities in energy efficiency in buildings in Canada
  6. Airtightness testing and air flow modeling of two and three-unit multifamily buildings
  7. Airtightness testing of two- and three-unit buildings with a single fan
  8. Approach for the simulation of wetting due to rain infiltration for building envelope testing
  9. Approach for urban driving rain index by using climatological data recorded at suburban meteorological station
  10. Behavior of wall assemblies with different wood sheathings wetted by simulated rain penetration
  11. Building Physics: 3rd International Conference in Building Physics
  12. Building pressurisation can affect possibility of mould growth
  13. Cavity pressure in rain screen walls
  14. Comparaison de m¨¦thodes de mesure de flux de chaleur pour sp¨¦cimens de grandes et moyennes dimensions
  15. Continuous folded plate structures under uniform load
  16. Creative case adaptation for building engineering design
  17. Design and construction of an environmental chamber facility
  18. Design Methodology of Solar Neighborhoods
  19. Development of experimental procedure to evaluate potential movement of mold spores from wall cavity to indoor environment
  20. Development of HAM tool for building envelope analysis
  21. Effect of capillarity on rainwater penetration in the building envelope
  22. Environmental chamber for investigation of building envelope performance
  23. Essai sur les toits plats isol¨¦s ¨¤ la fibre de cellulose
  24. Evaluation of radiance's genBSDF capability to assess solar bidirectional properties of complex fenestration systems
  25. Experimental evaluation of potential transport of mold spores from moldy studs in full-size wall assemblies
  26. Experimental setup for the study of air leakage patterns
  27. Experimental study of temperature distributions across two curtain wall systems
  28. Folded sandwich plate structures
  29. Identification and transport investigation of microbial volatile organic compounds in full-scale stud cavities
  30. IFC-based framework for evaluating total performance of building envelopes
  31. Impact of added insulation on air leakage patterns
  32. Impact of air leakage pattern on reinsulated walls
  33. In-cavity evaporation allowance--A drying capacity indicator for wood-frame wall system
  34. Influence of air space on multi-layered material water vapor permeability measurement
  35. Influence of facade geometry on weathering
  36. Integrated analysis of whole building heat, air and moisture transfer
  37. Interzonal air and moisture transport through large horizontal openings in a full-scale two-story test hut: Part 1 - Experimental study
  38. Interzonal air and moisture transport through large horizontal openings in a full-scale two-story test-hut: Part 2- CFD study
  39. Large scale testing of two flat roof assemblies insulated with cellulose
  40. Mapping of air leakage in exterior wall assemblies
  41. Measuring air leakage characteristics with flexible double air chambers
  42. Measuring air leakage of full-scale curtain wall sections using a non-rigid air-chamber method
  43. Methods for the assessment of moisture content of envelope assemblies
  44. Modeling of moisture behavior of wood planks in nonvented flat roofs
  45. Modelling of indoor air humidity: the dynamic behaviour within an enclosure
  46. Moisture buffering capacities of five North American building materials
  47. Moisture performance of leaky exterior walls with added insulation
  48. Nonlinear elastic analysis of panelized shear sandwich walls
  49. Numerical investigation of the influence of room factors on HAM transport in a full-scale experimental room
  50. Performance evaluation protocol for full-scale wood-frame building envelopes
  51. Potential of rain screen walls to prevent rain penetration: pressurized cavity principle
  52. Quantitative driving rain exposure on a vertical wall at various Canadian cities
  53. Rapport Final Projet Site Internet - L'enveloppe du batiment et l'efficacit¨¦ ¨¦nerg¨¦tique
  54. Review and framework for large-scale laboratory studies on wetting and drying of building envelopes
  55. Study of the reduced impact of thermal bridges in two sprayed-applied polyurethane wall assemblies
  56. Study on thermal performance of curtain walls using infrared thermography
  57. Testing of flat roofs insulated with cellulose fiber
  58. The dynamic modelling of air humidity behaviour in a multi-zone space
  59. Transfer of heat, moisture and air through metal curtain walls
  60. Transient model for coupled heat, air and moisture transfer through multilayered porous media
  61. Use of an environmental chamber to investigate large-scale envelope specimen hygrothermal performance  
Mao, Q.
  1. A limit state design (LSD) approach for comparing relative drying performance of wood-frame envelope systems with full-scale lab, A roadmap towards intelligent net zero- and positive-energy buildings,
  2. A new test method to determine the relative drying capacity of building envelope panels of various configurations
  3. A new testing method to evaluate the relative drying performance of different building envelope systems using water trays
  4. Effect of capillarity on rainwater penetration in the building envelope
  5. Experimental Determination of Drying Capacity of Wood-Frame Envelope Systems for Comparative Studies and Limit State Design
  6. In-cavity evaporation allowance--A drying capacity indicator for wood-frame wall system  
Ge, H.
Ph.D, - 2002, Department of Building, Civil, and Environmental Engineering, Concordia University, Montreal
  1. Building Physics: 3rd International Conference in Building Physics
  2. Building pressurisation can affect possibility of mould growth
  3. Experimental study of temperature distributions across two curtain wall systems
  4. Measuring air leakage characteristics with flexible double air chambers
  5. Measuring air leakage of full-scale curtain wall sections using a non-rigid air-chamber method
  6. Study on overall thermal performance of metal curtain walls
  7. Study on thermal performance of curtain walls using infrared thermography
  8. Transfer of heat, moisture and air through metal curtain walls  
Alturkistani, A.
  1. A new test method to determine the relative drying capacity of building envelope panels of various configurations
  2. A new testing method to evaluate the relative drying performance of different building envelope systems using water trays
  3. Large scale experimental investigation of the relative drying capacity of building envelope panels of various configurations  
Rao, J.
Department of Building, Civil, and Environmental Engineering, Concordia University, Montreal
  1. A limit state design (LSD) approach for comparing relative drying performance of wood-frame envelope systems with full-scale lab, A roadmap towards intelligent net zero- and positive-energy buildings,
  2. A new test method to determine the relative drying capacity of building envelope panels of various configurations
  3. A new testing method to evaluate the relative drying performance of different building envelope systems using water trays
  4. Building Physics: 3rd International Conference in Building Physics
  5. Building pressurisation can affect possibility of mould growth
  6. Comparaison de m¨¦thodes de mesure de flux de chaleur pour sp¨¦cimens de grandes et moyennes dimensions
  7. Design and construction of an environmental chamber facility
  8. Development of experimental procedure to evaluate potential movement of mold spores from wall cavity to indoor environment
  9. Development of HAM tool for building envelope analysis
  10. Effect of capillarity on rainwater penetration in the building envelope
  11. Environmental chamber for investigation of building envelope performance
  12. Evaluation of radiance's genBSDF capability to assess solar bidirectional properties of complex fenestration systems
  13. Experimental evaluation of potential transport of mold spores from moldy studs in full-size wall assemblies
  14. Experimental study of temperature distributions across two curtain wall systems
  15. Identification and transport investigation of microbial volatile organic compounds in full-scale stud cavities
  16. In-cavity evaporation allowance--A drying capacity indicator for wood-frame wall system
  17. Interzonal air and moisture transport through large horizontal openings in a full-scale two-story test hut: Part 1 - Experimental study
  18. Interzonal air and moisture transport through large horizontal openings in a full-scale two-story test-hut: Part 2- CFD study
  19. Measuring air leakage characteristics with flexible double air chambers
  20. Measuring air leakage of full-scale curtain wall sections using a non-rigid air-chamber method
  21. Numerical investigation of the influence of room factors on HAM transport in a full-scale experimental room
  22. Review and framework for large-scale laboratory studies on wetting and drying of building envelopes
  23. Statistical analysis of microbial volatile organic compounds in an experimental project: identification and transport analysis
  24. Study of the reduced impact of thermal bridges in two sprayed-applied polyurethane wall assemblies
  25. Transfer of heat, moisture and air through metal curtain walls
  26. Use of an environmental chamber to investigate large-scale envelope specimen hygrothermal performance  



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