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Airtightness of the window-wall interface in masonry brick walls

Nathan Van Den Bossche (UGent) , Willem Huyghe (UGent) , Jan Moens (UGent) and Arnold Janssens (UGent)
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Abstract
In recent decades there has been an increased focus on enhanced thermal resistance of building components and as a consequence, the relative importance of airtightness on the overall energy losses of buildings has increased significantly. The construction industry requires practical information on the airtightness of individual construction elements and building envelope interfaces. A literature review on the airtightness of window-wall interfaces has shown that no experimental data are available for masonry construction. This paper offers an investigative study on the airtightness of window-wall interfaces of masonry walls, for 13 different installation methods. The results show that the selected solutions cover a wide range of airtightness levels, from 0m³/h.m up to 31m³/h.m at 50 Pa. The experiments have permitted determining that a very good performance can be obtained by using polyurethane foam and caulking, airtight membranes, polyurethane foam and plywood framing, and plaster and caulking. On the contrary, mineral fibre insulation, a partial fill with polyurethane foam and plaster without caulking should be avoided when good airtightness is required. Furthermore, a comprehensive methodology for error calculation is offered, based on error propagation of partially correlated parameters, including the effect of measurement errors, extraneous air leakage and conversion to standard boundary conditions.
Keywords
airtightness, window-wall interface, brick cavity wall

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Chicago
Van Den Bossche, Nathan, Willem Huyghe, Jan Moens, and Arnold Janssens. 2013. “Airtightness of the Window-wall Interface in Masonry Brick Walls.” In Design, Implementation, Control and Durability : Feedback from Practice and Perspectives, Proceedings, 5–9.
APA
Van Den Bossche, N., Huyghe, W., Moens, J., & Janssens, A. (2013). Airtightness of the window-wall interface in masonry brick walls. Design, Implementation, Control and Durability : Feedback from practice and perspectives, Proceedings (pp. 5–9). Presented at the Design, Implementation, Control and Durability : Feedback from practice and perspectives.
Vancouver
1.
Van Den Bossche N, Huyghe W, Moens J, Janssens A. Airtightness of the window-wall interface in masonry brick walls. Design, Implementation, Control and Durability : Feedback from practice and perspectives, Proceedings. 2013. p. 5–9.
MLA
Van Den Bossche, Nathan, Willem Huyghe, Jan Moens, et al. “Airtightness of the Window-wall Interface in Masonry Brick Walls.” Design, Implementation, Control and Durability : Feedback from Practice and Perspectives, Proceedings. 2013. 5–9. Print.
@inproceedings{3202554,
  abstract     = {In recent decades there has been an increased focus on enhanced  thermal resistance of building components and as a consequence, the relative importance of airtightness on the overall energy losses of buildings has increased significantly. The construction industry requires practical information on the airtightness of individual construction elements and building envelope interfaces. A literature review on the airtightness of window-wall interfaces has shown that no experimental data are available for masonry construction. This paper offers an investigative study on the airtightness of window-wall interfaces of masonry walls, for 13 different installation methods. The results show that the selected solutions cover a wide range of airtightness levels, from 0m{\textthreesuperior}/h.m up to 31m{\textthreesuperior}/h.m at 50 Pa. The experiments have permitted determining  that a very good performance can be obtained by using polyurethane foam and caulking, airtight membranes, polyurethane foam and plywood framing, and plaster and caulking. On the contrary, mineral fibre insulation, a partial fill with polyurethane foam and plaster without caulking should be avoided when good airtightness is required. Furthermore, a comprehensive methodology for error calculation is offered, based on error propagation of partially correlated parameters, including the effect of measurement errors, extraneous air leakage and conversion to standard boundary conditions.},
  author       = {Van Den Bossche, Nathan and Huyghe, Willem and Moens, Jan and Janssens, Arnold},
  booktitle    = {Design, Implementation, Control and Durability : Feedback from practice and perspectives, Proceedings},
  keyword      = {airtightness,window-wall interface,brick cavity wall},
  language     = {eng},
  location     = {Washington D.C., DC, USA},
  pages        = {5--9},
  title        = {Airtightness of the window-wall interface in masonry brick walls},
  year         = {2013},
}