The Wicked Problem of Façade System Assessment
Keywords:Façades, building skin, curtainwall, building envelope, façade performance metrics, façade performance , sustainable façade systems, building resilience
Building façades are key to the building systems integration necessary to realise critical health, carbon,
resilience, and sustainability goals in buildings and urban habitats. In addition, façade system design
and delivery may be the most rapidly developing building technology, with novel materials, assemblies
and techniques introduced in the marketplace frequently. However, these developments are occurring
in the long-running absence of an appropriate framework for façade system performance evaluation.
There has been no general convergence on the assessment criteria nor, for the most part, on the metrics
to accompany those criteria. The convergence of myriad and often competing variables that characterise
the building façade mark the development of a comprehensive integrative assessment framework as
a wicked problem, The lack of such a framework inhibits meaningful development and adoption of
innovative façade technology, leaving aesthetic considerations to drive application and compromising
the evolution of performative system behaviour. It prohibits a meaningful comparison between façade
systems, or of new techniques with prior applications. Adoption of new façade technology is constrained
as designers, building owners, and, most importantly, authorities with jurisdiction at the level of city
government are unable to accurately value its performative contribution to occupants, to a building
project, or to the urban environment.
Very early efforts and thinking in the development of a comprehensive Integrative Façade Assessment
Framework by the Façade Metrics Working Group of the Façade Tectonics Institute are documented
here. A preliminary review of existing façade system metrics and assessment strategies reveals they
are fragmented, too narrowly focused, and lack the comprehensive integration to provide an accurate
evaluation. With a strong focus on energy performance in new buildings, deep and vital considerations
like retrofit and renovation strategies, passive survivability, durability and service life, and resilience are
often neglected entirely. We outline some new directions that begin to address these gaps and suggest
a data-rich, visual framework and knowledge-sharing platform to advance progress with enhanced
metrics and façade systems evaluation and comparison.
Avesani, S., Babich, F.& Papaiz, L. (2019). M3. 5: Report on the key performance indicators. Facecamp.
Bianco, L., Cascone, Y., Avesani, S., Vullo, P., Bejat, T., Koenders, S., Loonen, R. C. G. M., Goia, F., Serra, V., & Favoino, F. (2018). Towards new metrics for the characterisation of the dynamic performance of adaptive façade systems. Journal of Façade Design and Engineering, (S.l.), v. 6, n. 3, p. 175-196, oct. 2018. ISSN 2213-3038.
Beltran, L. & Liu, D. (2020). Evaluation of Dynamic Daylight Metrics based on Weather, Location, Orientation and Daylight
Availability, Passive Low Energy Architecture 2020
Browning, W., Ryan, C., & Clancy, J.(2014). 14 Patterns of biophilic design: Improving health & well-being in the built environment. New York City: Terrapin Bright Green. Retrieved from http://www.terrapinbrightgreen.com/wp-content/ uploads/2014/04/14-Patterns-of-Biophilic-Design-Terrapin-2014e.pdf
Carlucci, S., Causone, F., De Rosa, F., & Pagliano, L. (2015). A Review of indices for assessing visual comfort with a view to their use in optimization processes to support building integrated design. Renewable and Sustainable Energy Reviews 47, 1016-1033
Dave, S. H. (2012). Comprehensive performance metrics for Complex Fenestration Systems using a relative approach. (Master’s Dissertation), Massachusetts Institute of Technology.
Dubois, M-C. (2003). Shading devices and daylight quality: an evaluation based on simple performance indicators. Lighting Res. Technol., 35.1, 61-76
Galatioto, A., & Beccali, M. (2016). Aspects and Issues of daylighting assessment: A review study. Renewable and Sustainable Energy Reviews 66, 852-860
Hartwell, R., & Overend, M. (2020). End-of-life challenges in façade design: A disassembly framework for assessing the environmental reclamation potential of façade systems. Proceedings of the Façade Tectonics Institute 2020 World Congress, 19 August 2020. Retrieved from https://www.façadetectonics.org/papers/end-of-life-challenges-in-façade-design
Ko, W.H., Schiavon, S., Brager, G., & Levitt, B. (2018). Ventilation, Thermal and Luminous Autonomy Metrics for an Integrated Design Process. Building and Environment, Vol 145, 153-165.
Mardaljevic, J. Heschong, L., & Lee, E. (2009). Daylight metrics and energy savings, Lighting Research and Technology, 41(3), 261-283.
Mardaljevic, J. Andersen, M. Roy, N., & Christoffersen, J. (2012). Daylighting Metrics: Is There a Relation Between Useful Daylight Illuminance and Daylight Glare Probability? First Building Simulation and Optimization Conference, IBPSA England Morrison Hershfield. (2020). Building envelope thermal bridging guide, version 1.4. BC Housing Research Centre.
Morrison Hershfield. (2018). Guide to low thermal energy demand for large buildings. BC Housing Research Centre.
Norris, N., Carbary, L.D., Yee, S., Roppel, P., & Ciantar, P. (2015). The reality of quantifying curtain wall spandrel thermal performance: 2D, 3D and hotbox testing. BEST 4 Proceedings, National Institute for Building Science.
Patterson, M. R. (2017). Skin fit and retrofit: Challenging the sustainability of curtainwall practice in tall buildings (Doctoral Dissertation). Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll40/id/457628/rec/16 Reinhart, C.F., Mardaljevic, J., & Rogers, Z. (2006). Dynamic Daylight Performance Metrics for Sustainable Building Design, Leukos,
Rittel, H. W. J. & Webber, M. M. (1973). Dilemmas in a general theory of planning. Policy Sciences 4, 155-169. Amsterdam: Elsevier Scientific.
Roppel, P., Lawton, M., & Norris, N. (2012) ASHRAE research report 1365: Thermal performance of envelope details for mid & high-rise buildings. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc
Shafavi, N.S., Tahsildoost, M., & Zomorodian, Z. S. (2020). Investigation of illuminance-based metrics in predicting occupants’ visual comfort (case study: Architectural design studios), Solar Energy, 197, 111-125
Van Den Wymelenberg, K., & Inanici, M. (2015). Evaluating a New Suite of Luminance-Based Design Metrics for Predicting Human Visual Comfort in Offices with Daylight. Leukos, 12:3, 113-138
Van Den Wymelenberg, K., & Inanici, M. (2014). A Critical Investigation of Common Lighting Design Metrics for Predicting Human
Visual Comfort in Offices with Daylight. Leukos, 10:3, 145-164
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Copyright (c) 2021 Keith Boswell, Stéphane Hoffman, Stephen Selkowitz, Mic Patterson
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