Daylight transmittance through Expanded Metal shadings


  • Jose Miguel Rico-Martinez University of the Basque Country, School of Architecture
  • Marcin Brzezicki Wroclaw University of Science and Technology, Faculty of Architecture
  • Carlos Gabriel Ruiz-Mugica University of the Basque Country, School of Architecture
  • Jakub Lech Wroclaw University of Science and Technology, Faculty of Architecture




expanded metal, daylight transmittance, solar shading, bidirectional scattering distribution functions, angular selective shading systems


Due to the substantial need for energy efficiency, the daylight performance of building envelopes is a key issue in sustainable architecture. A frequently used shading system consists on static expanded metal meshes (EM). As a very prominent textural facade element, expanded metal is widely used as both a cladding and static shading device.

One first aim is to provide a sufficient description of EM, including fabrication, possible usage and overall properties. This includes a set of parameters needed to control accurately the complex geometry of EM. Those parameters are also useful to get reliable 3-D computer models of EM.

The main objective of this paper is to assess, describe and compare EM light transmittance performance as a shading device. We were specifically looking to determine the influence of parameters such as geometry, colour, position and direction of incoming light on the shading performance.

The research is based on BSDF simulations via Radiance and experimental data provided at a previous laboratory stage. We have simulated and compared the performance of various EM shading devices for a south exposed façade in Madrid in most characteristic times of the year: solstices and equinoxes, as well as midday transmittance throughout the year.

How to Cite

Rico-Martinez, J. M., Brzezicki, M., Ruiz-Mugica, C. G., & Lech, J. (2020). Daylight transmittance through Expanded Metal shadings. Journal of Facade Design and Engineering, 8(1), 85–114.





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