Evaluation of daylighting performance in a retrofitted building façade

Doris Chi Pool, Eleonora Brembilla, John Mardaljevic

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

3 Citations (Scopus)


This paper analyses two main renovations of a University building façade retrofit from the viewpoint of annual daylighting improvement. Currently, this building consists of some teaching rooms connected by a hall but it is expected that this arrangement will change in order to accommodate two open-plan spaces for architecture students. The renovated design will increase the height of the North-East windows and introduce shading devices on the South-West facade. These renovations were explored to determine if the internal luminous conditions will maintain adequate levels. Five degrees of visual screening (100, 90, 70, 45 and 34%) and two slats positions (horizontal and vertical) were evaluated in relation to the building with no screens. Climate-based daylight modelling (CBDM) was carried out by using Diva-for-Grasshopper. The study revealed that effectiveness of convergence testing depends strongly on the choice of CBDM metrics employed as a diagnostic - an important consideration when modelling light transfer through louvres. Results recommended using louvred panels with no more than 70% of visual screening as higher percentages decrease useful illuminances over the range 300-3000 lux (UDI-a), to less than 50% of the occupancy time. Furthermore, vertical louvres were better suited to increase UDI-a than horizontal slats.

Original languageEnglish
Title of host publicationProceedings of 33rd PLEA International Conference
Subtitle of host publicationDesign to Thrive, PLEA 2017
EditorsLuisa Brotas, Sue Roaf, Fergus Nicol
Number of pages8
ISBN (Electronic)9780992895754
Publication statusPublished - 2017
Externally publishedYes
Event33rd International on Passive and Low Energy Architecture Conference: Design to Thrive, PLEA 2017 - Edinburgh, United Kingdom
Duration: 2 Jul 20175 Jul 2017


Conference33rd International on Passive and Low Energy Architecture Conference: Design to Thrive, PLEA 2017
Country/TerritoryUnited Kingdom


  • Climate-based daylight modelling
  • Façade retrofit
  • Louvred panels
  • Visual screening


Dive into the research topics of 'Evaluation of daylighting performance in a retrofitted building façade'. Together they form a unique fingerprint.

Cite this