Hygrothermal Performance of simple intensive Green Roofs with Different Irrigation Schemes

Research output: Contribution to journalConference articleContributedpeer-review



Urban mesoclimate is formed by a multitude of factors enhancing climate change characteristics like increasing temperature levels, reduced air moisture content, atmospheric pollution or extreme rain events. All of these factors could be attenuated by green roof structures. Unfortunately, this potential is not being tapped in current building practice. The majority of erected green roofs are built as extensive, i.e. non-irrigated, types. This results in a poor mesoclimatic impact as the water contents of these roof substrate layers are meagre, and vegetation layers are more or less inactive during the dry, hot summer months. Intensive green roofs, on the other hand, require higher load-bearing capacities and costs, both often not eligible for refurbishments. A promising approach is a combination of simple intensive green roof structures featuring a thin substrate layer with reduced irrigation techniques, especially under the usage of grey water. The hygrothermal performance of these structures in comparison between different irrigation schemes and solar radiation levels is shown in this article. Measurements were performed over a period of about two years. Hygrothermal performance shows the importance of an optimised relationship between irrigation scheme, substrate type and thickness in order to achieve a sufficient evapotranspiration and temperature balancing effect.


Original languageEnglish
Article number012119
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 14 Jun 2023


Title13th Nordic Symposium on Building Physics
SubtitleBuilding physics as a key player for sustainable built environment
Abbreviated titleNSB 2023
Conference number13
Duration12 - 14 June 2023
Degree of recognitionInternational event
LocationCreate Aalborg University

External IDs

ORCID /0000-0001-9832-0464/work/142251636
RIS urn:D728355EC212C749767445F43E60A6A2
RIS urn:06C99652DDB4E6DCC13245F09DF4324B
Scopus 85169102348