1. bookVolume 29 (2021): Issue 4 (December 2021)
Journal Details
License
Format
Journal
eISSN
1338-3973
First Published
23 May 2011
Publication timeframe
4 times per year
Languages
English
access type Open Access

Extensive Roof Greenery as a Response to Heat Islands: Some Problems

Published Online: 30 Dec 2021
Volume & Issue: Volume 29 (2021) - Issue 4 (December 2021)
Page range: 9 - 12
Journal Details
License
Format
Journal
eISSN
1338-3973
First Published
23 May 2011
Publication timeframe
4 times per year
Languages
English
Abstract

Extensive roof greenery is one of the ways to reduce the extent and impact of urban heat islands. A prerequisite is the correct design and operation of both the structural and vegetation part of a roof. If adequate maintenance, especially irrigation of the greenery, cannot be ensured, the use of extensive roof greenery can also be counterproductive. The case study to be presented deals with problems of a flat roof with extensive greenery above an underground garage under Central European climate conditions. Infrequent irrigation leads to extremely high temperatures of the substrate in the summer and makes the purpose of this roof pointless. The contribution analyzes the reason for the failure of the vegetation part of the roof, which was claimed to be maintenance-free, points out fire safety issues, and suggests improvements that might be considered in similar cases. At the present time, which is marked by the climate change crisis, there is great societal pressure to build green roofs. However, if it is not possible to ensure their perfect functionality, it is perhaps better to use classically proven types of roofs, but with greater reflectivity of the top layer surface.

Key words

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