Green roofs and their properties

	Cross-section substrate layer [cm]	additional weight [kg/m²]	maintenance	Accessibility	Type of plants
Extensive	6-15	30-150	Minimal	No	Sedum, herbs …
Semi-intensive	15-30	150-400	Yes	Yes	Flowers, lawn, small shrubs,herbs
Intensive	> 30	>400	Yes	Yes	Any plant choice*

* Stipulated plants such as bamboo are to be avoided on green roofs because of their aggressive nature towards roots. For a full list of prohibitions, we refer to Krupka, Bernd. Dachbegrünung – Pflanzen und vegetationsanwendung an bauwerken. Stuttgart, Ulmer, . 2000

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