Different types of vegetation can grow on the roof. Possible types are: moss, sedum, herbs, grasses, ferns, shrubs or a combination. There is a difference between extensive (sedum) and intensive (planting) green roofs.
The filter layer prevents particles from the substrate from ending up in the water storage layer and clogging it up. It also ensures an even distribution of the water that can be absorbed by the plants.
The water retention is an extra drainage layer. This layer consists of a lightweight crate system in which rainwater is stored. Here, an integrated fibre technology has been incorporated, which makes water transportation from the storage to the plants possible.
By means of this “smart valve” the stored rainwater can be discharged or retained in the drainage layer. This smart valve responds to weather change and opens and closes automatically at the right times.
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