catseye
Old lady trouser-smell with yesterday's knickers
- Joined
- Feb 1, 2010
- Messages
- 8,729
- Location
- York
You shouldn't use grass on a green roof. You need mediterranean type plants with very shallow root systems, that are drought resistant. Hence the usual use of sedums and sempervivums or herbs that grow naturally in barren rocky soils. Grass is really really unsuitable for green roofs, although it's great if the entire building is covered with soil - like the Gloucester Services service station on the M5.Yeah they do - there are modern properties that have deliberately been designed with grass and wild flowers on the roof.
They look great when they're new but because it's difficult to get up there with the mower they very soon look terrible, and then die.
Like these ones that I drive past regularly, next to the A1 at Welwyn.
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