Sedum is a wonderful option for a green roof being a fairly tough plant that virtually looks after itself.
Some properties of a green (sedum) roof:

a) Helps alleviate flooding by delaying the process of rainwater runoff and so puts less pressure on sewerage systems.

b) Thermal Insulation simply helps create an extra layer and so the room beneath is warmer in winter and kept cooler in summer.

c) Natural habitat for birds insects and animals…they all benefit from a green roof.

d) Aesthetics: it looks good! The only alternative with this scheme was gravel…which intime would have become discoloured with algae. The colours of the sedum roof will change throughout the year providing a truly living roof.
This closeup shows the drainage layer with small pvc cells which hold the rainwater providing a steady supply to the root system.


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