Green roofs have many benefits and what better way to reep these benefits other than by building your own, here is a web site that takes you step by step through making a green roof for a garden shed of other small building. It is a quick and easy process that will have results in a relactively short period of time and also reclaims the land the shed takes up.
http://www.bbc.co.uk/gardening/basics/techniques/gardenstructure_greenroof1.shtml
