Hi Lucy,
There’s a good company called Blackdown Horticultural Consultants who may be able to point you in the direction of some good examples that they have undertaken, or that they know of. Could try them for a friendly ‘please help’ e-mail? There MD does the lecture circuit, so he may be interested in being helpful…If you let hiom know its for ‘raising awarenes’ for developers and planners etc, i’d be suprised if they couldn’t be a little helpful.
In terms of costs, it varies quite a lot. We just finfished a fairly basic system with a 200mm substrate build up with seeding and plug plants, using a system / products supplied by Alumnasc (who incidentally, along wth BAUDER, would also be worth calling. They have technical / sales agents who know their stuff and are happy to be helpful in exchange for you as a ‘contact’), which worked out at about £125 per metre square (not including the waterproofing layer below, which is an essential of any roof…)
Plus these links may help…
http://www.livingroofs.org/
http://www.shef.ac.uk/landscape/greenroof/index.htm (powerpoint presentations)
http://www.wildlifeservices.co.uk/grassroofs.html
http://www.alumasc-exteriors.co.uk/Waterproofing/systems.aspx?systemid=30§ion=introduction
Hope this is helpful. Good luck. Gotta love the green roofs!!
