Comments eedaughton has made
Green roofs
In addition to the type of green roof Umbra described, you can also buy trays of plants that link together to form a green roof. The waterproof membrane is also necessary, but it's neater and easier than spreading soil yourself. Not sure which suppliers sell them, but here's a link to some green roof providers, most of which are in the Midwest but may be able to refer you if you're not: http://egov.cityofchicago.org/webportal/COCWebPortal/COC_EDITORIAL/providers.html On Umbra on green roofs posted 3 years, 11 months ago 4 Responses