A green roof is the practice of growing vegetation directly on a roof over a waterproof membrane. A roof garden is a similar technique that places container gardens on a roof. Both techniques may partially or completely cover a roof. Both may feature recreational facilities or commercial facilities such as a rooftop cafe.
Intensive vs ExtensiveA green roof comes in two varieties: intensive and extensive. Intensive includes a thick layer of soil that can support large vegetation such as small trees. An extensive green roof is characterized by a thinner layer of soil and smaller plants.
BenefitsGreen roofs may make a city more beautiful, clean the air, moderate urban heat islands, produce local food, reduce stormwater runoff, increase biodiversity and improve the efficiency of a building by acting as insulation. Rooftop gardens have many of the same benefits but generally aren't as effective at capturing water or insulating a building.
|Green Roof||Roof Garden|
|Definition||Vegetation planted directly on a roof over a protective waterproof membrane.||Vegetation planted in containers on a roof.|
|Potential Benefits||BeautificationAir QualityUrban Heat ModerationFood ProductionBiodiversity Reducing RunoffInsulation ||BeautificationAir QualityUrban Heat ModerationFood ProductionBiodiversity Reducing Runoff|
This is the complete list of articles we have written about cities.
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