Green roof

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Green roofs in Bour, Faroe Islands
Green roofs in Bour, Faroe Islands
Shed green roof near Kancoona house
Shed green roof near Kancoona house

A green roof is a roof that is designed to be surfaced with plants.

A green roof, usually the roof of a building, is partially or completely covered with vegetation and soil, or a growing medium, planted over a waterproofing membrane. This does not refer to roofs which are merely coloured green, as with green corrugated iron or green shingle roofing.

Green roofs may also include additional layers such as a root barrier and drainage and irrigation systems. Container gardens on roofs, where plants are maintained in pots, are not generally considered to be true green roofs, although this is an area of debate. Rooftop ponds are another form of green roofs which are used to treat greywater.

Finally, the term "green roof" may also be used to indicate roofs that utilise some form of "green" technology, such as solar panels or a photovoltaic module. Green roofs are also referred to as eco-roofs, vegetated roofs, living roofs, and greenroofs.

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