Green Roofs in the US

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by Carolina100
Last updated 6 years ago


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Green Roofs in the US

GreenRoofs in the US

Green roof refers to a system of roofing that uses plant life for roof covering instead of traditional covering materials.* History: Germany in the 60's.* Types: Intensive, semi-intensive (or semi-extensive), and extensive.

Storm Water AmeliorationGreen roofs store rainwater in the plants and growing mediums and evaporate water into the atmosphere. The amount of water that is stored on a green roof and evaporated back is dependent on the growing medium, its depth and the type of plants used.

Thermal Performance & Air QualityGreen roofs have been shown to lower the temperatures in urban areas and reduce the albedo effect. It also reduce air pollution.

Biodiversity and WildlifeGreen roof systems often mimic parks and include a variety of different plants. They also offer a natural habitat to many local animal life including insects and birds that were virtually driven out from urban centers.

Environmental Impact

Economic Impact

Heating and cooling costs- Green roof is likely to save 20% of its energy demand through reduction in cooling and heating needs.- Chicago estimated that the greening of all the cities roofs would save $100 million energy each year.

Extended Roof LifeA green roof system protects the waterproofing membrane from climatic extremes, UV light, and mechanical damage and in so doing almost doubles its life expectancy. A normal roof life expectancy of 20 year can be expected to last up to 50 years.

Creation Local Jobs- New job opportunities related to manufacturing, plant growth, design, installation, and maintenance.- American Rivers suggests that a USD $10B investment could create 190,000 jobs by building 48.5 billion-square-feet of green roof area.


Carolina OliveraUVU - ESLLevel IV

"As people flock to urban centers where ground space is limited, cities with green walls and roofs, and skyscraper farms offer improved health and well-being, renewable resources, reliable food supply, and relief to the environment" - Diane Ackerman, American Naturalist


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