A green roof is a layer of vegetation planted over a waterproofing system that is installed on top of a flat or slightly–sloped roof. green roofs are also known as vegetative or eco–roofs. They fall into three main categories— extensive , intensive , and semi–intensive .

Do Cities Need More Green Roofs? | NPR Green roofs — also known as ‘vegetated roofs’ or ‘living roofs’ — are ballasted roofs consisting of a waterproofing membrane, growing medium (soil) and vegetation (plants) overlying a traditional roof.

Here, green-roof installer Rob Gaffney adds a second layer of rubber roofing membrane as a root barrier to prevent damage to the roof. Pro advice "Get a structural engineer to tell you what your existing roof needs to support the weight of a green roof.

A green roof system is an extension of the existing roof which involves, at a minimum, high quality water-proofing, root repellent system, drainage system, …

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Roof Sealant Gable Roof Gable roof with eaves, exposed, decorated rafters and soffits and stepped (incrementally ascending apexes). Curvy white stenciled fascia and artistic gilt gable end. To temple in Chang Mai, Thailand. Conical Chinese roof. Nanhai Academy, Taipei. A conical dry-stone roof on a Trullo hut. Slate Roof Buy the Slate Roof Bible, 3rd Edition Hardcover
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