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    Green roof


    What is a green roof? What are its pros and cons? Thanks!

    Asked by Abdul on 30th Jun 2022
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    "A green roof is a flat roof that has live growing plants, shrubs or lawn on top of a waterproof membrane. Green roofs can be generally grouped into three different groups.

    Intensive green roofs - This is normally more common on commercial roofs where the medium is typically 300mm or more, with shrubs, trees and lawn. These roofs are typically higher maintenance and have a higher weight load on the roof, needing more extra structural support than conventional roofs.

    Semi Intesive green roofs - Generally used within highly visible area's to improve aesthetic design using small shrubs, forbs, and grasses, with a medium amount of maintenance and growing medium between 150mm and 300mm.

    Extensive green roofs - Generally used on domestic flat roof extensions, garages and sheds. It's a light weight growing medium up to 100mm normally using low maintenance sedum trays with a pebble border.

    • Green roofs are important for holding water and then evaporating rainfall in a natural way over time to counter act flooding in the event of excess rainfall.

    • Protects the roof from the elements; wind, rain, ultraviolet light and fluctuating temperatures minimisng expanding and retracting in the waterproof membrane. They can actually prolong the life of a roof.

    • Environmentally beneficial for wildlife creating a eco friendly habitat attracting insects and birds. Also reducing carbon dioxide, resulting in better air quality.

    • More expensive than a traditional flat roof with just a waterproof membrane.

    • Higher weight loads than a traditional flat roof.

    • Can require different levels of maintenance depending on what type of green roof you have."

    Answered on 30th Jun 2022 - Member since May 2022 - report
    S.Palmer Roofing

    "A green roof is where you would have or garnished shrubbery on top of a new flat roof ie liquid rubber or fibreglass or single ply"

    Answered on 11th Jul 2022 - Member since Jun 2022 - report
    sos get gutted

    "A green roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproof membrane. It may also include additional layers such as a root barrier and drainage and irrigation systems."

    Answered on 30th Jun 2022 - Member since Jun 2022 - report
    Pure plastering & maintenance

    "A green roof is built up of agriculture. They save energy and provide heat within the house"

    Answered on 7th Jul 2022 - Member since Jun 2022 - report
    Yorkshire property care

    "A green roof is made up with insulation and then membrane then a plant type finish on the top looks abit like moss effect on your roof good system if done correctly"

    Answered on 14th Jul 2022 - Member since Oct 2021 - report

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