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Green Roof Types

Roof Gardens or Green Roofs are broken into two broad categories: Intensive Roof Gardens and Extensive Roof Gardens.

  1. Intensive Roof Garden
    Typically designed to be walked upon and used as a recreational space. These often have lawn grass, small shrubs, and even small trees growing where soil is deep enough.

    The Intensive Garden requires between 150mm and 300mm of soil and may incorporate paths, terrace areas, water features, etc. Decks are usually concrete slabs, necessary to support the substantial soil layer, which can weigh up to 500kg/m².
  2. Extensive Roof Garden
    This is a lightweight garden designed mainly for visual appeal. It uses low maintenance vegetation layers laid on a shallow bed of specially-prepared lightweight soil 50mm to 100mm deep.

    The Extensive Roof Garden is not designed to be walked on, other than for occasional maintenance. Its light weight means it may be installed on metal and timber decking systems.

Both Intensive and Extensive Roof Gardens use special water retaining reservoir boards and geotextile fleeces laid onto the waterproofing system.

 

In addition to all types of green roofs ,Moy Materials now provide external living wall and internal green wall systems.