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Green Roofing

Green roofs and living roofs are becoming increasingly popular and it’s not hard to guess why.

Apart from their aesthetic appeal they are also beneficial to our health and that of our environment, offering a place for wildlife, production of oxygen and giving additional protection from extreme weather conditions.

There are 3 main types of living roofs:

  • Extensive – Is usually a blanket of moss or/and herb (sedum) which requires very little maintenance.
  • Semi intensive – (Biodiverse) Which offers a playground and habitat for wildlife. This will consist of Herbs (sedum) and plants giving the area more scent and colour.
  • Intensive – In other words, a roof garden, so expect maintenance to be similar to that of a general garden.

The benefits of green roofing

  • The eco-system can be adapted for certain plant species depending on the access and use of the green roof.
  • Reduction of sound/noise especially hail and rainfall.
  • Increased roof lifespan by the reduction of the effects of UV degradation and extreme weather fluctuations.
  • Thermal benefits resulting in cooler summers and warmer winters.
  • Increasing biodiversity, wildlife and oxygen in urban areas.
  • Reduces the impact of storm-water runoff which in turn reduces the impact on local sewerage networks.
Extensive Semi intensive Intensive
Access/Use No Yes Yes
Plant/Vegetation Moss, Herb(sedum), Grass Shrubs, Herb(sedum), Grass Shrubs, Perennial plants, Lawn, Trees
Depth of substrate 60mm-200mm 90mm-300mm 150mm-400mm
Additional weight 60-150kg/m2 65-400kg/m2 180-500kg/m2
Maintenance/Cost Low Medium High

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