About Green Roofs

Green Roof Technology
About Green Roofs

green roof, or rooftop garden, is a vegetative layer grown on a rooftop, planted over a waterproofing membrane.




  • Extensive Green Roof
    Extensive Green Roofs is a suitable choice for roofs with little load bearing capacity or sites that are not designed to be used as roof gardens. The costs are lower than any other green roof type and it is a generally less demanding growing type.
  • Semi-intensive Green Roof
    Semi-Intensive Green Roofs range between Extensive and Intensive Green Roof systems in terms of requirements. They need more maintenance and they are less cost-efficient than the Extensive Green Roof type.
  • Intensive Green Roof
    Intensive Green Roofs is a suitable green roof type for the plantation of lawn, bushes or even trees. There are very few limitations in such type but they are high-maintenance and permanent irrigation as well as fertilization have to be ensured.
Green Roof Technology


The number of green roof layers varies among the various green roof types, but green roofs traditionally include:

insulation, a waterproof membrane, a drainage layer such as gravel or clay, a mat to prevent erosion, soil and the plants covering the entire roof deck surface.

For successful establishment and long lasting vegetation it is crucial to consider among others, the local conditions, as the vegetation layer can be modified according to them.

Additional considerations also include:

wind exposure, air pollution, variation of temperature as well as local light and moisture conditions.