Intensive Extensive Green Roof Systems

From a distance an extensive sedum roof can be mistaken for a grass field.

Intensive extensive green roof systems.

Intensive systems allow the designer to create a park like setting so they are the best option for roof gardens that will be occupied. There are two main forms of green roofs intensive and extensive. Contact adrian culling at info alumasc exteriors co uk and 03335 771 500. These are covered with low growing plants such as evergreen sedums.

A green roof is an additional roof system on top of an existing roof made up of a layer of planted vegetation. Extensive green roof an extensive green roof system is characterized of its vegetation ranging from sedums to small grasses herbs and flowering herbaceous plants which need little maintenance and no permanent irrigation system. Besides the visual impact of an extensive green roof they also provide a natural habitat for birds and insects. To start with take a look at the most simple family of green roofs.

Intensive roofs take more time to manage as they can hold up to 150 pounds of vegetation per square foot. Intensive green roofs weigh from 35 pounds to beyond 100 pounds per square foot when dry it is all a matter of the soil depth which is affected by the amount of mounding that is used. Blackdown green roofs are available in three broad application categories including extensive biodiverse and intensive and offer engineered living roof systems which are fully compatible with alumasc roofing system s warranted waterproofing ranges. A typical growing medium depth of an intensive green roof is 6 inches or more.

Extensive green roofs. The planting medium in extensive green roofs ranges from 1 6 to 6 inches deep and while deeper systems have been installed they are not favored as much as the shallower systems drought tolerant sedums succulent plants and grasses are the typical plants used since they are shallow rooted and use little water plant diversity on these roofs is kept low to simplify care and to be sure all plants have similar moisture requirements.