What is an extensive green roof?17 February 2022
An extensive green roof is a green roof with vegetation that is to a large extent self-perpetuating and needs low maintenance. An extensive green roof consists of a substrate layer and sedum plants. There are a lot of possibilities with green roofs. That’s why there are many different types of green roofs. There are extensive green roofs, intensive green roofs and blue-green roofs. Each is unique in its own way.
What is the difference between an extensive and intensive green roof?
Since there are many different types of green roofs of course you would like to know what actually the difference is between these types of green roofs. The difference between an extensive and intensive green roof is caused by the thickness of the layer, the weight and the level of maintenance that is needed. Extensive green roofs have a thickness between 5 and 20 cm. Extensive green roofs also differ in weight. There are lightweight green roof systems weighing 38 kg/m2 and also green roofs of 200 kg/m2. Since a green roof retains water, the weight of the green roof can increase when this is fully saturated. An extensive green roof has the least burden.
An intensive green roof is a green roof that needs a lot of maintenance. An intensive green roof is literally a garden on the roof. On an intensive roof, you can find different types of grasses, groundcovers, bushes and even trees. The use of these different types of plants means that an intensive green roof has to be maintained very well. Maintenance of an intensive green roof consists of watering, fertilising, pruning and weeding. This costs a lot of time and energy. Therefore, for residential purposes, it is often chosen for an extensive green roof system that needs minimal maintenance.
MobiRoof ECO: a lightweight green roof system
Looking for an extensive green roof system with low maintenance? Mobilane offers the solution to this: MobiRoof ECO. MobiRoof ECO is a ready-to-use green roof system that consists of plant cassettes filled with substrate and 6-8 different types of Sedum. With MobiRoof ECO, a green roof is easily realised in no time by placing the cassettes against each other. It is a green roof system that is suitable for flat roofs and slightly sloping roofs (20%). Maintenance work is required once or twice a year, consisting of general checks, fertilization in the spring and pruning from mid-September. With MobiRoof ECO, one can enjoy a green roof immediately without a lot of maintenance.