At the peak of popularity, “green roofs” are on the construction market. Architects offer their clients to create a real green garden from the roof with grass, bushes, flowers and even trees. In Europe, the fashion for such designs appeared a long time ago. Let’s try to figure out how the green roof works. Initially, the difference between a roof garden and a green roof needs to be defined. For the device of the first, it is only necessary to place tubs and boxes with plants on the exploited area. The second option involves a more complex and specific design. It contains a layer of substrate for planting, a layer of drainage, a heat-insulating layer of rigid boards and a traditional roofing carpet.
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Green roofs are divided into intensive and extensive samples. Extensive roofs are much simpler and cheaper. They are not in use. The vegetation layer of such roofs does not exceed 15 cm. Low alpine plants are planted in it. Easy to care for. After the plants are accepted (most often after 1 year), it is enough to weed the lawn twice a year and examine the condition of the roof.
Intensive roofs, due to their design, have a layer of substrate, the thickness of which is 60 cm. Therefore, it is possible to plant trees and shrubs. These are exploitable roofs, as maintenance of all vegetation must be regular. Due to the fact that the thickness of the roofing cake is increased, structures that can withstand a large load from the coating should be used.
