This system must be fed more fertilizers than, for example, a “economical roof” system with a slightly larger weight. The “economical roof” system in water drinking water weighs, for example, eighty – one hundred kilograms per meter square, that is, as much as the crushed stone layer five centimeters thick. This means that if the customer intends to use a protective layer of crushed stone, then in the absence of additional calculations he can choose a system solution “Economic roof”. This system solution provides for the design of one substrate layer. A vegetative form for this type of extensive landscaping with a height of about eight centimeters is a mixture of Sedum and moss that is not in need of special care.
Green roof is made by load when the conversation comes about useful areas, t. e. on foot. Thus, the saturated landscaping system arranged by the system solution “GardenDach” (Gartendach), depending on its height, weighs approximately 320 kg/m2 and more. The weight of the system can also contribute to the likely stagnation of water in a drainage layer of bulk material.
