One of the technical features of a green roof is the use of several layers of membrane and insulating materials between the immediate roof base and the top layer of soil on the surface.
These materials are responsible for:
1. Uniform distribution of the load, and it can be quite large, because if 2-3 centimeters of soil is enough for lawn grass, then at least 15-20 centimeters are needed for flowers and shrubs.
2. Removal of moisture, which is necessary for the flora, but can be harmful to the internal structure of the roof. That is, in parallel it is necessary to solve two problems – to organize both drainage and waterproofing. To do this, modern durable membranes are used, both the LOGICROOF PVC roofing membrane and the TechnoNIKOL planter, which is responsible for both drainage and soil load distribution.
3. Soil retention and prevention of its slipping from the roof surface. This is especially true for gently sloping designs.
4. Thermal insulation, since even a thick layer of soil can freeze through, which means that thermal insulation boards must also be present in the roofing “pie”.
5. Watering. An optional solution can be considered automated irrigation systems (drip, jet), which are either laid in the topsoil or mounted on the roof surface.