Tip 2: How to achieve cleanliness in the stairwell

Before you start greening the roof, you need to find out the design features of the latter. It should be borne in mind that this is an additional load for the structure. Here you will need the professional advice of an architect or a civil engineer. In the case of new buildings, the load is calculated in the design. If you want to plant an already existing structure, you need to check what additional load the roof can take. Depending on the density of landscaping, the truss structure accounts for the weight from 25 to 165 kg per square meter.
Extensive and intensive roof gardening
Both options differ in density. Extensive planting is obtained primarily from dry-loving plants, for example, from moss. Advantages: landscaping the roof does not require maintenance and has a small weight, which is suitable for a thin roof, like a garage. Of course, extensive roof gardening provides less insulation.Intensive landscaping is a full-fledged building. Grassy perennials like asters, daisies, lily, various herbs and even trees can grow here. Disadvantage: such landscaping will be appropriate only on sturdy structures that can withstand a large load.
Green roof device: functional layers
The green roof consists of several functional layers. The bottom layer, which is placed directly on the roof - waterproofing. Its function is to divert excess water and prevent soil dampness for future plants. Next comes the protective layer from the roots. The next layer is drainage, the function of which is to absorb and drain excess moisture. Then - the filtration layer separating the drainage from the soil.
In order for the soil not to be washed away by rain and under the force of gravity it does not deform, a geogrid is laid. So that the substrate does not crawl, you can strengthen the sills from the slip on the roof. This way everything will stay in place. Next is a layer of soil. At the same time the ground should be covered with a thin layer of mulch, which will provide nutrients and support the growth of plants. The final layer is vegetable.