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Green roofs can be partially or completely covered with vegetation. By absorbing heat, they reduce the heat island effect and dramatically improve the roof’s insulating values. These systems also lengthen the lifespan of the roof, sometimes by as much as two times. This results in savings in heating and cooling costs, as well as roof repairs and replacement.
The environmental impact of these buildings and their green roofs has become increasingly important in today’s design and installation. They are giving new value to the role of buildings within urban planning. The design brings back the natural element to the urban environment. Secondly, the design is advantageous in its efforts to provide solutions for important issues, including urban heat, island effects, waste materials, and storm water management.
Extensive roofs use shallow soils, typically 7–10 cm deep, which makes them the lightest option available. These soils support plants like sedums, moss, herbs, and grass, and they also accommodate other low-maintenance vegetation, providing flexible planting options.
Beyond their aesthetic and ecological benefits, they protect the waterproof membrane and significantly reduce water run-off. Inspect the roof once or twice per year to ensure proper maintenance. Fertilize the plants annually in the fall or early spring to promote healthy growth and long-term success.
Most green roofs do not require irrigation systems, as they thrive under typical weather conditions. However, during prolonged dry periods, you may need to provide irrigation. Routine access to the green roof remains unnecessary, making it a low-maintenance and efficient choice.
Intensive roofs have a deeper soil layer (upwards of 15cm ). This type of roof also has a wider variety of plants that can be grown. This includes lawns, ornamental bushes and even semi-mature trees. The type of plants desired determines the depth of soil required, the possible need for an irrigation system, and the level of maintenance. Regular roof access is normally provided. So, this is great for paved areas, walls, and even water features.
