Green roofs are roofs with vegetation. Most green roofs are made up of the following layers: roof insulation, irrigation, drainage layer, soil and the layer of plants. They can be applied to flat or sloping roofs.
The vegetation may include succulents, perennial flowering plants such as carnation, campanula (bellflower), primrose, yarrow or buttercup; mosses, ferns, herbs, grasses or small bulbs, such as crocus or grape hyacinth. Since the plants growing on the roof are frequently exposed to heat, drought and wind, species that can withstand them well are chosen. As a result, green roofs require little maintenance.
Green roofs have several benefits. They absorb rainwater, improve roof insulation, lower urban air temperatures and filter pollutants and carbon dioxide from the air and heavy metals from rainwater. In addition, green roofs provide habitat for bees, butterflies and birds.
