Green roofs in today's urban times gain an increasingly important role in the world of construction. Before the construction of the green roof itself, we have to choose the type of roof that we will carry on the load-bearing structure and be well informed about the details associated with that roof type. Furthermore, it is necessary to determine the composition of the green roof, with a special reference when selecting the waterproofing. After the implementation of these two items follows the selection of the green roof. There are two main types of green roofs: extensive green roofs and intensive green roofs. The types of roofs will be described in more detail in the accompanying examples of general installation of green roofs. Green roofs have many benefits that they bring in ecology, society and the economy of the urban world. The role of green roofs will be described in these three categories. In ecology, it reduces the effect of thermal islands, enriches biodiversity, purifies water and improves air quality. In social discipline, green roofs, not only are they easy on the eye, but also reduce noise and thus restore peace to the life of the community. It is also possible to produce food on green roofs, which in urban areas also brings a big plus from the economic side. Also, on the economic side, green roofs also increase the number of jobs. Although it is necessary to initially invest more in building green roofs than usual roofs, later invested capital is returned multiple times