If you look at a major European city with a plane, it is easy to see: about 60% of its territory is covered by roofs. Wise Europeans have long been multiplied expensive land in the city on the ability of modern building technology. And they came to the need for roofing as additional areas. In Ukraine, their experience will not be superfluous. Let's start with definitions.
Operated roof - is a special design, intended for the movement of people or vehicles, recreation, growing green plants, etc. Such roofs can, for example, to solve the problem of creating a playground or car park in the center city, where there is no free space. The main advantages of the exploited roofs - they increase the efficiency and functionality of the operation of (it turns out, in essence, an additional floor). In the case of a "green roof" important is also the question of ecology. Additional advantage of such roofs - covering under the protection of the working layer, and there are no problems with ultraviolet light.
In addition, improved thermal engineering characteristics, so you can apply a thin layer of thermal insulator. But to be fair to say and some of the shortcomings of the exploited roofs. These include the significant additional costs, more high demands on material selection and installation of roofing tiles (this is due primarily to the complexity of repairs), higher demands on the statics of the roof of the large weight, the need for continuous care operated surface. Operated roof is a "layer cake". From top to bottom layers are as follows: Exploited layer Separation layer Insulation layer Waterproofing layer and vapor control layer The layer, which creates a bias internal supporting structure of the roof covering operated roof can be divided into restricted and unrestricted in use. Limited. Movement on a roof is only allowed within the established zones.