Drainage from surfaces is one of the basic concepts of drainage for various objects in all climatic zones of the country (see SNiP 23-01-99). No matter what you do, just don't greet and you will live freely.
Drainage (water drainage, storm sewerage, water disposal) is part of the engineering system of the building, removing excess water from the surface of a building or site. Sewage (rain) is designed to receive rain and melt runoff, which, due to its large volume, contains a large amount of suspended matter in the form of various types of precipitation. To effectively drain water, it is necessary to competently approach the planning of the territory and proper drainage from the roofs of buildings. This task is important not only for the building structure itself, but also for the operation of residential, public and other facilities. The correct selection of materials is also important - stormwater systems and waterproofing materials. In countries with a dry climate, where precipitation occurs infrequently, the rain network is designed, observing building codes, using special methods