Our climate quite aggressively affects the outer surfaces of buildings, partially destroying them. First, the walls facing the street are rarely completely dry. Wet snow, fog and rain saturate the outer surface of the wall with moisture.
After dissolving, the components of the plaster begin to move to the outer surface of the wall. There they partially dry out, partially interact with carbon dioxide and form not very beautiful white spots on the walls — efflorescence.
Secondly, all year round the walls are exposed to cyclical alternating temperature effects. During the day, when the sun is shining, they warm up to positive temperatures, and as soon as the sun sets, they begin to cool down and freeze. Freezing in pores and capillaries, water increases in volume and expands its container. The resulting internal stresses lead to the formation of microcracks and the opening of pores..
Therefore, the harsh world of the outdoor environment places high demands on plasters for outdoor use. They must be durable, water-, frost- and weather-resistant, do not let water inside and, at the same time, let off steam outside. It is desirable that they be elastic in order to compensate for seasonal thermal deformations of the wall materials. With all this, they must be durable and delight the eye with freshness of color..
The technical standards set out in SP 42.13330.2011 Urban planning. Will help novice architects and urban planners to understand the intricacies of urban construction planning. Developers can also be guided by the data of technical standards and comprehend the nuances.
