At present, in the construction of buildings of the most diverse profile, aerated concrete blocks, which are a type of the so-called cellular construction material, are increasingly used. Outwardly, such blocks resemble artificial porous rock with uniformly distributed voids of uniform shape throughout its volume. Products made of aerated concrete are in high demand among interested users, which is explained by the following remarkable material properties:
When finishing the buildings, the walls of aerated concrete blocks are covered with a layer of plaster, due to which it is possible to get rid of such defects of porous material as poor moisture resistance and a nondescript appearance. But before plastering aerated concrete, you will need to familiarize yourself with another feature of this material, which allows you to maintain a healthy microclimate inside the building. The fact is that this material has a good vapor permeability, the effect of which can be maintained only in the case of proper selection of the composition of the plaster and the thickness of the finishing layer.
Plaster for aerated concrete
For forming a high-quality protective coating (plaster layer) used for its preparation, the mixture should have the following characteristics:
Most modern plaster mixtures designed for finishing cellular materials fully comply with all the listed requirements.
When choosing a suitable plaster for your conditions, first of all pay attention to the special markings applied to the bags with the dry mixture and indicating that they can be used to work with cellular structures. The price of such mixtures is slightly higher than the cost of conventional finishing compositions, but in this situation one should not try to gain something, since any attempt to save could lead to unpredictable consequences.
Priming aerated concrete for interior finishing
Plastering The internal surfaces of the walls assembled from aerated concrete blocks are made in the following order:
Exterior plaster of aerated concrete walls
At the outside plastering should follow the following procedure:
Procedure of work
Procedure of work the finishing of the facades is somewhat different from the generally accepted one, since the plastering of aerated concrete blocks from the outside can be started only upon completion of all procedures related to interior finishing and after complete drying of all coatings.
It is not difficult to understand the reason for such an order of finishing.The fact is that residual moisture, which is always present in the finishing mixtures, during evaporation can form condensate that accumulates on the outer surface of the blocks. Its freezing at low temperatures leads, as a rule, to detachment of the plaster applied on top of it and to the destruction of the entire coating.
Workshop on aerated concrete plaster: