A few words about plaster for expanded polystyrene
Plaster for expanded polystyrene has the appearance of a dry composition on a cement basis. It is used for internal and external works. It is applied on top of polystyrene boards using special technology. It is manufactured in accordance with GOST, sanitary-epidemiological conclusion and has certificates confirming its reliability and high quality.
The main properties of this material are: excellent adhesion, high strength, frost resistance, water resistance, elasticity. Due to such characteristics, the applied coating withstands almost any weather phenomena and is particularly reliable. That is why such a plaster, if properly applied, can hold on to the base for many years.
How to prepare the plaster
The special plaster under which the extruded polystyrene is placed performs a number of protective functions. Namely: protects against excessive ultraviolet exposure, mechanical damage, temperature changes. Such plaster is usually used in two cases: for gluing the mesh( an obligatory element when finishing expanded polystyrene) and for creating an equalizing coating.
The method of preparation of the mixture is always indicated on the manufacturer's packaging. The solution for plastering the walls is poured from the package into the container and warm water is gradually added( with an approximate temperature of +15 to +20 ° C).In the process, the solution is stirred. As a result, you should get a creamy mass without lumps. For mixing, you can use a drill or mixer with a special nozzle at a speed of 400-800 rpm. After( for 5 minutes) pause and mix again.
Application technology
Finishing the facade of the house involves several stages. But in any case, first mounted polystyrene under the plaster. Next, put a grid with cells measuring 5x5 mm. For its attachment, a universal plaster with a total layer thickness of 2-3 mm is used. Roll the mesh evenly rolled over the entire surface and 5 centimeters at the edges left free. Such gaps in the future will be used to form joints.
Note! It is important to choose a grid so that it has resistance to alkaline compounds.
After the mesh is glued to the surface, it is smoothed with a smoothing iron or a metal spatula. The compound should grind and dry for 24 hours. Then begin grout with a grater( preferably plastic), which must be attached to the abrasive cloth. Grout is done in a circular motion. At the final stage, they begin to level the surface with plaster.
Wall plaster is applied with the same composition. A wide spatula is applied a layer with a total thickness of 2-3 mm. About one day the coating dries up and the grout is done using the technology described above( in circular motions).Next, the plaster is primed and covered with another layer of decorative plaster.
Note! All of the above work is important to carry out in appropriate conditions - in windless and dry weather. The air temperature should be from + 5 ° to + 35 ° C.Humidity, too, should not be too high.