Gypsum plaster has a vast areause, it is used for finishing different surfaces of all kinds of purposes. Specialists are often advised to replace it with cement-lime compounds. Alignment with this mixture has many advantages. This is due not only to the quality of the work, but also to the insignificant consumption of the material, because the plaster composition is based on gypsum with light fillers, which allow saving. 
Scheme of plaster walls. After application, the mixture dries quickly, there is no need to make an additional leveling of the substrate.
A feature of using gypsum plaster
Aligning walls with gypsum compositionis made in the internal space of premises, the conditions of which do not differ with a high level of humidity, these can be buildings for residential and commercial purposes. After the application of gypsum plaster, you can proceed to the decorative finish. The leveling of the walls by means of the described composition can be carried out if there is a need to correct significant unevenness, since the application can be made with a massive layer. The use of the composition makes it possible to mask significant defects represented by holes. 
Table of deviations in the quality of plaster. By means of a mixture, the level of the substrate can be corrected, paying attention to the areas where the wall falls back. Aligning the walls with a gypsum-based composition can be made even in the children's room, because the mixture is completely ecological and does not emit harmful substances during the application and operation. If there is a need to insulate the room, then it is worth using plaster plaster, as it allows to equip a high-quality thermal insulation layer, which performs the function of noise insulation and fire protection. In view of the fact that after application to the walls the mixture forms a porous layer, in the interior of the heated and airtight room, where the air circulation is worsened and the temperature is increased, the composition absorbs excess moisture, while the elevated temperatures can be leveled off in a short time and the climate is improved. Often, some owners face such problems as constant floods from neighbors from the top, divorces sometimes reach the walls. The leveling of the walls in this case is recommended to produce a gypsum mixture, which contributes to the disappearance of stains. If the plaster is to be applied to a concrete surface, then it must be used in tandem with the primer material. This eliminates the use of the reinforcing layer. Gypsum plaster dries out after 5 days after completion of works. In the future, it can be used as a basis for gluing wallpaper, because no additional alignment is necessary. Back to contents</a>
Application technology
Scheme of preparation of the wall for applying plaster. By the volume of the gypsum composition, much less is required if a comparison with the cement mixture is made. And if the wall has a big difference in the levels from the top and from the bottom, the composition can be applied in one layer, the thickness of which can reach 60 mm. The wizard can not be afraid of the fact that the composition will become flaked, covered with cracks or will have the effect of shells. Back to contents</a> Preparatory work The plaster mustbe applied under certain temperature conditions, the permissible mark varies between 5-30 ° C. In advance, the substrate must be cleaned of dust, get rid of layers, old finish. It is necessary to take out steel hooks and other elements. If there are any components on the surface of the wall that can not be removed, then they must be treated with an anti-corrosive compound. Plaster will lie better if you pre-primed surface. Bases that are capable of excessively absorbing moisture must necessarily be covered with a primer. These surfaces include: foam and aerated concrete, brickwork, as well as plaster based on cement and lime. Back to contents</a> Shutting off the solution 
Proportions of plaster solutions. If you decide to level the walls with plaster, then to prepare the mixture, the composition should be poured into a container in which there is clean water, when closing it is necessary to take into account the proportion: 0.7 liters per 1 kg of dry mixture, if you purchased a 30 kg bag, then for it will require 21 liters of water. The mixture must be mixed well. The solution should be left for 3-5 minutes, then it needs to be stirred again. Stucco walls using the prepared portion should be completed within 30 minutes. You can not add foreign components to the composition. Back to contents</a> Application of plasterwall, applying on the base in one layer, providing a thickness of 50 mm, if you work locally, then the thickness of the layer can be increased to 80 mm. Align the surface by working the tool from the bottom up. The final alignment of walls or partitions must be done by making zigzag motions, using an h-shaped rule. An hour after application and the beginning of setting from excess amounts of the mixture must be disposed of, a trapezoid rule should be used, while the resulting irregularities must be filled. After the application of the trapezoidal rule, traces remain, which can be eliminated by the method of smoothing with a wide spatula. After the described alignment process, you should wait about 20 minutes, and then check whether the plaster is pushed when pressed with your finger. If this effect is not present, then the surface of the walls should be moistened abundantly, pause until the surface becomes dull and mash with a sponge, making circular motions. 
Plastering tools.Walls prepared in this way should be smoothed out with a wide trowel. In order to get a perfectly smooth base, after about 24 hours it is necessary to re-smooth the surface with a spatula, but first, however, the wall must again be abundantly moistened with water. The processing carried out in this way does not subsequently imply filling. After the leveling of the walls has been completed within the first 24 hours, it is necessary to provide the most suitable conditions for normal hydration and high-quality setting of the mixture, a suitable microclimate will guarantee stable adhesion of the composition to the surface. During this period, drafts should not be arranged in the room, the coating should not be exposed to intensive drying and exposure to the sun. After the end of this period, it is necessary to ventilate the room, which will allow excess moisture to be expelled from the plaster. During drying, it is necessary to maintain the temperature in the room within + 5- + 25 ° С. Many masters wonder after the walls have been aligned, how long the plaster dries. If the room has good ventilation, and during the work a mixture of the Teplon brand was used, then it will dry out in a period limited to 7-14 days. Wet and dark surfaces will eventually lighten and dry out. If after you plan to paint the base, then the moisture level of the mixture should not be higher than 1%. For painting work on such a surface, it is permissible to use emulsion, glue and other types of paints, but there is one exception - lime compositions. To carry out work on the application of gypsum plaster, materials and tools should be used:
- putty knife;
- rule;
- mixture;
- mixer;
- capacity.
Despite the fact that the described workis considered quite a simple task, the master will require special knowledge and skills, the work will not be done correctly if the specialist does not pay special attention to certain stages. It is possible to check whether the work is done correctly by analyzing the surface of the mixture. It should have a smooth, uniform surface, not devoid of minor pores, all kinds of streaks, scratches and bubbles should not be. It is inadmissible to assess the quality of the applied mixture in poor lighting conditions. If you have not yet chosen the method of leveling the walls, then it can be noted that modern professional companies are choosing their choice in the direction of gypsum material for internal works.
