Plaster-based plasters are not in vain very popular in the field of finishing work. This is due to the ease of their manufacture, in contrast to mixtures based on cement and lime. Rotband gypsum plaster makes the surface of ceilings and walls even and smooth without roughness, and also helps to create a favorable microclimate in the house.
This article was created with the aim of acquainting with a universal and quite popular material for external and internal wall decoration - Rotband gypsum plaster.
Let's talk about its composition, scope of use, main advantages and disadvantages.
You will also learn instructions for application, technical characteristics, about the main stages of working with it, namely preparation of the base, surface, kneading and screed, sponging and smoothing.
The composition of the material includes gypsum and polymer additives, which contribute to better adhesion of the composition to the applied surface.
The first dry compositions for wall decoration appeared in building stores back in 1993 in Germany, they very quickly conquered the consumer market.
The mixture of plaster differs in shades, and this, in turn, depends on the constituent components, but does not affect the quality.
Rotband plaster is excellent for interior decoration. It is able to even out even "killed" surfaces, preparing the walls for further coating with paint, wallpaper, ceramic tiles.
In order to prepare it, it is necessary to combine dry ingredients with water and mix thoroughly to the desired consistency.
Rotband gypsum plaster has characteristics that allow maintaining performance for a long time. Gypsum included in its composition absorbs excess moisture from the external environment and gives it back, in case the air becomes too dry.
In addition, gypsum has low diffuse resistance and wonderful ability to maintain an optimal climate in the house.
Among the manufacturers of Rotband plaster, Knauf is the most purchased product. The product of this brand is most often used for finishing smooth surfaces (concrete walls and ceilings). This is due to the significant adhesion.
25 W / mK.
In houses for permanent residence, it is best to use Rotband universal gypsum plaster, due to the hygroscopic characteristics of gypsum.
For Rotband gypsum plaster, the consumption is designed for application in one layer, and is suitable for absolutely any type of hard or solid base in the house, with the exception of rooms with high humidity.
The mixture can be applied to any plastered surface, but best on bare concrete in all rooms. Also, in the kitchen, bathroom, toilet, common areas (bathrooms in hospitals, schools, train stations, hotels).
You can apply any paint, wallpaper, tile and other finishing materials to Rotband gypsum plaster.
The largest consumption at the starting or so called Rothband rough plaster.
And all due to the fact that to cover the flaws, the masters can apply up to 5 cm of a layer. Considering that for 1 cm of a layer (recalculation is in m²), you need 9 kg of material, in the end for 1 square walls need 45 kg of gypsum plaster.
In order for the plaster mixture to lay down exactly without defects, it is necessary to adhere to the rules prescribed in the instructions for use.
Foundation preparation - the most an important step before applying the plaster.
A properly prepared surface is the key to successful work. Walls and ceilings must be absolutely dry and free of dust and dirt.
Surfaces that are unstable absorbency (silicate, cellular concrete and so on.), treated with primer Knauf Grundiermittel . In order to avoid scratching the joints, a reinforcing mesh is attached.
Surfaces with low absorption capacity (polystyrene, concrete, etc.) are primed with Knauf Betocontakt.
Preparation of plasters their hands should be carried out as follows: the dry mixture is poured into a prepared beforehand water to volume and, using a drill -mixer knead the mixture at low speeds until a homogeneous material is obtained. The resulting mixture is applied to the substrate with a large metal spatula.
Gypsum plaster Rotband class "H" is used for initial leveling of the surface.
It is applied at a certain angle, it is applied at a slight angle to the substrate. Further, using a level, the applied layer is controlled. If the slope angle is large, you need to apply an additional layer and level. This work is carried out using a long trapezoidal spatula when the mortar begins to set. This process must be repeated in the same order and checked, there are no irregularities left after the first application.
After applying the rotband plaster, it must be sprayed with water with a stream of dispersion and with a special sponge walk over the surface in order to draw out the gypsum milk, the function of which is to smooth the top layer.
After the sponging stage is completed, the plaster will acquire a matte finish, then it is the turn of smoothing.
This is the process that makes a smooth surface in the end result.
As for the disadvantages, it should be mentioned that Rotband universal gypsum plaster is not cheap. Also, it can shrink, but this happens only when the technology of mixing and application to the surface has not been observed.
The price of Rotband gypsum plaster depends on the type used - rough or finishing, as well as the volume of the bag. The average price for a bag of 10 kg is 215 rubles.
, 5 kg - 120 rubles. , 30 kg - 400 rubles.
Posted By: Work Style |13, Nov 2020
Posted By: Work Style |10, Nov 2020
Posted By: Work Style |10, Nov 2020
Posted By: Work Style |12, Nov 2020
Posted By: Work Style |09, Nov 2020