Experts recommend that you be especially careful in decorating rooms with high humidity: do not use materials that are not able to withstand the aggressive effects of temperature and moisture. For example, it is not recommended to use wallpaper or gypsum putty in the bathroom - very soon the room will need to be repaired again.
But polymer and cement plasters are resistant to such influences. Modern high-tech materials for wall decoration, which include moisture-resistant plaster for the bathroom, make it possible to use it in rooms with a high level of humidity along with traditional materials - tiles, panels, paint.
Moisture resistant plaster: types, application
Today, domestic and foreign manufacturers of finishing materials offer a fairly wide range of waterproof mixtures. We suggest you familiarize yourself with the most common options and the possibilities of their use in a humid environment.
Depending on the substances that make up the moisture-resistant plaster for the bathroom, they distinguish:
- silicate;
- mineral;
- acrylic;
- silicone.
It is important to choose the right kind of material so that the work done does not disappoint you.
Mineral plaster
Mineral plaster in its composition contains lime and cement. To give a texture, it is additionally added marble, carefully ground. The larger the pieces of marble, the deeper the relief of the plastered surface. This is a waterproof plaster for the bathroom. Its protective properties are explained by the fact that hydrostable components are included in its composition.
It is convenient to care for such a surface - most of the dirt is easily washed off with water. Mineral finish has excellent water and vapor permeability. Due to this, the walls "breathe". In addition, this material is resistant to mechanical stress and long service life. Almost all varieties of this material are made in bright colors. Choosing this moisture-resistant plaster for the bathroom, you should take into account its small flaws - low elasticity and intolerance to vibrations.
Polymer plaster
Acrylic (polymer) plaster is a water-based mixture. She is ready for use. It consists of ash elements and synthetic resins, crushed marble and glass. These compounds are amenable to tinting, so problems with the choice of colors, as a rule, do not arise.
Such moisture-resistant decorative plaster for the bathroom has its advantages and disadvantages. The advantages of such compositions include resistance to moisture, but at the same time, like any polymer, it does not let steam through at all, so its use in rooms with poor ventilation is not recommended. Another indisputable advantage of such a coating is its long service life - such plaster will last you up to fifty years.
The best acrylic plasters
The following compositions have proven themselves well:
Profit
Cement-polymer mixture, which has a waterproofing. It shows good results when applied under ceramic tiles.
Consolit 540
Waterproofing plaster, which is a multicomponent composition based on a polymer-cement mixture.
Dufa kratzputz aussen
Acrylic based plaster. It is used as a moisture resistant plaster for a bathroom with a decorative effect. It differs in its original texture - “orange peel”.
Stuc Granito, Stuc Deco
Moisture-resistant mixtures containing a polymer as a binder component. They have excellent decorative properties.
Silicone plaster
The composition of this plaster includes silicone resins. Those who want to make repairs in the bathroom for a long time, we recommend that you pay attention to these compounds. The durability of silicone plaster is more than sixty years.
Silicone plaster in the bathroom is good in that it repels water from the surface and is also easy to clean. On such surfaces, fungus or mold never starts. Moisture-resistant silicone-based plaster tolerates ultraviolet radiation well.
Silicate decorative plaster
At the heart of this finishing material is potassium glass, which is sometimes called liquid glass. Surfaces covered with silicate plaster repel water very well, they protect the walls from mold and mildew. In addition, this material is characterized by high vapor permeability. This moisture-resistant plaster for the bathroom is also attractive with a huge selection of colors - there are more than 250 shades.
The disadvantages of this material are buyers quite a high price (from 3.5 to 5 thousand rubles per 25 kg).
Gypsum compounds
The opinions of experts differ on this material: some believe that it is not very suitable for decorating the bathroom, others claim that the moisture-resistant gypsum plaster for the bathroom is good, but subject to good ventilation in the room. The fact is, gypsum has one drawback - it actively absorbs moisture. Despite this, gypsum plaster is often used to decorate the bathroom, especially the ceiling.
Buyers are attracted by the whiteness of this material, which greatly facilitates painting, ease of application and leveling of the surface and quick drying. In order to eliminate the main disadvantage, additives (for example, PVA glue) are used in the preparation of the composition and coating of the plaster layer with a special water-repellent primer. The applied layer should be no more than 25 mm.
The application of moisture-resistant plaster in the bathroom (based on gypsum) is justified in case of using compounds from well-known manufacturers. They produce mixtures with the addition of special ingredients. For example, moisture-resistant plaster for the bathroom (Knauf) Rotband, based on gypsum, is designed specifically for rooms where the humidity is very high. You can also note the finished moisture-resistant composition "UNIS Teplon".
Formulation Guidelines
Moisture-resistant plaster for the bathroom should be chosen, taking into account what the final coating will be. Quite often, in rooms with high humidity, the walls are lined with ceramic tiles. In this case, the first place is the requirement for the strength of the material with constant exposure to moisture and perfect alignment of the walls. The color of the plaster and the appearance of minor cracks does not play a significant role, since it is masked by tiles. Therefore, the use of cement-polymer and cement mixtures is justified.
A different approach is required when preparing walls for painting. With the help of paint it will not be possible to hide even the smallest defects, rather, they will manifest themselves more. Any minor cracking is not acceptable. Gypsum plaster fully meets these requirements.
In recent years, more and more preference has been given to moisture-resistant plaster for the bathroom, which does not require additional coating. This issue can be solved with the help of decorative plaster, which is produced in a waterproof version. The decorating effect can be achieved in different ways: volumetric texture, various colors, imitation of natural materials.
In bathrooms, it is not recommended to apply a layer with deep furrows (for example, the so-called bark beetle plaster), since microorganisms can multiply in them. Of the ready-made compounds, moisture-resistant plaster for the bathroom “Knauf” has proven itself perfectly (their price ranges from 350 to 730 rubles per 25 kg).
It looks very original combination of areas with decorative plaster and tile cladding. When creating an unusual interior, Venetian plaster is often used today. To increase the reliability of such coatings, it is recommended to cover them with a protective layer. The most common are wax formulations, for example, Optimist.
Experts recommend that in rooms with high humidity a little safety and use additional protection against the effects of moisture. This is achieved by applying a very thin primer layer from the Aquastop composition.
It is very necessary to choose moisture resistant decorative plaster for the bathroom. The price is sometimes crucial, but you should not save on these compounds, since inexpensive mixtures of unknown manufacturers do not always guarantee high quality.
Wall preparation
Before applying moisture resistant plaster, it is necessary to prepare the walls. First remove the old coating. For example, it is convenient to burn paint with a blowtorch. You can go the other way - to cover the surface with a special reinforcing composition. Be sure to check the walls for strength. If technical plaster is not holding well somewhere (and you will hear it by a dull sound when tapped), then it must be removed.
Large chips or potholes close up with a new solution. The preparation of the walls in the bathroom before applying the plaster implies a certain surface roughness in contrast to the preparation before other types of finishing, when they achieve the ideal smoothness of the wall. If the surface is too smooth, then it is necessary to make notches on it - they will provide good adhesion to the decorative composition.
Before starting work with plaster, the wall is treated with a degreasing compound and rubbed a little with a metal brush to get rid of dust.
Apply plaster
Wall decoration with moisture-resistant plaster involves the sequential application of three layers: base, draft and finish (protective). The base coat finishers are called spray. First, the wall surface is abundantly wetted with water. Then, until the moisture has absorbed, with the help of a small bucket, they collect a thick solution and throw it on the wall. The thickness of this layer should not exceed 0.5 cm. It can reach 1 cm if the surface is wooden.
Spray is made so that the solution covers the entire wall. In this case, do not level the mixture - it should solidify in its original form.
When the first layer dries, you can take on the draft layer. It must be leveled. For this, a spatula and trowel are suitable. Initially, a small amount of plaster is poured onto the surface, just like in the first layer. Then the composition is leveled. After this, it is necessary to smooth the surface with a wooden trowel, periodically wetting it with water. The movements should be circular. Check the surface with a level.
And finally, it remains to apply the final layer. They start it after the previous one dries. The wall is again moistened with plenty of water. Moisture-resistant putty is applied with a trowel, after which it is rubbed with a trowel to a flat surface. When working with a trowel, experienced plasterers recommend holding it at an angle of 20 °. This will facilitate the process, and the material will lie smoother. If you want to apply a decorative pattern, this is done immediately until the solution has solidified.
We examined the features of applying plaster to the walls in the bathroom. If you do everything right, you will get a beautiful and durable surface. The main thing is to choose the right material and knead the dry composition strictly according to the instructions that are indicated on each package.
Owner reviews
Most homeowners who used moisture-resistant plaster in the bathroom admit that they used this material on the advice of friends, neighbors, colleagues, etc. They say that they did not believe that with this material you can create a really stylish interior in the bathroom .
Moisture-resistant decorative plaster creates interesting textured surfaces of any shade. At the same time, it evens out small irregularities and wall defects, even without prior preparation. Many liked the decorative plaster also because after applying it and taking a shower or bath, the room does not fog up the mirror, due to the fact that the vapor is absorbed into the finish, and does not settle on cold and smooth surfaces.