Moisture-resistant plaster: plaster for the bathroom - make a choice

Gusevsky Andrey Anatolyevich

Venetian - decorative moisture-resistant plaster suitable for bathrooms

The decoration of premises with difficult operating conditions must be treated very carefully, avoiding the use of materials that may not withstand the aggressive effects of moisture and temperature extremes. For example, in the bathroom it is not recommended to use gypsum putty or wallpaper - they will not last long. But cement and polymer moisture-resistant plasters are highly resistant to such influences. They will be discussed.

Leveling and decorative plasters

Moisture-resistant plaster mixes can be different both in composition and in purpose:

• Some are intended solely for leveling surfaces and their preparation for applying a decorative coating. For example, moisture resistant paint or tile.

Aligning the walls in the bathroom

• And the second ones themselves are decorative material that does not require subsequent finishing.

Note. Moisture-resistant decorative plaster for the bathroom is applied in a thin layer, therefore, with uneven walls, it requires the preparation of the base with leveling compounds.

Of course, you can even out the walls using sheets of moisture-proof drywall (seePlasterboard ceilings and walls: tips from the master) He will cope with this task perfectly, any coating can be applied to it, and it will serve reliably. But only until you are flooded by neighbors from above. This probability cannot be ruled out if you live in a high-rise building, so it is better to use more reliable materials.

Compositions for leveling

Alignment - this is the removal of the surface in one plane without drops, pits and bumps. The material used for this should adhere well to the walls and serve as a solid base for decorative finishes.

Since the humidity in the bathroom is high, plasters are used in it (seeLet's consider what plaster for a bathroom to choose.) moisture resistant, the main binder of which is cement or polymer resins. These are ready-to-use or dry mixes requiring mixing with water, the proportions of the components in which are carefully selected.

But gypsum plasters should be used with caution, since they can withstand such operating conditions only if the surface is tiled with carefully grouting the joints, eliminating the penetration of moisture under the lining.

Note. Moisture-resistant gypsum mixtures exist with special additives that make the plaster more resistant to moisture. But not to the direct effects of water! The instruction to them states that they can be used for plastering walls and ceilings in wet rooms.

If you nevertheless decided to use gypsum plaster (seeDry plaster gypsum mixture: features of use), as it is more convenient in operation and does not give shrinkage cracks, experts advise to play safe and protect the surface leveled by it with waterproofing materials of a coating type. However, during a flood from above, it will not save you, because water will penetrate the surface from the unprotected side.

The photo shows the process of applying a waterproofing coating

We offer you a comparative price analysis of the most popular plasters designed for wet rooms. Cost may change over time or depending on the region, so we recommend that you take it simply as a guideline for comparison.She is given for a bag of 25 kg.

The specified flow rate of the finished mixture is designed to create a leveling layer with a thickness of 10 mm

Water-repellent Profit Gidrofob plaster

Compositions for decorative finishes

If you need moisture-resistant decorative plaster for the bathroom for decoration, the selection criteria are the same: it is advisable to avoid gypsum-based compounds using cement and polymer mixtures. In principle, there is nothing complicated: you just need to look for moisture resistance on the packaging.

• This characteristic is possessed, for example, by the polymer coatings STUC DECO and STUC GRANITO, which can be given a different texture, acrylic plaster with the effect of “orange peel” Dufa Kratzputz aussen. They cost much more than leveling mixtures, but are applied in a thin layer, so 20 kg packaging is enough for 10-30 square meters of the surface.

Decorative coating STUC DECO in the wet zone

• Also for finishing bathrooms can be used Venetian plaster decorative moisture resistant. But it is desirable to cover it with a protective layer, which is often used as a special wax Optimist for plastered surfaces, creating a protective moisture-resistant film.

Tip. Venetian plaster is one of the most difficult to apply. Therefore, if you do not have experience, do not risk applying it yourself. Many other decorative compositions are much easier to work with.

Such a finish is good in that it creates a holistic seamless coating that is not inferior to tile in its strength and moisture resistance. In addition, both of these materials are perfectly combined with each other, allowing you to create an interesting and original design.

Chic neighborhood of tiles and stucco

The only limitation concerns the surface texture: it does not have to be very embossed. In hollows, depressions and grooves, water will surely accumulate and mold will appear. In addition, washing such a surface is very problematic.

Useful Tips

Do not hope that the moisture-resistant plaster for the bathroom will protect you from all the problems associated with high humidity and direct contact of water and detergents on the walls. You can count on this only if, in the process of carrying out the work, the finishing technology was strictly observed.

Namely:

• Both the base and the already dried plaster surface must be treated with a waterproofing compound (seeWet waterproofing primer) or a deep penetration primer;

• It will not be superfluous to treat with fungicidal agents that prevent the formation and development of fungal microorganisms, mold;

Tip. You can immediately look in stores primer with antifungal additives.

• If plastering is done on beaconsfixed on the walls with gypsum mortar, then when removing beacons after setting the plaster it is necessary to carefully clean the places of their fastening on the walls from gypsum;

Stucco walls on lighthouses

• If you are preparing a mortar for plaster with your own hands, do not spare cement, just follow the proportions recommended for this brand. Adding liquid glass to the solution will help to make the coating more durable and waterproof;
• If the walls are aligned under the tiling, try to do the job as efficiently as possible, not hoping that minor flaws can be corrected by the thickness of the layer of tile glue.

Conclusion

Increasingly, traditional tiles in the decoration of bathrooms give way to decorative plaster. But even under the tile it is necessary to level the base, and for this you can use only moisture-resistant plaster mixes. The basic principles by which they should be chosen, you know. And how the application process itself happens, the video in this article will tell.