Bathroom plaster - an overview of the best materials available

Bathroom plaster is suitable for both rough and fine finishing of the room. It can imitate a coating from other materials and carry a decorative function, but it must necessarily protect the walls from moisture and take into account other specifics of operating conditions.

Can plaster be used in the bathroom?

In a room with a huge humidity factor, when finishing, you have to choose liquid-resistant coating options for walls and ceilings. Bathroom plaster is recommended for use because it has a number of advantages:

  • excellent vapor permeability of surfaces;
  • lack of fogging of mirrors and absorption of excess moisture due to the hygroscopic properties of the finish;
  • ability to cope with temperature changes;
  • positive microclimate and lack of conditions for the development of the fungus.
  • can you use stucco in the bathroom

What is the best plaster for the bathroom?

The material used must have good sanitizing properties. Without going into the recipe and composition of this type of bathroom plaster, it must be said that it has greater strength compared to universal mixtures suitable for finishing any room. A dry sanitizing base has several advantages that outshine the advantages of cement-sand compositions:

  1. Bathroom plaster prevents the appearance of efflorescence on the walls — stains caused by a high concentration of salts in concrete. It removes excess water, which ensures the durability of the presentable appearance of the room.
  2. This material rarely cracks, even if applied in a thick layer.
  3. It is environmentally friendly and does not emit toxic substances during operation.

what is the best plaster for the bathroom

Wall decoration in the bathroom with plaster

The technology of using the mixture consists of several stages, which vary depending on the desired effect. The first of them remains unchanged — surface preparation — cleaning from dirt and remnants of old finishing materials. In the future, the plastering of the walls in the bathroom is carried out according to one of the following methods:

  1. Tile finish. A mixture of cement and plasticizer is applied in layers so that each of them has time to dry before facing with ceramic tiles.
  2. Paint finish. If you refuse it, then the paint will reveal all the deviations and defects of the walls.
  3. Decoration with decorative plaster for the bathroom. This is a finishing coating that is used for the purpose of designing a room.

plaster walls in the bathroom

Plaster under the tiles in the bathroom

After removing the old finish, the cleaned surface is primed to create a kind of film on their surface that improves the adhesion of substances and fills the pores of the wall in order to enhance moisture protection. The composition of the primer contains antiseptic agents that prevent the appearance of mold. The solution is applied to the walls in three layers:

  1. Starting splash. The surface is moistened with water using a spray gun or brush. With a trowel, the liquid mortar is thrown onto the walls with a layer of 5 mm or thicker. You don’t need to level it.
  2. Black grout. A thick mixture is applied to the starting layer and leveled. Gypsum plaster in the bathroom under the tiles is not used, because it crumbles and absorbs too much moisture — all the same cement-sanitizing compounds are applied instead.
  3. Finishing. At this stage, the coating is leveled to a thin layer of 2 mm. When it dries, you can start lining.

bathroom tile plaster

Bathroom plaster for painting

After sealing small cracks and a primer, putty is applied on an acrylic or latex basis with moisture-resistant properties. The plaster of the walls in the bathroom is used only after the extra bumps are removed with a grinder or sandpaper. It is applied in 2-3 layers with a break for drying. Each layer is primed — even the last one, which is applied before applying the paint.

bathroom plaster for painting

Waterproofing plaster in the bathroom

If, nevertheless, gypsum or another low-quality mixture was used, a water-repellent mixture will help protect against mold and fungi. It is called waterproofing and is laid between layers of plaster or under tiles. The primer should have a minimum level of moisture absorption and high breathability. Therefore, waterproof bathroom plaster is applied to one of the following mixtures:

  • latex or epoxy grout;
  • bituminous mixture;
  • silicone base.
  • waterproofing plaster in the bathroom

Plaster ceilings in the bathroom

Putty is the cheapest way to finish not only vertical, but also horizontal surfaces. It is not easy to take care of the ceiling, so bathroom plaster is ideal, if only because it does not need to be wiped with a dust cloth or subjected to total repairs after being flooded by neighbors from above, as it would be with a false ceiling. It is applied according to the following algorithm:

  1. First, a layer of old paint or whitewash is removed.
  2. The ceiling is checked for integrity. The best plaster for the bathroom is one that does not emphasize the differences in the plates, so it is better to rub them in advance with a starting putty.
  3. A final layer of plaster is applied, on top of which, if desired, paint can be used.

ceiling plaster in the bathroom

Bathtub stucco finish

The process of processing walls with putty is not much different from working with similar mixtures in other rooms. The existing differences appear at the last stage, at the moment when the finishing mixture is applied to the rough layer. To bring ideas to life, it is recommended to use one of three finishing techniques:

  1. Uniformly rough. The method involves applying a mixture of a special sponge or crumpled paper placed in a plastic bag. After drying, a decorative bath plaster with a relief resembling «goose skin» is obtained.
  2. Furrowed-rough. This is bark beetle finishing — the use of a mixture for the finishing layer with coarse-grained elements and grooves resulting from vertical smoothing with a trowel.
  3. Furrowed plaster for the bathroom. The method of imitation of brick or masonry is carried out using a special template or a special spatula for punching the relief on the surface of the wet layer.

bathroom stucco finish

Decorative plaster in the bathroom

Gone are the days when ceramic tile was the only design option for a room that constantly maintains a high level of humidity. Decorative plaster for the bathroom is a heterogeneous mixture, which, when dried, gives an interesting relief to the finished surface. In its manufacture, synthetic substances are used, and therefore it is able to withstand even prolonged exposure to moisture. There are three main types of decorative putty:

  1. Textured plaster — granular mass with the addition of pebbles, linen or cotton fiber, inert gypsum or fine sand.
  2. marble plaster — mineral composition with inclusions of large crumbs.
  3. Venetian cover — plaster for the bathroom, which is applied in layers with repeated grouting.

decorative plaster in the bathroom

Marble plaster in the interior of the bathroom

Durability, a wide range of colors and environmental friendliness are considered the main advantages of using mineral chips as wall coverings. Finishing the bathroom with decorative plaster will be exclusive because, after drying, crushed marble creates a unique pattern that cannot be repeated. This type of putty washes well and lasts 2-3 times longer than any other mixture. It is worth choosing it if some nuances were taken into account:

  1. It is sold ready-made, packaged in buckets of 30-35 kg: it is important to immediately calculate the exact amount of material needed, since it will not be possible to buy it in a small format.
  2. Before plastering it is necessary to apply a primer with quartz sand.
  3. The mixture with marble chips hardens within two hours, so it is quickly distributed with a wide spatula or stainless steel trowel.

marble plaster in the interior of the bathroom

Venetian plaster in the bathroom

The decorative multi-layer coating contains stone chips and slaked lime, but it has a more uniform texture. The surface of the finished wall resembles the pattern of marble or onyx for another reason: the mixture is carefully rubbed and dried until the desired pattern appears on it. Venetian plaster for the bathroom requires special skill to apply correctly:

  1. It is distributed with a flexible rubber spatula, in thin strokes in 5-6 layers, each of which is thoroughly dried.
  2. The mixture is tinted before work or gets a matte finish by mixing with suitable additives.
  3. Dyes that imitate precious metals can be mixed into it to refract colors and visually expand the space of the room.

Venetian plaster in the bathroom

Textured plaster in the bathroom

This is the name of putty, which has a coarse and highly viscous structure with natural filler. When answering the question of which plaster to choose for the bathroom, it is recommended as the most versatile type of coating used for decorating stone, concrete, brick and plaster walls. Textured putty has three significant advantages:

  • it hides large defects and irregularities;
  • surface preparation is not required for application;
  • the applied layer has a high hardness.
  • textured plaster in the bathroom



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