Which plaster is better for the bathroom under the tile?

The bathroom is the most humid room in the house. In the design and construction of special requirements for waterproofing, but still the finishing materials must withstand water. The most popular finish is tile. Many stick it themselves, without resorting to the help of repair firms, but the wall must be prepared - plastered. About what the plaster is better for the bathroom under the tile, we now will tell.

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Why plaster?

The wall of the house is almost never smooth. For example, in the construction of a brick building, standards allow a deviation from the vertical of 15 mm by 2 sq. M.m. And now imagine that on this wall you have to paste a tile. She has no deviations in thickness, the surface adjacent to the wall is practically flat. Accordingly - if the wall is skewed, voids form under the tile. Fill them with glue is almost never possible, in addition, an additional large portion of glue can significantly increase the cost of repairs.

In addition, even the most skilled finisher can not put several rows of tiles so that the seams converge.

Important! On a non-plastered wall the tile will go at random. So the wall will have to be aligned with a special compound.

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Features of the tile

Why is tiles used for finishing bathrooms and partly kitchens? For several reasons, which include:

• strength;
• resistance to moisture;
• resistance to temperature changes;
• convenience of care;
• possibility to paste it yourself.

Important! In addition, manufacturers of construction products offer a lot of options for decorating bathrooms - the tile is of different colors, with a shiny or matte surface, a variety of textures. Tile panels with landscapes or genre scenes are very popular.

But the tiles have some features that must be taken into account when working:

• heavy weight;
• brittleness.

Important! Poorly executed training strengthens these features - under its own weight the tile begins to fall off. Places where there are voids are more sensitive to mechanical influences.

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Other finishes

In addition to tile, decorative plaster is used for finishing bathrooms. Its most important plus is the opportunity to show creative abilities. Modern materials make it possible to make the waterproofing very reliable.

However, there is one significant drawback - if you have never done decoration work, starting with this kind of work is hardly worth it. So, when asked which plaster is better for a bathroom, a beginner finisher will most likely give a definite answer - one that can be glued on.

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What do you want to achieve?

Before deciding which plaster to choose for the bathroom, think about what tasks the roughing is designed to solve.

• leveling of the surface under the tile;
• Finishing plaster.

Under the surface leveling is meant the preparation of the substrate for lining or painting. The choice of mixtures is not that big. Among other things, the rough finish should improve the waterproofing properties of the walls. There are three options:

• plastering with a cement mixture with the addition of hardeners;
• plastering with standard mixtures with preliminary impregnation with hydrostatic substances;
• plastering with a standard mixture followed by a layer of waterproofing.

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What is plaster for tiles?

Certain requirements are imposed on the plaster under the tile. It should be:

• moisture-proof;
• strong;
• resistant to temperature changes.

The frozen mixture should not be destroyed under the influence of water, which is always present in the bathroom. With regard to strength, the composition should withstand the weight of the tile well. In addition, the glue that glues the tiles has the property of shrinking, which again can lead not only to the peeling of a fragment, but also to the destruction of the layer of roughing. Therefore, it is necessary to consider carefully what kind of plaster is best for a bathroom under the tile.

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Ready or homemade mixes?

Regardless of what the mixture is made of, it is sold in the store in one of two variants:

• ready;
• is dry.

In the first case, the manufacturer has already taken care that you do not have any trouble with the preparation. The mixture is already diluted in liquid and has the desired consistency. The dry mix is ​​diluted with water, and it is necessary to do it strictly according to the instructions:

• Too thick composition is not plastic enough, you will have a lot of trouble with alignment.
• If the mixture is too liquid, it will drain and congeal.

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What are the mixtures?

In construction shops you will be offered several types of building mixtures, seemingly appropriate to your goals. But still - what plaster to choose for a bathroom under the tile? All compounds can be divided into two classes:

• on a cement basis;
• on a gypsum base.

Cement

The most popular material for rough finishing of the bathroom is certainly cement. It has a number of advantages:

• strength;
• ability to provide good waterproofing;
• resistance to mold;
• good vapor barrier properties.

Important! The disadvantage, which must be taken into account when planning repairs - the cement composition hardens very long. Tiles can be applied not earlier than a month after plastering.

Such mixtures are inexpensive, if desired, you can buy separately cement and sand, and, not necessarily in the store - you can turn to, for example, a plant for dry construction mixtures, where the purchase will be much cheaper.

Important! Make sure that there is no lime in the composition - it, of course, will make life easier for the builder, but will worsen the waterproofing properties of the material.

Note the size of the fraction:

• For a rough stone or brick wall, a composition of cement and coarse sand is suitable.
• For smooth panels it is better to use fine-grained quartz sand.

After the plastering with cement mixture, it is possible to finish with tiles only - other options will not work.

Gypsum

Gypsum compositions differ from cement. They can give a good waterproofing, although they are more sensitive to moisture and temperature. In addition, before gluing the tile, the wall must be primed. But before applying soil, the surface can not be cleaned.

In the shops you will be offered several mixtures, representing them as moisture resistant. But keep in mind that the gypsum itself, no matter what to add to it, perfectly absorbs moisture and thus loses its strength. So you should buy only the compositions from the proven manufacturers, where the content with the guarantee corresponds to the data on the package.

Important! In modern plasters add plasticizers or antibacterial additives, which makes them more durable and resistant to fungus.

Dry Putty

This is a modern material that is often called simply "Ceresite" or "Knauf" by the manufacturer's name. In it, in addition to the base, added plasticizer, as well as glue.

Dry plaster has undoubted advantages over a simple cement mix:

• does not crack when dry;
• with finishing works even the beginner will cope;
• dries quickly;
• does not shrink when dry.

Important! To repair an apartment this is an ideal option. The material has an increased resistance to moisture, while it costs not much more expensive than cement or gypsum. This kind of decoration is called conditionally decorative - you can paste a tile on a dry putty, but nothing prevents using it as a final finish.

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Manufacturers of

There are many companies on the building materials market, both known and not. It is always better to give preference to brands that have proved themselves well - they guarantee that the materials in their building mixtures are of high quality.

Which plaster is better for a bathroom under the tile, which brand?

• Profit;
• Ceresit;
• Remstrim;
• Manma;
• Knauf.

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Plastering works

The entire plastering process includes several stages of work. We will deal with them in more detail.

How much mix do you need?

Before you start repair, you need not only to decide which plaster is better for the bathroom under the tile, but also to determine the amount. First you need to calculate the thickness of the layer. This is done with the help of lighthouses.

Important! Lighthouses are installed on the entire wall - they must be at least three per square meter.

Put beacons

To install beacons you need:

• level;
• plastering rule for the length of the wall;
• straight rail.

Take the mixture on the same basis as the one you are going to trim the walls. In this case, it should quickly solidify. You can use the repair composition with the plasticizer:

1. Mark the places for the beacons strictly according to the level.
2. Lighthouses are gadgets measuring about 5x5 cm, with a thickness equal to the thickness of the future layer.
3. Set the second row of lighthouses, also in level.

Important! Mix gypsum and cement is undesirable.

Count the number of

Then proceed as follows:

1. Accurately measure the thickness of the beacons.
2. Find the average arithmetic value of the thickness of the beacon - add all the thickness values ​​and divide by the number of beacons.
3. Calculate the area of ​​the wall, multiplying the length by the height.
4. Multiply the result by the average thickness of the beacon - you will get the total volume of the layer.
5. Find on the package a ready-made mixture of its density.
6. Multiply it by the volume.

How do I apply a black plaster?

Before plastering the wall, the surface must be carefully prepared:

• Remove any broken pieces.
• Seal the cracks with repair parts.
• Beat the bulges.
• Apply a layer of hardening primer.
• Apply a layer of plaster - it should not be thicker than 3 cm.

Important! If you need a thicker layer, apply it in two steps, laying reinforcing steel mesh between the layers.

• As a result, you will get a smooth, but not necessarily perfectly smooth surface.

Important! The wall must be strictly vertical with an error of no more than 2 mm.

• To too smooth places, apply a notch.

Important! In the right places, make additional waterproofing with a cement-polymer mixture, applying it where there will be a bath or a shower.

Waterproofing compounds

There are two types:

• roll;
• Lubricating.

The second option is more convenient and stronger, so it's better to choose it.

Important! In old houses, bath walls were often painted with oil paint. If possible, it must be removed. If it is on varnish, the layer should be simply knocked down or treated with a special primer for smooth walls.

Expert Advice

So, you have decided what kind of plaster is best for the bathroom under the tile, and even prepared the wall. The time has come to do the composition. Of course, you will find all the necessary information on the packaging. But there are some subtleties that need to be considered:

1. To dilute the mixture, take clean water that does not have impurities.
2. The water temperature should be room temperature, unless otherwise specified in the instructions.
3. The mixture is poured into water, constantly mixing the composition, until you achieve the desired consistency.
4. Prepare as many mixes as possible so that you can spend all of it in half an hour.
5. Plastering the brick walls, do not forget about filling the seams.

Plastering

Plastering is, of course, not the easiest, but also not as difficult as it might seem at first glance:

• Brush the wall with water with a brush, roller or spray.
• Sketch the composition on the wall.
• Align with a trowel to create a 5 mm layer.
• If the wall is wooden - the layer must be at least 9 mm.

Important! At this stage, to achieve an ideally smooth surface is not necessary - just align the layer.

• The main layer can be applied to both the newly prepared surface and to the old one that meets your requirements. It is applied in the same way as the first. The thickness should not be less than 5 mm.
• The finishing layer is applied in the same way as the first two, but just before gluing the tile. The surface should be moistened with water, the layer applied and leveled with a spatula at an angle of approximately 20 °.The layer should not be more than 2 mm. After complete drying, you can proceed to the lining.

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Decorative plaster

Although it is somewhat difficult for a beginner to work with decorative plaster, it is still worthwhile to talk about this kind of finishing finish.

The main advantages of decorative plaster:

• versatility;
• strength;
• resistance to moisture;
• ease of preparation of mixtures;
• is easy to use.

Important! Decorative plaster can be used in all types of rooms, including kitchens and bathrooms. The composition is flexible, which makes it possible to obtain smooth surfaces using the most common spatula. Modern mixtures are very durable when dry, they do not crack from temperature changes. Among other things, this finish gives a very good antifungal and antibacterial protection.

Types of decorative coating for bathrooms

To help create a unique interior in the bathroom can a decorative mixture with a smooth or fine-grained structure. They are of two types:

• invoicing;
• is Venetian.

Textured plaster

One of the most practical types of wall covering. Such mixtures include astringent base and various fillers:

• cotton fibers:
• wood fibers;
• mineral crumb;
• small pebbles.

Important! After the plaster is applied and dried, the walls take on an original appearance, as if they were covered with silk or original wooden panels.

The composition of the mixture resembles a liquid wallpaper, is done on the same principle, but the base is used for production, resistant to moisture( for liquid wallpaper - on the contrary, a base is used that is easy to soak to use the material several times).

Important! If you are tired of the color of the walls in the bathroom - a surface covered with textured plaster, you can safely paint any waterproof paint. This material is sold in plastic cans of 15 or 20 kg. The instructions say which tool it is better to apply - a roller or a grater.

Venetian

A special kind of textured plaster with high water-repellent properties is Venetian. It is used not only for the treatment of walls, but even for the decoration of pools. Of course, the very font is not covered, and the sections of the walls directly adjacent to it, it is better to cover with tiles or glass panels.

Important! On the texture of the wall, decorated with Venetian plaster, resembles a natural stone - marble or granite.

Apply this mixture in several steps, each layer being made thin, almost transparent. The last layer must be made perfectly smooth.

In this article we have considered all the subtleties of choosing a plaster for a tile in the bathroom, and not only for tiling, but also as a separate decorative solution. We hope, now you have definitively decided on the design of your bathroom, and the idea embodied in life has surpassed in reality all your expectations for all characteristics.