Insulating plaster for interior use. DIY warm plaster work

The construction of a warm and comfortable country house requires solving often very complex and contradictory tasks. For example, to save on materials and, at the same time, not to increase your costs in the future when operating the house, to make the house warm and comfortable. Warm plaster can help in solving such a problem.

A somewhat unusual name accurately reflects the purpose of the material. At its core, it is a building mixture with thermal insulation properties. She acquires them through the use of materials with low thermal conductivity. The composition of warm plaster is usually as follows:

• porous filler - expanded polystyrene granules, perlite sand, foam glass (expanded glass), etc.;
• a binder mixture, which is usually cement, lime, gypsum and their mixtures;
• polymer additives - plasticizers, hydrophobizing, air-releasing, etc.

Familiarization with the composition of warm plaster allows you to understand what its good thermal insulation properties are based on. This is due to the presence of a porous filler, literally filled with numerous air bubbles. And he, as you know, is a good heat insulator. So it turns out that after applying warm plaster to the wall, it turns out to be, as it were, protected by an additional layer of heat insulator.

Properties of insulating plaster

The advantages of warm plaster are not limited to thermal insulation. The very composition of the mixture suggests what possibilities this material conceals in itself.

1. Fire safety. Warm plaster with mineral filler (perlite, vermiculite, foam glass) is generally non-flammable and belongs to the NG class according to the classification system. The exception is heat-insulating plaster based on expanded polystyrene foam, it is combustible and belongs to the G1 group.
2. Ecological cleanliness. Traditional insulation materials (mineral wool, polystyrene) emit harmful substances, which is not the case with warm plaster.
3. Multifunctionality. In addition to the thermal insulation coating, warm plaster can serve as a material for decorative finishing and used as a topcoat. At the same time, it can be used to level surfaces.
4. Thermal insulation characteristics. It should be noted that heat-insulating plaster is not inferior in its properties to traditional materials. A layer of such plaster 5 cm thick is equivalent to laying two bricks or two to four centimeters of expanded polystyrene.
5. Physical characteristics. Heat-insulating plaster is much lighter than traditional plaster and during installation has practically no additional effect on the foundation and walls. In addition, it has high adhesion to all wall materials.
6. Practical use of warm plaster- it is easy to work with it and this does not require special qualifications.

About fillers

In many ways, the properties of insulating plaster are determined by the type of filler. The filler can be:

1. Sawdust. When using them, the cheapest, but least effective type of warm plaster is obtained.
2. Expanded polystyrene. Foamed polystyrene has good sound and heat insulation characteristics, has good adhesion. But this is a combustible material and at the same time it releases toxic substances.
3. Perlite is a material obtained from volcanic glass (obsidian) heated to 1100 ° C. At this temperature, obsidian begins to swell, becomes porous, a large number of air bubbles form in it, as a result of which the material acquires thermal insulation properties. Thanks to them, it finds application in various materials as an additive that provides these characteristics. One of the use cases is called perlite plaster.
   The disadvantage of perlite is considered to be high hygroscopicity, which requires the use of additional materials to protect it during finishing.
4. Vermiculite. Mineral belonging to the mica group (the so-called intumescent mica). Materials based on it are able to withstand temperatures from minus 260 to plus 1200 degrees Celsius. During firing, it significantly increases in volume (up to 50 times), resulting in flaky particles. By its properties, vermiculite is similar to perlite, it is absolutely non-flammable and non-toxic.
   The disadvantages of a mixture in which vermiculite is used as a filler are the same as for perlite plaster - high hygroscopicity, which requires additional costs for protection.
5. Foam glass. This is foamed silica sand, the structure of which includes closed glass cells. Foam glass is a waterproof and fireproof material, very durable and does not shrink, does not need additional protection. However, thermal insulation plaster based on it is inferior in its characteristics to materials using perlite and vermiculite.

About application and protection

Warm plaster is used for indoor and outdoor use. As already mentioned, due to the porosity of the filler, air bubbles act as a kind of insulation. Moreover, warm plaster is usually used as an additional element of thermal protection, and allows you to save on heating in the winter and air conditioning in the summer.

The point is that insulating plaster will be applied in addition to the protection laid down in the design of the building. It is irrational to use it as the main protection. According to calculations, with a brick wall thickness of 51 cm, the insulating plaster should have a thickness of ten centimeters, with a smaller wall thickness, the thickness of the layer of insulating material should be even greater.

However, when using modern building materials (ceramic blocks, foam concrete), it is quite possible to reduce the required thickness of the plaster, since these materials, unlike bricks, themselves have good heat-shielding characteristics. However, even in this case, warm plaster will be useful precisely as an additional protection, increasing the overall thermal resistance of the building.

Options for obtaining thermal insulation plaster

For interior decoration, such material is convenient to use in places with a complex configuration, as well as to increase overall thermal protection. By the way, it is quite possible to make a mixture for additional thermal protection yourself. Do-it-yourself warm plaster can be obtained in the following way:

• it is necessary to mix three parts of sawdust and one part of cement;
• then add two pieces of paper pulp;
• add water;
• the resulting mixture must be mixed to the state of a normal solution.

If it is to be applied to wooden surfaces, then it is necessary to fill the shingles, otherwise the material will not stick to the surface. A brick or concrete base must be pre-moistened before applying plaster to it.

The warm plaster obtained in this way, the reviews of which those who used the described method of obtaining are very positive, resemble cardboard in appearance. Its heat resistance is four times higher than that of ordinary plaster

Another method of making warm plaster with your own hands differs from the above, and gives a universal material suitable for indoor and outdoor use. To do this, use:

• cement, 1 part;
• vermiculite or perlite, 4 parts;
• plasticizer;
• water.

All components are on sale, PVA glue can serve as a plasticizer, fifty to sixty grams per bucket of cement. Everything is prepared very simply. First, PVA glue is diluted in water, then it is necessary to mix dry cement with a filler and add water with a plasticizer, achieving a thick but plastic mass.

After the mixture is ready, let it stand for 15 minutes, stir again and you can start working. Such insulating plaster, the reviews of which those who used it are commendable, are successfully used in various options for interior and exterior decoration.

Industrial materials

However, in addition to the possibilities of self-production, you can use the finished product. The industry successfully produces various types of similar material, for example, Knauf Grünband thermal insulation plaster. It is a plaster mixture (dry), intended for all types of work, based on sand, cement, filler in the form of expanded polystyrene (granules) and hydrophobic additives and has water-repellent and thermal insulation properties.

Another option could be Haunkliff insulating plaster. It includes a composite filler (manufactured by the manufacturer), basalt fiberglass, sand, cement, polymer binders.

Warm plastering

A mixture, such as warm Knauf plaster, must be diluted before application. Dilute the entire volume (bag), observing the dosage and stirring time specified in the instructions. The result should be a plastic, lump-free mixture. She is ready to go in a few hours.

The surface must be cleaned of dirt and dust before applying the material to it; plastering can be done at a temperature not lower than + 5 ° С. Apply the ready-made mixture with a spatula and level (rub in) with a grater or rule.

The thickness of the layer is not recommended to be made more than 2.5 centimeters, if you want to get a greater thickness, then you need to make several layers in succession. The surface can be painted after two or three days. After 28 days, the layer acquires maximum strength, and the thermal insulation ability will reach its maximum value 60 days after drying.

As soon as the composition of the usual one was slightly changed, a completely new material was born - warm plaster. Manufacturers attribute unique qualities to it and declare that the material can be used as an independent one. So what is it true or just another clever marketing ploy? How to choose the right warm plaster for the facade and interior work, how to apply it, and in what cases can the material really be used as a full-fledged heat insulator?

# 1. Warm plaster composition

Warm plaster was named for its low thermal conductivity compared to conventional plasters. Similar results were achieved by replacing the usual with special heat-insulating additives.

The composition of warm plaster includes such components:

Usually the material is supplied in the form of a dry mixture, and it is enough to dilute it with water before application. Craftsmen prepare warm plaster on their own, but the composition "works" in any case according to one principle: heat-insulating additives, together with air bubbles, create a powerful barrier to cold. Tests show that a layer of warm plaster of 5 cm is equivalent in thermal insulation to a wall of two.

The coefficient of thermal conductivity of the material is about 0.063 W / m * 0 C. This indicator is slightly worse than that of extruded polystyrene foam and even, which brings some features to its application. In regions with cold winters, warm plaster cannot be used as an independent thermal insulation - it is usually applied as an additional layer of insulation and plays an important role in eliminating the "cold bridges" that arise during the installation of tile and roll insulation. In areas with mild winters, warm plaster can even be used as the only insulation material, but much depends on the thickness and material of the walls. In the future, we will check all this by calculations.

No. 2. Advantages and disadvantages of warm plaster

Warm plaster has become widespread due to its weighty advantages:

Now about disadvantages:

No. 3. Types of warm plaster fillers

The properties and scope of use of warm plaster are strongly influenced by the type of filler. The following materials can be used:

• sawdust... The composition of sawdust warm plaster, in addition to the sawdust itself, also includes clay, paper and cement. The use of such "delicate" and sensitive to negative factors of the external environment components does not allow using the composition for insulation of the facade, but such warm plaster is excellent for interior work, especially since it can be applied even to a wooden base. Internal thermal insulation will improve efficiency;
• crushed perlite obtained from obsidian, which, during high-temperature processing, swells with the formation of a mass of air bubbles inside, which increases the thermal insulation properties of the material. The only negative is increased hygroscopicity, so such plaster needs reliable waterproofing;
• expanded vermiculite obtained from mica, the material can withstand a wide range of temperatures, has antiseptic properties, is lightweight, absolutely resistant to fire, can be used for exterior and interior decoration, but, like perlite, it is afraid of moisture, therefore, requires enhanced protection;
  
• balls from foam glass obtained from foamed quartz sand. It is the most preferred material for filling warm plaster, as it is not afraid of moisture, fire, has good thermal insulation qualities, can be used for facade and interior work, does not shrink;
• as mineral fillers, in addition to vermiculite, perlite and foam glass, are also used expanded clay crumbs and pumice powder... These materials cannot boast of high moisture resistance and are inferior to analogues in many other qualities, therefore they are rarely used;
• expanded polystyrene used in warm plasters together with cement, lime and some other additives. These are relatively inexpensive compounds for universal use, but due to the flammability of expanded polystyrene, they are not used so often. In addition, the surface of the plaster comes out too soft, and therefore requires mandatory finishing.
  

No. 4. Calculation of the thickness of the layer of warm plaster

To determine whether it is possible to use warm plaster as an independent insulation, you will have to perform a simple calculation, taking into account the region where the house is located, the thickness and material of the walls:

• the calculation begins with determining the value normalized resistance to heat transfer of the outer walls of the house... This is a tabular value, predetermined by regulatory documents (for Russia - SNiP 23-02-2003). For Moscow, according to the table, this value is 3.28 m 2 * 0 C / W, for Krasnodar - 2.44 m 2 * 0 C / W;
• define resistance to heat transfer of the walls of the house, for which we need to divide the thickness of the wall by the coefficient of thermal conductivity of the material. Let's make a calculation for two houses. One is located in Moscow and is built of, the thickness of the walls is 0.5 m, the thermal conductivity coefficient from the table is 0.58 W / m 0 С, therefore the heat transfer resistance is 0.86 m 2 * 0 С / W. The second house is located in Krasnodar and is built from D600, the wall thickness is 0.4 m, the thermal conductivity coefficient from the table is 0.22 W / m 0 C, the heat transfer resistance is 1.82 m 2 * 0 C / W;
• payment additional insulation... For a house in Moscow, this is (3.28-0.86) = 2.42 W / m 0 C. For a house in Krasnodar (2.44-1.82) = 0.62 W / m 0 C;
• payment a layer of warm plaster, its thermal conductivity coefficient is 0.063 W / m * 0 С (maybe a little more, depending on the composition and manufacturer). For a house in Moscow 0.063 * 2.42 = 0.15 m, for a house in Krasnodar 0.063 * 0.62 = 0.04 m.Since it is better not to apply warm plaster with a layer of more than 5 cm, and its weight is decent, then for a Moscow house, it is better to look for another option for insulation, and warm plaster can be used in addition. For a home in Krasnodar, warm plaster can be used as an independent insulation.

A more accurate calculation can be carried out if we take into account the heat transfer resistance of all finishing wall materials, and also take into account the number and size of windows and the mass of other parameters. It is easier to do this in special construction calculators, but you can already understand whether it is worth considering warm plaster as an independent insulation from the above calculation.

Despite the manufacturer's assurances and calculations proving the effectiveness of warm plaster, it is not very often used as the main insulation in residential buildings. She usually, dachas, is used to eliminate cold bridges, to process window and door openings. It is better to use insulation outside, but if this is not possible, it can be applied inside to complement the external insulation.

No. 5. Warm plaster manufacturers

You can save and make warm plaster with your own hands... The most versatile and inexpensive solution is obtained using perlite or vermiculite. It is necessary to mix 4 parts of vermiculite or perlite and 1 part of dry cement. The thoroughly mixed mixture is diluted with a solution of water with a plasticizer. The latter can be purchased at the store, or can be replaced with PVA glue at the rate of 50-60 g of glue per 10 liters of plaster. The mixture is diluted with a water-based adhesive and constantly stirred for homogeneity. The solution should have a thick consistency. After cooking, he is allowed to brew for 15-20 minutes, and you can start applying the plaster.

No. 7. Applying warm plaster

The process of applying warm plaster is simple and easy to do with your own hands:

• the required amount of solution is being prepared;
• the wall is also cleaned for better adhesion, but many builders simply moisten the surface with plain water;
• it is better to carry out the plaster on the lighthouses, although some neglect this rule. As beacons, an aluminum profile is used, which is fixed with putty, the use of prepared plaster is allowed. The evenness of the exposed beacons is checked by the building level;
  
• modern ready-made compositions of warm plasters make it possible to do without additional mesh reinforcement, but when applying a thick layer of insulation and at the corners, the use of a mesh is desirable;
• the process of applying warm plaster is not original and identical. The solution is placed on the trowel with a spatula, after which it is applied to the wall with rubbing movements from bottom to top between the beacons. The surface is leveled by the rule;
  
• within 2 hours after application, the solution remains plastic, so blemishes are easy to fix. During this period, the lighthouses are removed, the cracks are rubbed with the same solution. If desired, the surface can be treated with a decorative trowel or textured roller to achieve an interesting effect. If a flat surface is required, then after the plaster has dried, it is necessary to apply a thin leveling layer and smooth it with a plastic float;
  
• the thickness of one layer should not be more than 2 cm, otherwise the plaster will begin to fall off. If it is necessary to apply it in several layers, then after installing the first one you must wait at least 4 hours. The surface dries completely after 48 hours, then you can proceed to its final finishing. If it is necessary to process a large area of ​​the wall, then it is better to use the machine method of applying plaster.

Warm plaster is used today for, for outside and inside, for insulating facades and ceilings, as well as for sealing cracks and cracks, for processing window slopes. With the right preparation, application and calculation, the composition fully meets expectations.

In construction, two main methods are used to insulate the outer walls of structures - the construction of false walls with further filling of the resulting space with insulation or pasting the outer surface with foam sheets. Due to the simplicity of installation work and low cost, such insulation methods attract attention. When for some reason it is impossible to use such thermal insulation options, apply warm plaster for outdoor work. Such material appeared on the construction market relatively recently, but due to its high cost it has not yet become widespread.

Types of warm plaster and its composition

The finishing material is made on the basis of cement, and as a filler, most often, foam granules, expanded clay crumbs, crushed pumice or perlite sand are used.
The most versatile type is plaster with filler and s expanded vermiculite, obtained during the heat treatment of the rock of the same name. A good option is warm plaster for outdoor work, masonry can be done with your own hands. Material with mineral filler can be used for interior and exterior finishing works, moreover, it has a pronounced antiseptic effect.
Sawdust plaster consists of clay, sawdust, paper fragments and cement. Due to this composition, the material is suitable for finishing external surfaces. If sawdust plaster it is used for interior work and is applied to concrete or wooden walls, then during the drying of the plastered surfaces, it is necessary to ventilate in a timely manner - this will help to avoid the formation of fungi and mold. It should be noted that the period of complete drying of the walls can last up to 2 weeks.


For interior decoration, plaster, which includes expanded polystyrene, lime, cement and other components, is considered the most suitable and reliable type of building material. This is the most common option for a finishing material, so it is worthwhile to dwell in more detail on the description of its characteristics. However, it is worth remembering that warm plaster for outdoor work with your own hands must be clearly master of the technology.

Using warm plaster

Such material is used not only for exterior decoration, but also for thermal insulation:
floor and interfloor floors;
window and door slopes;
basement of the building;
cold and hot water supply risers;
for blocking the joints of floors and walls;
making the interior walls soundproof;
to increase the thermal insulation of walls erected using the well masonry technology, which is popular today.

Comparison of material with traditional insulation

First of all, attention should be paid to the effectiveness of applying a layer of material to the facade of the building. For clarity, let's make a comparison with a surface insulated with foam sheets or mineral wool, followed by a layer of plaster on top of them. The comparison will be carried out in three directions: density, moisture absorption and flammability.
During the analysis, it was found that warm plaster 10 times heavier other thermal insulation materials, this means that due to the heavier walls, you will have to take care of laying a more reliable foundation.


To obtain indicators of heat conservation, similar to those given by expanded polystyrene or mineral insulation, a layer of warm plaster will have to be applied 1.5-2 times more densely. Based on the calculations made, it was established that the layer thickness should be 100-200 mm, with a recommended maximum of 50 mm. It is not difficult to guess that you will have to apply plaster to the outer and inner surfaces of the walls. In the future, the walls will need to be processed primer and decorative putty... Such warm plaster for outdoor use with your own hands has a number of distinctive properties.
Follow the main advantages of warm plaster can be noted:
the option of applying to uneven surfaces;
high speed of plastering walls;
the possibility of applying without the use of a reinforcing mesh;
good adhesion (compared to other finishing materials);
lack of metal components that can become "cold bridges";
impossibility of surface damage by rodents after finishing.

Material application technique

The technology for performing finishing work using warm plaster does not differ much from the method for applying ordinary plaster.
First of all, you need clean the surface walls from debris and dust, treat it with deep penetrating impregnations. In addition, experts recommend using a special plaster grid... The wall surface should be well moistened before applying a layer of warm plaster.
Usually, the entire package of dry mix is ​​used for preparation, but it is important to note that the ready-made solution should be used within 2 hours. You can apply the composition mechanized way or manually... If, when turning over, the trowel scooped up the composition holds well, then the warm external plaster has a good consistency and is ready for use.
Since the composition is applied in layers, you will need the simplest tools:
putty knife;
Master OK;
grater.
The thickness of each layer should not exceed 20 mm. In this case, it is important to apply the next layer after the previous one has completely dried, that is, after about 4-5 hours. Duration drying period depends on humidity and ambient temperature, so it may take a little longer. The mixture is applied to the wall with a spatula, in smooth movements from bottom to top. If too much plaster is applied to the surface, it will start to creep.


Time will help to ensure the quality of the work. After a few weeks, you need to inspect the surface of the walls and, if mistakes were made, they will appear in the form of swelling, cracks and geometry changes premises, which is checked using a building level or a plumb line. At the same time, a horizontal and vertical deviation of no more than 3 mm is permissible for 1 running meter.
Due to the fact that the thickness of the warm plaster layer does not exceed 50 mm, and the surface does not have fiber, the statement about sound insulating properties material. Moreover, the finishing material does not have elasticity, which will be sufficient to extinguish pops, harsh sounds and knocks.

Before applying warm plaster, the surfaces must be cleaned, the weak layers of the previous finish must be removed, a primer must be applied. The mixture is applied to the wetted walls and ceiling so that they do not draw moisture from the solution.

Warm plaster for the facade and interior decoration is applied with a minimum layer of 25-30 mm, a reinforcing frame is required. If a thicker layer is required, then the solution is applied in 2 doses. Full formation of the layer is 4 weeks.

If the walls are not porous, smooth, for example, monolithic concrete or sand-lime brick, a reinforcing mesh is required. A layer of up to 30 cm is enough synthetic cloth, more - it is better to use a chain-link.

To comply with the geometry, work should be carried out along the beacons

For porous materials, warm plaster for aerated concrete, brick, foam concrete is applied in 2 stages. The first layer of a more liquid solution is required - spraying (1 hour cement: 1 hour sandstone: plasticizer according to the instructions: water to medium sour cream), this will help improve adhesion.

Insulating plaster for interior work under the tiles is prepared in a special way. A polypropylene mesh is mounted on a quick-drying mortar (glue), then it is nailed with long dowels to the load-bearing walls through the entire thickness of the leveling layer. And only after the glue is completely dry, you can make the tiling.

Warm facade plaster is easy enough to grind, you can treat the surface with an abrasive, primer and paint with paint for outdoor use, based on silicone or silicate. All types of ventilated facade systems can also be used with this type of finish. But decorative plaster and tiles for outdoor use on warm plaster are not recommended.

Methods for grouting mortar

Warm plaster for interior work is a very unusual and new building and finishing material for many, which appeared relatively recently on the domestic market. Accordingly, it is quite natural to consider the question of what kind of building mixtures - warm plasters - and how to use them.

Warm plaster composition

Warm plaster for interior work is a dry mix based on ordinary cement. The difference from the classic solution is the absence of sand in the composition. It can be replaced by any other components:

• Perlite sand.
• Expanded clay chips.
• Powder obtained from pumice.
• Expanded polystyrene granules and other materials.

Varieties of warm plaster

There are several varieties of warm plaster. Construction mixtures differ in composition, scope, application method and technical and operational characteristics.

The most popular are the three below.

Warm plaster with expanded vermiculite

Expanded vermiculite is a light mineral aggregate obtained by heat treatment of vermiculite rock. Warm plaster with the addition of such a component is used mainly for outdoor work. Despite this, it is also possible to use it for interior decoration - it is a versatile building material. The advantages of warm vermiculite plaster include excellent antiseptic properties.

Sawdust plaster

Warm plaster for interior work, which is especially popular and not intended for exterior decoration - the so-called sawdust mixture. It contains sawdust, particles of cement, clay and often paper. Actually, it is for this reason that it is not used for outdoor work.

This mixture is ideal for use on wood and brick surfaces. The applied layers of plaster should dry out only if the room is well ventilated. Complete drying takes about two weeks. In a closed room, fungus and mold can develop on the surface of the plaster.

Plaster with expanded polystyrene granules

Another good type of plaster is a mixture with the addition. Its composition, in addition, includes cement, lime, various additives and aggregates. It is used mainly for outdoor finishing work, but it can also be used for interior decoration.

Stucco with expanded polystyrene granules is the most common, in contrast to the other two types.

Scope of warm plaster

Today dry mixes of this type are used in the following areas:

• Building decoration and thermal insulation.
• Additional insulation and sound insulation of external and internal walls of buildings.
• When using well masonry - wall insulation.
• Insulation of sewage, hot and cold water supply risers.
• Insulation of window blocks and slopes in the places where they adjoin the walls.
• As a heat-insulating and sound-insulating material for interior finishing works.
• Experts advise using warm plaster as a material for insulating floors and ceilings.

Benefits of warm plaster

• Fast application of plaster - in a day, you can cover a surface of 110-170 sq. m.
• Does not require the use of reinforcing mesh.
• There is no need to level the walls if warm interior plaster will be used.
• The mixture has excellent adhesion to all types of surfaces.
• There is no risk of occurrence since there are no metal bonds.

disadvantages

• The mixture does not belong to the category of topcoats and requires the application of not only a primer, but also a layer of decorative plaster.
• Unlike cotton wool or foam, the thickness of the insulation with a warm composition is several times greater.
• Plaster is not quite economically consumed - the price for it, by the way, is not so low.

Where should you use warm plaster?

Based on all the pros and cons of this dry mixture, it is best used for the following work:

• Sealing joints and cracks in floors and walls of buildings.
• For internal work in the case of additional insulation, for example, when it is impossible to carry out insulation procedures outside the building, a cladding is installed, which will deteriorate during disassembly.
• Finishing of window slopes.
• Insulation of the basement.

Warm plaster application technology

Before applying this type of dry mix, prepare the substrate in the same way as before applying conventional cement-based plaster. Remains of other materials, dust and dirt are carefully removed. If necessary, the surface can be treated with special compounds or a primer in order to strengthen and improve adhesion.

An important requirement - before starting work on the application of plaster, the base must be thoroughly moistened with water.

Sequencing:

1. The dry mixture is poured into a container prepared in advance with a volume of at least 50 liters.
2. Pure water is added in the amount indicated on the plaster package.
3. Using a construction mixer, the mass is mixed.
4. The ready-mix has a lifespan of 120 minutes.

It is very simple to check the consistency of the resulting mixture - a small amount of the solution is collected on a trowel, after which the tool is turned over. A well-mixed mixture should not fall off of it. The finished plaster can be applied both manually and by machine.

• Warm plaster is applied to the surface of the base with special construction tools in several layers, and the layer thickness should not exceed 2 cm.
• Each subsequent layer is applied 4 hours after the previous one.
• Drying time for each coat may vary depending on the level of humidity in the air.
• Apply warm plaster with upward movements.
• Checking the applied layer is carried out three to four weeks after all work has been carried out.
• The full set of strength of the plaster occurs within one to two months.

Errors when applying warm plaster

During interior finishing work using warm plaster, certain mistakes can often be made, especially if they are not carried out by specialists. As a result, delamination, cracks or changes in the geometry of the entire room may appear due to a too thick applied layer.

The quality is checked quite simply: for this, a rail rule is applied to the surface. If there are gaps between the tool and the wall, there are geometry violations.

When applying plaster, the most important thing is to avoid deviations from the vertical or horizontal by more than 3 mm.

Dry mix consumption

Plaster is consumed (the price for it varies within 200-900 rubles per package), depending on the thickness of the layer: about 10-15 kilograms are consumed per square meter of the base.

If the work is carried out by specialists, then you will have to pay about $ 15 for their services, not counting the cost of the materials and tools themselves.

Plaster layer thickness

Depending on the thickness of the walls, the material from which they are made, and the climatic zone in which the building is located, the size of the layer of the finishing composition also varies. According to standard calculations, 51 cm can be insulated by applying a layer of plaster of 8-10 cm to it. Of course, such a consumption of the mixture is simply enormous and irrational, so it is best to use it as an additional material. Unlike classic bricks, aerated concrete or ceramic blocks require a much smaller layer of plaster.

The standard thickness of the material recommended by manufacturers is from 2 to 5 cm. It is quite easy to calculate the required amount of the mixture, in addition, it is supplied in separate packages weighing 7-10 kilograms. The standard amount of plaster is usually enough to apply a layer of 2-2.5 cm per square meter of surface.

Knauf plaster

Dry mix "Knauf" is a very expensive finishing material with good heat-insulating and water-repellent properties. Safe insulation, easily applied to the prepared base. Its advantages include vapor permeability, resistance to weathering, absolute environmental friendliness and additional surface insulation.

Knauf plaster is the best option for interior finishing works.