Plaster with heat-insulating properties for interior work. Do-it-yourself work with warm plaster

The construction of a warm and comfortable country house requires the solution of often very complex and contradictory tasks. For example, to get savings 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. Help in solving such a problem can provide warm plaster.

A somewhat unusual name accurately reflects the purpose of the material. At its core, it is a building mixture with thermal insulation properties. It 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 mixtures thereof;
• polymer additives - plasticizers, water-repellent, 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 stuffed 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 protected by an additional layer of heat insulator.

Properties of thermal insulation plaster

The advantages that warm plaster has are not limited to thermal insulation. The very composition of the mixture suggests what possibilities this material holds.

1. Fire safety. Warm plaster with mineral filler (perlite, vermiculite, foam glass) is not combustible at all 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 group G1.
2. Ecological purity. Traditional heaters (mineral wool, polystyrene) emit harmful substances, which does not happen with warm plaster.
3. Multifunctionality. In addition to the heat-insulating coating, warm plaster can serve as a material for decorative finishing and be 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 to traditional materials in its properties. A layer of such plaster 5 cm thick is equivalent to laying two bricks or two to four centimeters of polystyrene foam.
5. Physical characteristics. Heat-insulating plaster is much lighter than traditional plaster and during installation it practically does not have an additional effect on the foundation and walls. In addition, it has high adhesion to all wall materials.
6. Practical application of warm plaster- it is easy to work with it and it does not require special qualifications.

About fillers

In many ways, the properties of heat-insulating plaster are determined by the type of filler. As a filler can be:

1. Sawdust. When using them, the cheapest, but least effective type of warm plaster is obtained.
2. Styrofoam. Expanded polystyrene has good sound and heat insulation characteristics, has good adhesion. But it 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 options for using it is called - perlite plaster.
   The disadvantage of perlite is its high hygroscopicity, which requires the use of additional materials to protect it during finishing.
4. Vermiculite. A 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. When fired, it significantly increases in volume (up to 50 times), resulting in scaly particles. By its properties, vermiculite is similar to perlite, absolutely non-flammable and non-toxic.
   The disadvantages of the 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 quartz sand, the structure of which includes closed glass cells. Foam glass is a waterproof and refractory material, very durable and does not shrink, does not need additional protection. However, heat-insulating plaster based on it is inferior in its characteristics to materials using perlite and vermiculite.

About application and protection

Warm plaster is used for interior and exterior. 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 winter and air conditioning in summer.

We are talking about the fact that insulating plaster will be applied in addition to the protection laid down during the design of the building. It is irrational to use it as the main defense. 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 heat-insulating material should be even greater.

However, when using modern building materials (porcelain 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 heat-insulating 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, a mixture for additional thermal protection can be made independently. Warm plaster with your own hands can be obtained in the following way:

• it is necessary to mix three parts of sawdust and one part of cement;
• then add paper pulp two parts;
• 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 are very positive for those who have used the described method of obtaining, resembles cardboard in appearance. Its heat resistance is four times higher than conventional plaster

Another way to make warm plaster with your own hands is different from the one outlined, and gives a versatile material suitable for indoor and outdoor use. For this are used:

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

All components are commercially available, 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 filler and add water with a plasticizer, achieving a thick but plastic mass.

After the mixture is ready, let it stand for 15 minutes, mix again and you can start working. Such heat-insulating plaster, the reviews of which those who used it are commendable, is successfully used in various versions 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 grades of such material, for example, Knauf Grunband heat-insulating 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 heat-insulating properties.

Another option would be Houncliff Insulating Plaster. It consists of a composite filler (produced by the manufacturer), basalt fiberglass, sand, cement, polymer binders.

Applying hot plaster

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

The surface must be cleaned of dirt and dust before applying the material on it, it is possible to plaster at a temperature not lower than plus 5°C. Apply the finished mixture with a spatula and level (rub) with a grater or rule.

The layer thickness is not recommended to be more than 2.5 centimeters, if you want to get a greater thickness, then you need to sequentially make several layers. The surface can be painted after two or three days. After 28 days, the layer acquires maximum strength, and the heat-insulating ability reaches its maximum value after 60 days after drying.

It was worth changing the composition of the usual one a little, as a completely new material appeared - warm plaster. Manufacturers attribute unique qualities to it and declare that the material can be used as an independent one. So what is it Is it true or just another gimmicky 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?

No. 1. Composition of warm plaster

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

The composition of warm plaster includes such components:

Material is usually supplied as a dry mix and must be diluted 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 terms of thermal insulation to a wall of two.

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

No. 2. Advantages and disadvantages of warm plaster

Warm plaster has become widespread due to its significant benefits:

Now oh shortcomings:

No. 3. Types of warm plaster fillers

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

• sawdust. The composition of sawdust warm plaster, in addition to sawdust itself, also includes clay, paper and cement. The use of components so “gentle” and sensitive to negative environmental factors does not allow the composition to be used for facade insulation, but such warm plaster is excellent for interior work, especially since it can even be applied to a wooden base. Internal thermal insulation will improve efficiency;
• crushed perlite obtained from obsidian, which swells during high-temperature processing with the formation of a mass of air bubbles inside, which increases the thermal insulation properties of the material. The only negative is the increased hygroscopicity, so such plaster needs reliable waterproofing;
• expanded vermiculite obtained from mica, the material withstands a wide range of temperatures, has antiseptic properties, is light in weight, absolutely resistant to fire, can be used for exterior and interior decoration, but, like perlite, it is afraid of moisture, therefore it requires enhanced protection;
  
• balls from foam glass obtained from foamed quartz sand. This 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 aggregates, in addition to vermiculite, perlite and foam glass, they are also used expanded clay chips and pumice powder. These materials cannot boast of high moisture resistance and are inferior to analogues in many other qualities, therefore they are used infrequently;
• polystyrene foam 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 polystyrene foam, they are not used so often. In addition, the surface of the plaster comes out too soft, so it requires mandatory finishing.
  

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

To determine whether warm plaster can be used 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 the determination of 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;
• determine resistance to heat transfer of the walls of the house, for which we need to divide the wall thickness by the thermal conductivity of the material. Let's do the calculation for two houses. One is located in Moscow and is built from, the wall thickness is 0.5 m, the thermal conductivity coefficient from the table is 0.58 W / m 0 C, therefore the heat transfer resistance is 0.86 m 2 * 0 C / 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) \u003d 2.42 W / m 0 C. For a house in Krasnodar (2.44-1.82) \u003d 0.62 W / m 0 C;
• payment layer of warm plaster, its thermal conductivity coefficient is 0.063 W / m * 0 С (maybe a little more - depends 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 house 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, as well as take into account the number and size of windows and a lot 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 heater 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. Usually, dachas are used with it to eliminate cold bridges, to process window and door openings. It is better to use insulation on the outside, but if this is not possible, it can be applied inside to complement the external thermal insulation.

No. 5. Warm plaster manufacturers

You can save and make warm plaster with your own hands. The most versatile and inexpensive mortar 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 you can replace it with PVA glue at the rate of 50-60 g of glue per 10 liters of plaster. The mixture is diluted with a water-adhesive composition and constantly stirred for uniformity. 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 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 plaster on beacons, although some neglect this rule. As lighthouses, an aluminum profile is used, which is fixed with putty, it is allowed to use prepared plaster. 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 reinforcement with a mesh, but when applying a thick layer of insulation and at corners, the use of a mesh is desirable;
• the process of applying warm plaster is not original and identical. The solution is placed with a spatula on a trowel, after which it is applied to the wall with rubbing movements from the bottom up between the beacons. The surface is leveled by the rule;
  
• within 2 hours after application, the solution remains plastic, so flaws are easy to fix. During this period, beacons are removed, the cracks are rubbed with the same solution. If desired, the surface can be treated with a decorative spatula or structural roller to achieve an interesting effect. If a flat surface is needed, 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 you need to process a large area of ​​\u200b\u200bthe wall, then it is better to use the machine method of applying plaster.

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

In construction, two main methods of insulating the outer walls of structures are used - the construction of false walls with the 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, it is applied warm plaster for outdoor work. In the construction market, such material appeared relatively recently, but due to the 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 filler, most often, foam granules, expanded clay chips, crushed pumice or perlite sand are used.
The most versatile type is plaster with filler and from 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 work, in addition, 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 exterior surfaces. If sawdust plaster is used for interior work and applied to concrete or wooden walls, then during the drying of the plastered surfaces it is necessary to carry out ventilation 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, the most suitable and reliable type of building material is plaster, which includes polystyrene foam, lime, cement and other components. This is the most common version of the finishing material, so it is worthwhile to dwell on the description of its characteristics. However, it is worth remembering that do-it-yourself warm plaster for outdoor work must be well versed in technology.

Use of warm plaster

Such material is used not only for exterior decoration, but also for thermal insulation:
floors and floors;
window and door slopes;
basement of the building;
cold and hot water supply risers;
for blocking the joints of ceilings and walls;
giving sound insulation to internal walls;
to increase the thermal insulation of walls erected using today's well-known well masonry technology.

Comparison of material with traditional insulation

First of all, you should pay attention to the efficiency 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 applying a layer of plaster on top of them. Comparison will be carried out in three directions: density, degree of moisture absorption and flammability.
During the analysis, it was found that warm plaster is 10 times heavier other thermal insulation materials, this means that due to the weighting of the walls, you will have to take care of laying a more reliable foundation.


To obtain heat saving indicators similar to those given by polystyrene foam or mineral heaters, a layer of warm plaster will have to be applied 1.5-2 times denser. Based on the calculations made, it was found 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 on the outer and inner surfaces of the walls. In the future, the walls will need to be processed primer and decorative putty. Such a warm plaster for outdoor work with your own hands has a number of distinctive properties.
Follow the main advantages of warm plaster can be noted:
application option on uneven surfaces;
high speed plastering walls;
the possibility of application without the use of reinforcing mesh;
good adhesion (compared to other finishing materials);
the absence of metal components that can become "cold bridges";
impossibility after finishing damage to the surface by rodents.

Material application technique

The technology for performing finishing work using warm plaster is not very different from the method of applying conventional plaster.
First of all, you need clean the surface walls from debris and dust, treat it with deeply penetrating impregnations. In addition, experts recommend using a special plaster grid. The surface of the wall before applying a layer of warm plaster should be well moistened.
Usually, the whole 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 turned over, the composition scooped up with a trowel holds well, then the warm plaster for outdoor use 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. 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 air humidity and ambient temperature, so it may take a little longer. The mixture is applied to the wall with a spatula, with smooth movements from the bottom up. If you apply too much plaster to the surface, it will begin to slide.


Time will help to make sure 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 blisters, cracks and geometry changes premises, which is checked using a building level or plumb line. At the same time, a horizontal and vertical deviation of no more than 3 mm is permissible on 1 running meter.
Due to the fact that the thickness of the layer of warm plaster does not exceed 50 mm, and the surface does not have fibrous, the statement about soundproofing properties material. Moreover, the finishing material does not have elasticity, which will be enough to dampen pops, sharp sounds and knocks.

Before applying warm plaster, the surfaces must be cleaned, weak layers of the previous finish removed, and 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 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 fabric, more - it is better to use a chain-link.

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

For porous materials, warm plaster for aerated concrete, brick, foam concrete is laid in 2 stages. The first layer of a more liquid solution is required - a spray (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 tiles is prepared in a special way. A polypropylene mesh is mounted on a quick-drying solution (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 has completely dried, you can tile the tiles.

Warm facade plaster is quite simply sanded, you can treat the surface with an abrasive, cover with primer and paint with exterior paint, based on silicone or silicate. Also with this type of finish, you can use all types of ventilated facade systems. But decorative plaster and tiles for outdoor work on warm plaster are not recommended.

Mortar grouting methods

Warm plaster for interior work is a very unusual and new building and finishing material for many, which has 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.

Composition of warm plaster

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 crumb.
• Powder derived from pumice.
• Styrofoam granules and other materials.

Varieties of warm plaster

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

The following three are among the most popular.

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 can also be used for interior decoration - it is a universal building material. Among the advantages of vermiculite warm plaster are 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 consists of 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 application to 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.

Styrofoam granules plaster

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

Styrofoam granular plaster is the most common, unlike the other two types.

Scope of warm plaster

To date, 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 sewer drains, risers of hot and cold water supply.
• Insulation of window blocks and slopes in places where they fit to the walls.
• As a heat-insulating and sound-proofing material for interior finishing work.
• Experts advise using warm plaster as a material for insulating floors and ceilings.

Benefits of warm plaster

• Quick application of plaster - in a day of work, you can cover a surface of 110-170 square meters. m.
• Does not require the use of reinforcing mesh.
• There is no need to level the walls if warm plaster is used for interior work.
• The mixture has excellent adhesion to all types of surfaces.
• There is no risk of occurrence because there are no metallic bonds.

Flaws

• The mixture does not belong to the category of finishing coatings and requires the application of not only a primer, but also a layer of decorative plaster.
• Unlike wool or polystyrene, the thickness of 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 mix, it is best to use it in the following works:

• Sealing of joints and cracks in ceilings and walls of buildings.
• For internal work in 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.
• Window trim.
• Basement insulation.

Technology for applying warm plaster

The base before applying this type of dry mix is ​​prepared 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 is that before starting work on applying 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. Clean water is added in the amount indicated on the plaster package.
3. With the help of a construction mixer, the mass is mixed.
4. The life of the finished mixture is 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 it. Finished plaster can be applied both manually and by machine.

• Warm plaster is applied to the base surface 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.
• The drying time of each layer may vary depending on the level of humidity in the air.
• Warm plaster is applied with movements from the bottom up.
• Checking the applied layer is carried out three to four weeks after all work has been completed.
• The full curing of the plaster occurs within one to two months.

Mistakes when applying warm plaster

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

The quality is checked quite simply: for this, a rule-rake is applied to the surface. In the presence of gaps between the tool and the wall, there are violations of the geometry.

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 between 200-900 rubles per pack), depending on the thickness of the layer: about 10-15 kilograms are spent per square meter of the base.

If the work is done by specialists, 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 on it. Of course, such a consumption of the mixture is simply huge 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 material thickness recommended by manufacturers is from 2 to 5 cm. Calculating the required amount of the mixture is quite simple, 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.

Plaster "Knauf"

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

Plaster "Knauf" - the best option for interior finishing work.