Building a warm and comfortable country house requires solving often very complex and contradictory problems. 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 this problem.
The 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 – polystyrene foam granules, perlite sand, foam glass (expanded glass), etc.;
- a binder mixture, which is usually cement, lime, gypsum and their mixtures;
- polymer additives - plasticizers, water-repellents, air-releasing agents, 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 it is known to be a good heat insulator. So it turns out that after applying warm plaster to the wall, it appears to be protected by an additional layer of heat insulator.
Properties of thermal insulation plaster
The advantages of warm plaster are not limited to thermal insulation. The composition of the mixture itself suggests what possibilities this material contains.
- Fire safety. Warm plaster with a 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 flammable and belongs to group G1.
- Ecological cleanliness. Traditional insulation materials (mineral wool, polystyrene foam) emit harmful substances, which does not happen with warm plaster.
- Multifunctionality. In addition to a thermal insulation coating, warm plaster can serve as a material for decorative finishing and be used as a finishing coating. At the same time, it can be used to level surfaces.
- 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 polystyrene foam.
- Physical characteristics. Thermal insulating plaster is much lighter than traditional plaster and during installation has virtually no additional impact on the foundation and walls. In addition, it has high adhesion to all wall materials.
- Practical use of warm plaster– it is easy to work with and does not require special qualifications.
About fillers
The properties of heat-insulating plaster are largely determined by the type of filler. The filler can be:
- Sawdust. When using them, the result is the cheapest, but least efficient look warm plaster.
- Expanded polystyrene. Foamed polystyrene has good sound and thermal insulation characteristics , has good adhesion. But this flammable material
- and at the same time it releases toxic substances. Perlite is a material obtained from volcanic glass (obsidian) heated to 1100°C. At this temperature, obsidian begins to swell, becomes porous, and a large number of air bubbles, 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 use is called perlite plaster. The disadvantage of perlite is considered to be its high hygroscopicity, which requires the use additional materials - to protect it during finishing.
Vermiculite. A mineral belonging to the mica group (the so-called intumescent mica). Materials based on it can withstand temperatures from minus 260 to plus 1200 degrees Celsius. When fired, it increases significantly in volume (up to 50 times), resulting in scaly particles. In 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 those of perlite plaster - it is highly hygroscopic, which requires - additional costs
for guard.
Warm plaster is used to interior work and external. 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 time and air conditioning in the summer.
This means that insulating plaster will be applied in addition to the protection included in 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 heat-insulating material there should be even more.
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 brick, themselves have good heat-shielding characteristics. However, in this case, warm plaster will be useful precisely as additional protection, increasing the overall thermal resistance of the building.
Options for obtaining thermal insulating plaster
For interior decoration, such material is convenient to use in places with complex configurations, 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 parts of paper pulp;
- add water;
- the resulting mixture must be mixed until it becomes a regular 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. The brick or concrete base must first be moistened before applying plaster to it.
The warm plaster obtained in this way, the reviews of which are very positive from those who used the described production method, resembles cardboard in appearance. Its heat resistance is four times higher than that of conventional plaster.
Another method of making warm plaster with your own hands differs from the one described above, and produces a universal material suitable for indoor and outdoor use. For this we use:
- 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 you need to mix dry cement with filler and add water with a plasticizer, achieving a thick but plastic mass.
After the mixture is ready, you need to let it stand for 15 minutes, stir again and you can start working. A similar heat-insulating plaster, the reviews of which are commendable from those who have used it, is successfully used in various options for interior and exterior decoration.
Industrial materials
However, in addition to the possibilities self-made, you can use the finished product. The industry successfully produces various varieties similar material, for example Knauf Grünband heat-insulating plaster. It is a plaster mixture (dry), intended for any type of work, based on sand, cement, filler in the form of expanded polystyrene (pellets) and hydrophobic additives and has water-repellent and heat-insulating properties.
Another option would be Houncliffe insulating plaster. It consists of a composite filler (produced by the manufacturer), basalt fiberglass, sand, cement, and polymer binders.
Applying warm plaster
A mixture, such as Knauf warm 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. It is ready to work within 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 plus 5°C. Apply the finished mixture with a spatula and level (rub in) using a grater or rule.
It is not recommended to make the layer thickness more than 2.5 centimeters; if you want to obtain a greater thickness, then you need to make several layers in succession. The surface can be painted after two to three days. After 28 days, the layer acquires maximum strength, and the thermal insulation capacity reaches maximum value 60 days after drying.
Warm plaster is a group of finishing coatings for external and internal use, combining leveling, hydro- and thermal insulation properties.
Composition, brands and GOSTs
The composition of warm plasters may vary due to the heat-insulating filler and binder base. Bulk materials act as fillers materials with low thermal conductivity: expanded perlite, vermiculite, polystyrene foam granules, foam glass. Some sources recommend sawdust, but they provide worst quality coatings are susceptible to rotting and fire, and are therefore excluded from the review.
Also distinguished special type warm plaster used for radiation insulation of medical premises. Baryte plaster contains crystalline barium sulfate, a compound that absorbs x-rays.
Warm plaster for exterior use It is made on the basis of cement grades M-500 or M-300. With a hydrophobic filler (foam glass, EPS, etc.), such a coating is not afraid of precipitation, temperature changes and ultraviolet radiation. Plaster on insulation protects the main layer of thermal insulation from negative weather conditions.
For interior decoration indoors use mixtures based on lime and gypsum, which are not resistant to moisture.
Perlite is presented on the domestic market thermal insulation plaster following trading stamps:
All of them comply with GOST 31251 as materials with the highest degree fire safety.
Release form
Ready-made mixtures are produced in dry form in bags weighing 7-30 kg. Depending on the formulation, they may contain superplasticizers that improve the solubility of cement and increase the plasticity of the solution. At home, such an additive is PVA glue or liquid soap dissolved in water. The plasticizer consumption is no more than 1% of the mass of cement in the mixture.
The shelf life of the mixed mixture is 30-90 minutes, so it is important to balance the volume of the prepared solution and the speed of work.
Characteristics
Specifications warm plasters may vary depending on the filler.
| Name | Meaning | A comment |
|---|---|---|
| Strength kg/cm2 | An excellent indicator that allows you to use the mixture to seal cracks between bricks. |
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| Volumetric weight kg/m3 | For a mixture based on PPS granules. |
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| Shrinkage mm/m | Absent | After drying, it does not shrink. |
| Thermal conductivity W/mOK | Inferior to synthetic and mineral insulation 1.5-2 times, exceeds the usual cement-sand mixture by 4-5 times. |
|
| Frost resistance, cycles | The average indicator is compensated by the ease of repair. |
|
| Water absorption% | Required additional protection from moisture. |
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| Vapor permeability | Maintains an even microclimate in the room, there is no “dew point”. |
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| Fire resistance | Based on mineral granules - non-flammable coating, based on EPS - low-flammable. |
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| Cost RUR/m2 | Material consumption is 2-4 kg/m2 |
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| Soundproofing | Partial | A high soundproofing effect is achieved by mixtures with a fibrous filler such as the Houncliffe basalt mixture. |
| Toxicity | Absent | Completely environmentally friendly material. |
| Life time | Depends on the application. The outer coating lasts less, the inner one is as durable as possible. |
Unique qualities
The main advantage warm plaster serves its high plasticity and adhesion (adhesion to the surface). It does not require perfectly smooth walls and performs an additional cosmetic function when decorating a room.
Allows you to isolate slopes, cracks and internal corners, where installation of sheet and roll thermal insulation is difficult. There is no need for fasteners that act as “cold bridges” for other materials. The application speed of professional workers reaches 100 m2 in 1 day.
Warm plaster combines environmental friendliness and durability, does not emit volatile compounds and dust.
Minuses
The main disadvantage warm plaster its raw weight is used. The plastering process takes place in several stages; it is impossible to immediately apply a thick layer. The work is carried out in 3-4 passes, maintaining the previous layers until they “set” firmly.
The thermal insulation qualities of the mixtures are average, and the price is higher than the more energy-efficient PPS. It is not used as the main insulation material in Russia; its thermal efficiency in our conditions is too low.
Application area
Insulation interior spaces, soil finishing of walls. The use of such thermal insulation can reduce heat loss by up to 40%. This one is recommended material for additional thermal and sound insulation of walls and ceilings, window slopes, pipelines, sealing cracks.
Warm plaster for facade used as a protective and decorative coating for basic thermal insulation: mineral wool, glass wool, polystyrene foam, PPS or basalt slabs. It protects the insulation from moisture, weathering, ultraviolet radiation and has a beautiful rough texture.
Installation methods
Instructions for preparing the finished mixture are usually indicated on the packaging. To prepare the solution at home, the binder component (cement, lime or gypsum), water and bulk filler are mixed in a ratio of 1:1:4. The mixture is thoroughly kneaded to the consistency of thick sour cream, after which it can be applied to the cleaned surface.
Plastering interior walls carried out along the beacons, the thickness of the applied layer warm plaster should not exceed 1 cm in one pass. If it is necessary to increase the thickness of the coating, then the first layer must dry, otherwise the plaster will fall off under its own weight. It is not advisable to make a layer thicker than 3 cm; the thermal insulation properties decrease as a result, and the load on the base becomes critical.
Plaster on facade insulation applied in a thin layer: 3-4 mm in the first pass, no more than 1.5 cm in total after preliminary application and drying of the reinforcing layer.
Warm plaster for interior work is a relatively new building material that simultaneously performs three functions: levels and decorates walls, and also ensures a comfortable temperature inside the room. Some types of this material have soundproofing properties.
Most often, heat-insulating plaster for interior work consists of the following substances:
- Fillers.
- They can be very diverse: from sawdust to foamed polystyrene. Binding component.
- The most commonly used cement is grade 400 or 500. Gypsum and slaked lime are also used, but extremely rarely. Additional components.
Used to increase viscosity, plasticity and water-repellent properties. The composition of warm plaster most often includes cement, additional components and filler, on which the level of thermal insulation depends
Types of material Basic performance characteristics
- plasters depend on the type of filler: Expanded polystyrene.
- It has the same level of thermal insulation as polystyrene foam. In addition, its cost is relatively low.
- But the material is flammable and releases harmful substances when burned. Sawdust. This is the cheapest material that is considered environmentally friendly. The level of thermal insulation is low, but you can use it to make warm plasters yourself. Perlite.
- This material is obtained from a natural substance – volcanic glass. The substance is treated at high temperatures, as a result of which it acquires a porous structure. Perlite is resistant to temperature changes and pathogens, it is easy to process and lay, but at the same time it absorbs moisture well.
- Vermiculite. It is made from mica. The main advantages are fire safety,. Compared to the above materials, foam glass loses in terms of thermal insulation. But it can be used for finishing wet rooms.
Types of fillers for heat-insulating plaster Advantages and disadvantages
Insulating plaster has the following positive aspects:
- High level of thermal insulation. A 5 cm layer of plaster has the same thermal insulation value as two rows of bricks.
- Good level of sound insulation.
- Fire safety. Most materials used for insulation are non-flammable. The exception is foamed polystyrene, but it is not very popular.
- Relatively light weight. This type The finishing material is lighter than most conventional plasters, so there will be no unnecessary impact on the walls and base of the house.
- Adhesion. Warm plaster mixtures have good adhesion to most building materials.
- Environmental friendliness. In most cases, substances of natural origin are used to produce this material.
- Ease of installation. This plaster is applied in a thin layer, so installation of a reinforcing mesh is not required.
The main disadvantage is the fact that warm plaster is slightly inferior to standard insulation in terms of thermal conductivity. In addition, the mixtures are quite expensive.
Brief overview of factory-produced plasters
Knauf Grűnband. The plasters of this brand are considered the highest quality and most popular in the world. modern market . This material is produced on the basis of cement, and the filler is polystyrene foam with a fraction of about 1.5 mm. In addition, the composition contains additional components that increase the performance characteristics of the finished coatings. After drying, the plaster is not afraid of water and is different structural coating . The thermal conductivity of the mixture is 0.55 W/m°C. Minimum thickness
layer – 10 mm, maximum – 30 mm. The material can be applied manually or using a machine. Supplied in 25 kg bags, the average consumption is 12 kg per square meter with a layer of 10 mm. Knauf Grűnband - warm plaster with expanded polystyrene filler AuBenputzPerlit FS-402. based on Portland cement, to which perlite is added. The mixture was developed specifically for finishing cellular concrete surfaces, but it can be used to treat any surfaces, including old plaster. Insulated surfaces do not have the highest thermal conductivity coefficient - 0.16 W/m°C. The filler fraction does not exceed 0.6 mm, resulting in the formation textured coating, requiring further decoration. The maximum layer is 50 mm, and the consumption is 10 kg per square meter with a layer of 10 mm.
AuBenputzPerlit FS-402 – thermal insulation composition with perlite filler
Unis Teplon.
Quite a popular material that is intended exclusively for internal surfaces. It is made from gypsum and perlite. The maximum layer without the use of reinforcing mesh is 50 mm, with mesh – 70 mm. After drying, a coating is obtained that does not need to be subjected to further finishing. The mixture comes in two versions: gray and white. It can be used to prepare the base for wallpaper or paint. Thermal conductivity of plaster is 0.23 W/m°C. The material is packaged in bags of 5, 15 and 25 kg, consumption is 8 kg per square meter. Unis Teplon – plaster with gypsum base and perlite filler
De Luxe Teplolux. Warm plaster based on cement with the addition of foam glass with a fraction of 3 mm. After drying, the surface requires further finishing. The recommended layer is 40 mm, it will dry in 28 days. The mixtures are packaged in 12 kg bags, consumption is approximately 5 kg per square meter. De Luxe Teplolux - warm plaster with foam glass filler Paladium Palaplaster-207.
The main advantage of this material is Umka UB-21 TM.
This material was specially designed for cold winter conditions - it can withstand 35 freeze/thaw cycles. It is produced on the basis of cement and lime, to which foam glass granules are added. After drying, the plaster requires further finishing. The uniqueness of the material lies in the fact that if a reinforcing mesh is used, the layer of material can reach up to 100 mm. The plaster is supplied in 7 kg bags, and the consumption is 3.5 kg per square meter.
Umka UB-21 TM – plaster with foam glass filler
ThermoUm. Can be used for interior and exterior work. The material dries for at least 28 days, after which you can begin finishing it. After drying, the coating gains the ability to absorb moisture accumulated near the wall itself and release it into the air, which ensures a long service life of the surfaces. The mixtures are supplied in 7 kg bags, and the consumption is only 3 kg per square meter.
ThermoUm is a warm plaster that has a long service life
On a note! You should not make a conclusion about purchasing a certain type of plaster based only on consumption or cost indicators. The lower the consumption, the more expensive each kilogram of dry mixture will be, so it is better to make a full calculation in advance and decide on the budget.
How to prepare plaster with your own hands
The prices for ready-made mixtures are quite high, and if you look at the cost of individual components, the idea arises of making the mixture yourself. It is only important to remember that inaccuracies in the production process can significantly affect the quality of the finished coating.
The second option involves the presence of plasticizers. Internal surfaces of any type can be insulated with such compounds. To make this plaster, first of all, prepare a special solution. Carboxymethylcellulose, as well as plasticizers, the total amount of which should not exceed 1%, are dissolved in a small amount of water. All this must be thoroughly mixed and the solution allowed to brew. Then 1 part of the solution is mixed with 1 part of cement, 2 parts of perlite and 2 parts of sand are added. Mix thoroughly until a homogeneous material with the consistency of thick sour cream is obtained, after which it should be immediately used for its intended purpose.
You should know! The above recipes are approximate. The exact proportions depend on the quality of the materials used to make the plaster, the accuracy of the measurements, the composition of the water, and so on. All this can be controlled in a factory environment, but not at home. Therefore, you need to be prepared for the fact that the ideal formula will have to be derived by trial and error.
Warm plasters are a good option for those who want to stop using standard insulation and at the same time decorate their home. Such compositions are not cheap, but you can save a lot if you prepare everything yourself.
Internal wall insulation with warm plaster, its features, advantages and disadvantages, preparatory stage of work, material application technology and surface finishing.
Features of internal wall insulation with warm plaster
A distinctive feature of this plaster is its low thermal conductivity. This property is due to the presence of special fillers in the material instead of ordinary sand. They can be sawdust, polystyrene foam granules, expanded clay or pumice chips, perlite or expanded vermiculite. Any of these fillers gives the plaster insulating qualities and an affordable price.
Plaster with a base of foam granules has universal properties. It can be used both inside and outside the building. In addition to the filler, its composition includes lime, cement, plasticizers and other additives that give construction mixture special properties. Specific gravity such plaster is 200-300 kg/m3, thermal conductivity is 0.065 W/m*C and hydrophobicity is 70% by weight of the material.
Warm plaster containing sawdust as a filler is used exclusively for interior work. This is due to its sensitivity to moisture. The plaster layer takes a long time to dry, and the room during this procedure requires good ventilation to avoid the appearance of fungus on damp walls. But in terms of environmental safety this material flawless.
Warm plasters that include rock particles - perlite, vermiculite, pumice, as well as expanded clay chips - are considered universal. They can also be used to insulate walls from the inside and outside.
If we compare the thermal insulation parameters of polystyrene foam and warm plaster, it turns out that the first material is 2 times warmer than the second. And for complete insulation of cold walls in our climatic zone You will need a layer of polystyrene foam about 10 cm thick.
The following becomes clear: in order to achieve such a thermal insulation threshold, it will be necessary to apply a layer of warm plaster coating to the walls, the thickness of which should be more than 20 cm. However, it is not recommended to make such a coating more than 5 cm thick, since it may collapse under its own weight. Therefore, insulation of walls with warm plaster from the inside is most often carried out in combination with external thermal insulation building.
Advantages and disadvantages of insulating with plaster from the inside
Warm plaster has unique properties. Using only it, you can solve the issue of waterproofing, insulation and final finishing of walls with one technological procedure. The advantages of plasters containing rock particles as fillers - perlite, expanded vermiculite, that is, mixtures of the most “advanced” type, are especially pronounced.
Thanks to polymer additives included in the mixture, this plaster has excellent adhesion to any wall materials: aerated concrete, metal, ceramics and others.
Warm plaster easily allows air to pass through, while retaining water without getting wet. Therefore, walls covered with this material are protected from mold. In addition, warm plaster is biologically resistant, so the formation of microflora in it is excluded. By treating the walls of a room from the inside with this material, you can not only insulate it, but also make it cleaner environmentally.
The effectiveness of insulation using such plaster is high not only due to the low thermal conductivity of the material, but also due to its close contact with the surface of the walls over their entire area without the formation of any cold bridges.
Another remarkable property of warm plaster is its fire resistance. Unlike expanded polystyrene and other similar insulation materials, insulating plaster coatings excellently protect walls without collapsing from extreme heat and open fire. Moreover, the layer of plaster does not have to be thick.
According to manufacturers promoting warm plaster mixtures to the market, this material, applied to the walls with a layer of 2 cm, is equivalent in its thermal insulation qualities to a masonry of 2 bricks or a concrete wall about 1 m thick. Taking this fact into account, it is easy to calculate how much it will decrease the weight of the structure and how much materials can be saved thanks to warm plaster. However, other experts consider this opinion to be quite controversial in terms of the asserted relationships. It’s just that applying this material is much easier than traditional insulation with its fastening, primer and finishing layer. By the way, during a work shift a team of three people can process warm mixture more than 80 m 2 walls.
In addition to the above advantages, warm plaster has other unique properties: the complete absence of toxic inclusions, the material is made from natural ingredients, past heat treatment; at any temperature, the plaster is environmentally friendly; it does not decompose, does not burn or freeze.
The disadvantages of the material include the following:
- Warm plaster made from polystyrene foam granules requires finishing coating. This does not apply to mixtures containing rock fillers.
- The high price of plasters based on perlite, pumice and vermiculite.
- The need for layer-by-layer application of material to the walls. A thick coating applied in one layer has a high probability of sliding off the wall under the influence of its own weight.
Preparatory work
Preparing walls for insulation with plaster to insulate the walls from the inside is carried out in the same way as before applying a conventional cement-sand mixture to their surfaces. If the old plaster is peeling, it should be removed. If not, then warm plaster can be applied over the existing layer.
Purpose preparatory work is to improve the adhesion of the insulating coating to the base surface of the walls. To do this, each of them needs to be filled with shingles or narrow slats of 5 mm, thus obtaining a space on which the plaster mixture will be well held. After this, it is necessary to stretch the mesh on the manufactured frame and fix it with nails, driving them into the slats.
The fastening step is assumed to be 10 cm, it must be done in a checkerboard pattern. The mesh can be woven or metal with cells of 50x50 mm. Recommended to use metal mesh, since the woven mesh has less strength and fits too tightly to the wall surface.
To make it possible to level the plaster layer on the walls, it is necessary to install beacon profiles. They need to be pressed into a mortar mixture such as Ceresit or Rotband, applied in molds to the base every 0.3 m, and then leveled in a plane. Beacons should be installed vertically in increments of 0.2 m less than the length of the plaster rule.
Before plastering, the walls must be moistened generously with water. This is additional measure to ensure high-quality adhesion of materials.
Technology of insulating walls from the inside with warm plaster
Warm plaster is applied to walls manually and by machine. In the first case, a spatula, trowel, trowel and other painting tools are used for work; in the second, a special mixing pump and a mortar gun are used.
Manual method of plastering walls
Before starting work, the contents of the entire package of warm plaster should be poured into a suitable container with a volume of 50-100 liters, water should be added in the amount specified by the manufacturer of the material, and then everything should be mixed using a construction mixer. It is necessary to know that the working capacity of the finished mixture is 2 hours.
It is easy to check the required consistency of the mixture. To do this, you need to scoop up a little solution with a trowel and tilt the tool strongly. If the plaster does not fall off its surface, it means that it has acquired plasticity and is ready for use. Its consumption with a layer of 25 mm will be 10-14 kg/m2 of dry mixture, with a thickness of 50 mm - 18-25 kg/m2, respectively.
Insulating mixture manual method should be applied to the walls in layers, the thickness of each layer should not exceed 20 mm to avoid the mortar sliding off the surface under the influence of its own weight.
Each subsequent layer of plaster should be applied no earlier than 4 hours after laying the previous one. The drying time of the coating may increase at high humidity and low air temperatures, for example, in autumn.
The working mixture must be applied to the primed wall surface from bottom to top, using a wide spatula, beacon profiles and a rule. The process of applying warm plaster without beacons and the quality of the resulting coating must be controlled using a 2 m long lath, a plumb line and a hydraulic level. The even plane of the plaster coating can be checked by applying a two-meter strip to it with its edge; as a rule, there should be no gaps between the tool and the wall. Small deviations of the finished coating from the horizontal or vertical are allowed, no more than 3 mm per 1 linear meter.
Removal of lighthouse profiles from the coating should be done 4-6 hours after completion of the main work. The vacated cavities must be sealed with a plaster mixture and leveled using a trowel.
It is recommended to check and accept the work for peeling, curvature and cracking of the coating no earlier than 3-4 weeks after the completion of plastering of the walls.
Mechanized method of plastering walls
For applying warm plaster coating mechanized way It is necessary to first prepare the mixing pump for operation, and then pour the dry mixture into the machine’s hopper. After this, in accordance with the desired consistency of the mixture, the dosage of water with the pump should be adjusted. It should be about 500 l/hour. Her exact value depends on the temperature in the house and the material of its walls.
After preparing and turning on the pump, the mortar gun must be held at a distance of 30 cm and perpendicular to it when distributing the mixture over the surface of the wall. The thickness of the plaster layer during application can be easily adjusted by the speed of movement of the mortar gun. The smaller it is, the more powerful the layer and vice versa.
The surface treatment must be carried out from the top corner downwards and then from left to right, while forming grips 0.7 m wide. The reciprocating movement of the gun should be such that the center of the spray of the mixture is located on the lower edge of the already applied plaster. Previous and subsequent grips should be overlapped on the left side by 10 cm.
As in the previous case, the plastered surface must be leveled using the rule, and after the mixture has dried, remove the beacon profiles and fill the empty channels with the solution.
After finishing spraying the plaster, the supply of the solution should be stopped by closing the air valve on the gun. The pump, hoses, gun and tools should be washed immediately with water.
Important! Plaster mixture should not remain in a static state for more than 15 minutes while in the pump or hose.
Finishing layer device
As was already said above, in finishing The walls need to be insulated with warm plaster made from polystyrene foam granules. Before applying the final coating, the trowels and the container intended for preparing the working mixture in it must be cleaned of all foreign particles that could disturb appearance coating during processing.
The finishing coat should be applied to obtain a uniform and presentable wall surface. Its thickness usually does not exceed 5 mm. After applying the final coating, it should be grouted using a trowel 300 mm long, made of metal or plastic.
How to insulate walls with warm plaster - watch the video:
To summarize, we can conclude: warm plaster is a good alternative to others thermal insulation materials. It is especially effective for double-sided wall insulation. At the same time, from the outside the building additionally receives beautiful finish, and from the inside environmentally friendly and reliable insulation.
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