Facade plaster for exterior works: distinctive features of the material
After the completion of construction work, they begin to finish the exterior walls of the building. High-quality cladding creates not only a presentable appearance of the structure, but also protects the structure from the negative effects of precipitation, sunlight and mechanical damage. Facade plaster for exterior work is the most popular material, which can be found in detail in this article.
Surface preparation with facade putty for exterior work
Before proceeding to the finishing cladding of the exterior walls of the building, the foundation should be prepared using facade putty. It is designed for leveling surfaces made of concrete, stone, brick, foam blocks, gas blocks, gypsum boards and other materials. Facade putty for exterior work should have moisture resistance, frost resistance, parapenetrability and elasticity.
There are starting and finishing facade putty. The starting mixture is used for the lower finishing of the base. Thanks to the coarse-grained structure, it is able to smooth out irregularities, differences. It is used for sealing chips and cracks. The result is a solid foundation. The working solution should resemble the consistency of sour cream. Putty is applied with a layer of no more than 1.5 cm.
The finishing putty, which has a finely dispersed structure, is used for the final alignment of the base and provides a smooth, even surface for subsequent decorative cladding. The working solution is prepared more liquid than the starting mixture. The thickness of the layer should not be more than 4 mm.
Depending on the composition, the putty can be cement or polymer. Cement compositions have increased resistance to moisture and low temperatures. Quartz sand is present in the composition of the starting cement mixtures, and marble dust or quartz ground sand is added to the finishing putty. This is an unpretentious and inexpensive option, however, cracks may appear on the surface when the building shrinks. Popular brands of cement putties are Kreisel 662, SCANMIX TT, Knauf Multi-Finish, Plitonite and Facade.
Polymer putties, which include polymer binding components, can be acrylic or latex. Acrylic mixtures are moisture‒resistant, elastic and plastic due to the main component – acrylic. This plaster is applied to a pre-primed concrete or foam concrete surface, with a layer of 1-3 mm.
Latex putty, made on the basis of latex, is available in the form of a paste without odor and release of harmful substances. This mixture has high plasticity, which eliminates the formation of cracks after it dries. Despite the high cost, it creates a durable coating. The most popular brands of polymer putties are SCANMIX LH STANDART, Bolars, Parade Classic.
Now you can proceed directly to the decorative design of the walls of the building, using facade plaster for exterior work.
Facade plaster for exterior works: varieties and well-known brands
Decorative plaster for exterior works differs from facing materials that are intended for interior spaces. The composition of these mixtures contains additives that give the material plasticity, strength, moisture resistance and frost resistance.
Wondering how to choose facade plaster for exterior work, it is necessary to pay attention to the compliance of the material with such requirements:
- resistance to temperature changes;
- the presence of water-repellent properties;
- increased degree of vapor tightness;
- sufficient strength to protect the facade of the building from mechanical damage;
- the coating should create sound and thermal insulation;
- increased resistance to harmful radiation;
- the presence of decorative characteristics of the composition.
Any exterior decoration creates additional thermal insulation of the building. However, for thin walls, you should choose the so-called warm plaster for outdoor work, which will contain a special filler. It can be perlite, expanded polystyrene, vermiculite, sawdust or foam glass. They increase the thermal insulation properties of the finishing mixture. So, a layer of plaster in 3 cm is able to replace brickwork with a thickness of 15 cm according to its characteristics.
An additional sound insulation layer is provided by the exterior plaster of the house. To do this, it must contain pumice stone, magnesite or cement with slag or pumice. These porous components are able to partially absorb noise.
Useful advice! If the building is exposed to a high level of noise, the exterior plaster, as a reliable sound insulation, is ineffective. Additionally, mineral wool or foam boards should be used. Also, you can make warm plaster for the facade.
Among the proposed range of compositions for outdoor work, 4 main types of facade plasters can be distinguished, which differ in properties, composition and application technology. There is also a fifth type ‒ gypsum plaster for exterior work. However, it has a high degree of exposure to environmental influences, which makes it impractical for external cladding. It can be used to level the base or to prepare the surface for subsequent decorative cladding.
All facade plasters can form a smooth or relief surface such as “bark beetle”, “fur coat” or “mosaic”.
Features of mineral plaster for facades
The composition of mineral plaster includes slaked lime, Portland cement, stone chips, colored clay, additional elements that increase the performance characteristics of the finished surface and components responsible for the texture of the finished facade. To increase resistance to fungus and mold, additional fillers may be present in the mixture.
The mixture is produced in ready-made packages in the form of a powder, which must be diluted with a certain amount of water to obtain a ready-made solution. It is applied to any type of surface. Before facing the walls, it is necessary to mount a grid under the facade plaster, which will align the surface, create additional adhesion of the plaster with the base and reduce the risk of cracks.
Cement plaster for outdoor work creates a durable “breathable” decorative coating that does not smolder, does not burn and does not emit toxic substances when heated. The suitability of the composition for work is no more than 90 minutes. After complete drying, a durable non-flammable coating with sound and thermal insulation properties is formed on the wall surface. Decorative finishing material is provided by color additives and granules.
Useful advice! Due to its low vibration resistance, mineral plaster should not be used for buildings located near railways and in areas with increased seismic activity.
Mineral plaster is able to withstand temperature fluctuations from -30 to +45 ° C. without losing its operational properties. The service life of such a coating is at least 15 years.
The color scheme of cement plaster is very limited, which reduces the degree of its decorative effect. The finished surface of cement plaster can be painted in any color, thereby creating a more aesthetic appearance of the building.
Today, Knauf mineral facade plasters from the Diamond line are very popular, which have increased moisture-repellent properties and resistance to aggressive atmospheric influences. Using a mixture of Diamond-240, you can get a textured surface “bark beetle”, and Diamond-260 forms a rough lining, which is called a “fur coat”. The price of a package of 25 kg is about 900 rubles.
Another equally popular option is mineral facade plaster Bolars, which you can buy at a price of 700 rubles. Having a self-leveling structure, thanks to the modifying additives included in its composition, it creates a perfectly smooth and smooth surface.
Acrylic decorative plaster for the facade of the house
Acrylic resins are used in the composition of acrylic plaster instead of cement as a binder. In addition, modifiers are used here, which increase the plasticity and strength of the coating, dyes and one of the fillers, such as stone chips, sand or colored granules, creating the structure of the decorative surface.
Acrylic plaster is available in the form of a ready-made solution, which is immediately suitable for application. The layer sets in 20 minutes, and the surface dries completely after 48 hours. During this time, the coating should be protected from direct sunlight, which contribute to cracking of the lining layer.
Useful advice! Due to the rapid setting, the joints of the layers may be noticeable on the surface, so it is better to entrust the work to a professional.
The acrylic-based mixture has increased resistance to temperature changes. It creates a good moisture-resistant surface with additional protection from strong gusts of wind. Due to the high elasticity of the coating, the probability of cracking of the surface is reduced. The facade of the building, made of acrylic plaster, will have increased resistance to abrasion and impact, which increases the service life of the surface, which reaches 20-25 years.
However, it is able to quickly attract dirt to itself. To clean the surface, it is enough to pour the lining with water from a hose. Another disadvantage of the acrylic-based exterior composition is the instability of the pigment to UV radiation, which fades after a while. This plaster is not recommended to be applied to a base of mineral wool and walls of cellular concrete.
Decorative plaster with your own hands, video and description
Video of application technology and composition features. Several recipes for self-production of decorative plaster from improvised means.
The most popular manufacturer of acrylic plasters is the company Caparol. The price of the facade plaster “bark beetle” starts from 600 rubles. A mixture of granular structure of the “fur coat” type can be purchased at a price of 800 rubles.
No less popular manufacturer of acrylic mixtures is the company Baumit, which offers its products at a price of 1500 rubles.
Features of silicone plaster for the facade
This is one of the most expensive facade mixes. The composition of silicone plaster includes silicone resins, coloring pigments, fillers and additives that increase the durability of the material. The mixture is produced in the form of a ready-made solution suitable for application to a surface previously cleaned of dirt and dust. The technology of applying plaster and its drying conditions are the same as that of the acrylic mixture. Work on the facade of the building can be carried out in difficult weather conditions. However, the mixture cannot be applied to the insulation layer. It is necessary to create a reinforcing mesh on top of it.
Useful advice! After finishing the facade with silicone plaster, you should cover the surface with a silicone primer. This will create additional elasticity of the surface and leave it intact with possible shrinkage of the building.
Silicone coating has increased moisture resistance, elasticity, self-cleaning ability, increased vapor permeability. The material is suitable for facing not only walls, but also the base. It is necessary to choose silicone facade plaster for aerated concrete, concrete and brick walls. The plastered surface is resistant to salt, so it is an ideal option for coastal regions with high humidity. The silicone surface will not become a breeding ground for the fungus.
There are more than 200 variants of colors and shades. The pigment that is part of the mixture is resistant to UV radiation, does not fade over time. The service life of such a coating is 20-25 years. The only drawback is the high cost of the mixture.
The most popular silicone plasters for the facade, the price of which starts from 2,400 rubles., are decorative mixtures of Caparoles. The manufacturer produces two types of textures of this plaster: “bark beetle” (AmphiSilan Fassadenputz R 20, AmphiSilan Fassadenputz R 20) and “fur coat” (AmphiSilan-Fassadenputz K15, K 20, K30).
Another brand of silicone plasters is considered to be the company Baumit, which offers its products from 2,300 rubles.
Characteristics of silicate exterior decorative plaster
Another expensive, but high-quality facing material is silicate plaster. It is similar in composition to mineral plaster, but there is also liquid potassium glass, which improves the operational parameters of the surface.
This is the most elastic plaster for the facade. It has increased abrasion resistance, moisture resistance, antistatic properties. The facing surface provides a high level of external wind and moisture protection of the facade of the building. Preference should be given to silicate facade plaster for aerated concrete, concrete and wooden walls. Such a facing surface is ready to last for more than 25 years without losing its original decorative and operational properties.
The mixture is realized in the form of a ready-made solution, which is applied to a clean base. Manufacturers have taken care of a wide palette of colors and shades. However, after a while, you can change the color of the surface by painting it with silicate paint.
Important! Silicate plaster should not be applied to polymer insulation and surfaces painted with oil paint or varnish.
The main disadvantage of the silicate mixture is its rapid setting after application, which requires perfect execution of work from the first time without errors. To do this, you need to use the services of professionals. In addition, before applying silicate plaster, it is necessary to treat the base with a special primer that increases the adhesion of the mixture.
The most popular manufacturer of silicate decorative facade plaster, the price of which starts from 1800 rubles, is the company Baumit. It offers a wide range of high-quality and durable products. These mixtures have high viscosity, protect the walls from the effects of precipitation and burnout.
Characteristics and features of Ceresite facade plaster
Today, Ceresit facade plaster of German production is very popular due to the high quality of the material. Thanks to the special additives included in its composition, high strength characteristics of the material are ensured. It is characterized by increased moisture resistance, vapor permeability and elasticity. This coating has a long service life of about 20 years.
There are three types of textured facade plaster Ceresite:
- budget polymer-cement mixtures in which cement is used as a binding component;
- a mixture with polymer resins, which has high performance characteristics;
- expensive polymer-cement plasters, which include cement, sand, polymer synthetic additives, various plasticizers and fibers.
Ceresite plasters with a polymer composition can be acrylic, silicone and silicate. Acrylic mixtures are used in areas with high precipitation. Silicone plaster also resists moisture, steam, snow well. Such a facing coating is characterized by strength and durability. Silicate plaster for the facade adheres firmly to the base, and shows resistance to deformation. She tolerates the sun’s rays well. The cost of cement plaster is about 250 rubles. Decorative textured facade plasters “bark beetle” and “fur coat” can be purchased from 850 rubles.
Thanks to the wide range of colors of Ceresite facade plasters, you can choose the most suitable color that will create an attractive appearance of the building. It should be borne in mind that very light shades quickly fade and discolor, and too dark shades attract ultraviolet light most strongly, which contributes to rapid cracking.
The technology of wet plaster facade. Price per m2
The wet plaster of the facade is considered to be the technology of finishing the exterior walls of the building, in which the insulation, reinforced mesh and facing material are attached using semi-liquid or liquid compositions. Thanks to this finish, the dew point, which takes on the condensate, is carried outside the building, which affects the creation of a favorable microclimate in the house. For a wet facade, it is the use of adhesives, including plasters, that is characteristic.
The wet plaster facade consists of three main layers:
- thermal insulation;
The facade insulation under the plaster is fixed to the base with the help of an adhesive substance. For this, Portland cement compounds are often used, which provide excellent adhesion of the insulation and the bearing base.
It is very important to choose a good facade insulation for plaster. There are several varieties of this material. The best option in this case is the use of mineral wool, expanded polystyrene or OSB plates. They provide moisture resistance and reliable heat preservation. The average cost of installing a thermal insulation layer is 500 rubles/m2.
The base layer is a rigid interlayer that protects the insulation from negative influences. Polymer cement solutions or reinforced fiberglass mesh act as an interlayer. Installation of the base layer will cost 150 rubles / sq2.
The creation of a decorative layer is the application of facade plaster on the prepared surface. The cost of plastering the walls depends on the method of application (manual or machine) and texture, and on average is 400 rubles / sq2. Additional painting of the facing surface will cost from 170 rubles / sq2.
The main purpose of facade plaster is the final, finishing exterior decoration of the walls of the building. This decorative coating is affordable, durable and has a number of distinctive features that make it one of the most popular facing materials.