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After the end of construction jobs, start external finishing of walls of the building. High-quality facing creates not only presentable exterior of the building, but also protects design from negative impact of atmospheric precipitation, sunshine and mechanical damages. Front plaster for outside works is the most demanded material, in detail about which it is possible to learn in this article.
Surface preparation front putty for outside works
Before passing to finishing facing of external walls of the building it is necessary to prepare the basis, using front putty. It is intended for alignment of surfaces from concrete, stone, brick, foam concrete blocks, gas-blocks, plaster boards and other materials. Front putty for external works has to have moisture resistance, frost resistance, parapermeability and elasticity.
Distinguish starting and finishing front putty. Starting mix is applied to the lower finishing of the basis. Thanks to coarse-grained structure she is capable to smooth roughnesses, differences. It is used for closing up of chips and cracks. As a result the rigid base turns out. Working solution has to remind sour cream on consistence. The putty is put with layer no more than 1.5 cm.
The finishing putty having fine structure is used for final alignment of the basis and provides smooth, plain surface for the subsequent decorative facing. Working solution prepares more liquid, than starting mix. Thickness of layer should not be more than 4 mm.
Depending on structure, putty can be cement or polymeric. Cement structures have the increased moisture resistance and low temperatures. As a part of starting cement mixes there is quartz sand, and marble dust or quartz ground sand is added to finishing putty. It is unpretentious and inexpensive option, however, on surface cracks at shrinkage of the building can appear. Popular grades of cement hard putties are Kreisel 662, Scanmix tt, Knauf Multi-Finish.
Polymeric putties which part is polymeric binding components can be acrylic or latex. Acrylic mixes moisture-proof, elastic and flexible thanks to the main component ‒ to acrylic. This plaster is applied on previously grounded concrete or foam-concrete surface, layer of 1-3 mm.
The latex hard putty made on the basis of latex is produced in the form of odourless paste and allocation of hazardous substances. This mix has high plasticity that excludes clinking after its drying. Despite high cost, creates long-lasting covering. Scanmix lh standart, Bolars, Parade Classic are considered as the most popular grades of polymeric hard putties.
Now it is possible to start directly decorative decoration of the walls of the building, using front plaster for outside works.
Front plaster for outside works: versions and famous brands
Decorative plaster for outside works differs from facing materials which is intended for internal rooms. As a part of these mixes there are additives which give to material plasticity, durability, moisture resistance and frost resistance.
Asking question how to choose front plaster for outside works it is necessary to pay attention to compliance of material to such requirements:
- resistance to temperature drops;
- availability of water-repellent properties;
- the raised vapor impermeability degree;
- sufficient durability for ensuring protection of facade of the building against mechanical damages;
- the covering has to create sound insulation and heat insulation;
- the increased resistance to harmful radiations;
- availability of decorative characteristics of structure.
Any external finishing creates additional heat insulation of the building. However for thin walls it is necessary to choose so-called warm plaster for outside works as a part of which there will be special filler. It can be perlite, expanded polystyrene, vermiculite, sawdust or foamglass. They increase heat-insulating properties of finishing mix. So, the plaster coat in 3 cm is capable to replace brickwork 15 cm thick on the characteristics.
The additional sound-proof layer is provided by means of outside plaster of the house. For this purpose at its structure there have to be pumice, magnesite or cement with slag or pumice. These porous components are capable to absorb noise partially.
Helpful advice! If the building is exposed to high noise level, outside plaster as the reliable sound insulator, is ineffective. It is necessary to use in addition mineral wool or the foam plates. Also, it is possible to execute warm plaster for facade.
For outside works it is possible to distinguish 4 main types of front plasters which differ in properties, structure and technology of drawing from the offered range of structures. There is also the fifth type ‒ plaster plaster for outside works. However it has large-scale of exposure to influences of the environment that does it impractical for outer lining. It can be used for alignment of the basis or for surface preparation for the subsequent decorative facing.
All front plasters can form smooth or relief surface like “bark beetle”, “fur coat” or “mosaic”.
Features of mineral plaster for facades
Slaked lime, portland cement, pebble gravel, color clay, additional elements which increase the utilization properties of ready surface and components which are responsible for the invoice of ready facade are part of mineral plaster. For increase in resistance to fungus and mold at mixing ratio there can be additional fillers.
Mix is produced in ready packagings in the form of powder which needs to be dissolved with certain amount of water for receiving ready solution. It is applied on any type of surface. Before wall decoration, it is necessary to mount grid under front plaster which will allow to level surface, to create additional adhesion of plaster with the basis and to reduce risk of clinking.
The cement plaster for outside works creates the strong “breathing” decorative coat which does not smolder, does not burn and does not emit toxic substances when heating. Suitability of structure for work makes no more than 90 min. After full drying, on wall surface the strong nonflammable covering with sound-proof and heat-insulating properties is formed. The decorative effect to finishing material is provided by color additives and granules.
Helpful advice! Thanks to low resistance to vibrations, mineral plaster should not be used for the buildings which are near the railroads and in zones with the increased seismic activity.
Mineral plaster is capable to maintain temperature variation from-30 to +45ºС. without loss of the operating ability. Life cycle of such covering makes not less than 15 years.
The color gamma of cement plaster is very limited that reduces degree of its decorative effect. The ready surface from cement plaster can be painted in any color, to thereby create more esthetic building image.
Today, mineral front plasters of Knauf from the range Diamant which have the increased water-repellent properties and resistance to aggressive atmospheric actions enjoy wide popularity. Using the mix Diamant-240 it is possible to receive impressive surface of “bark beetle”, and Diamant-260 forms rough facing which is called by “fur coat”.
One more not less popular option is mineral front Bolars plaster. Having the self-leveling structure, thanks to the modifying additives being its part it creates ideally plain and smooth surface.
Acrylic decorative plaster for house facade
In composition of acrylic plaster instead of cement as binding substance, acrylic resins are applied. Besides, modifiers which increase plasticity and durability of covering, dyes and one of fillers, such as pebble gravel, sand or color granules creating structure of decorative surface are used here.
Acrylic plaster is produced in the form of ready solution which is suitable for drawing at once. The layer grabs in 20 minutes, and full drying of surface happens in 48 hours. Throughout this time it is necessary to save covering from influence of direct sunshine which promote cracking of facing layer.
Helpful advice! Because of fast grasp on surface joints of layers therefore it is better to entrust performance of work to the professional can be noticeable.
Mix on the basis of acrylic has the increased resistance to temperature drops. She creates good moisture resistant surface with additional protection against strong wind gusts. Thanks to high elasticity of covering, the probability of cracking of surface decreases. The building facade executed by acrylic plaster will have the increased resistance to abrasion and blows that increases the term of operation of surface which reaches 20-25 years.
However she is capable to attract quickly to herself dirt. For cleaning of surface it is enough to water facing from hose. One more lack of outside structure on the basis of acrylic is the instability of pigment to UV-radiations which grows dull after a while. This plaster is not recommended to be applied on the basis from mineral wool and wall from foam mortar.
The Caparol company is considered the most popular producer of acrylic plasters.
Not less popular producer of acrylic mixes is the Baumit company.
Features of silicone plaster for facade
It is one of the most expensive front mixes. Silicone pitches, coloring pigments, fillers and additives which increase firmness of material are part of silicone plaster. Mix is produced in the form of ready solution suitable for drawing on previously cleaned from dirt and raise dust surface. Technology of putting plaster and condition of its drying same, as well as at acrylic mix. Works on facing of facade of the building can be carried out in difficult weather patterns. However mix cannot be applied on heater layer. Over it it is necessary to create armoring lattice.
Helpful advice! After performance of facing of facade by silicone plaster, it is necessary to cover surface with silicone primer. It will create additional elasticity of surface and will leave it undamaged at possible shrinkage of the building.
The silicone covering has the increased moisture-proofness, elasticity, the ability to self-cleaning increased by vapor permeability. Material is suitable for facing not only walls, but also socle. It is necessary to choose silicone front plaster for gas concrete, concrete and brick walls. The plastered surface is steady against influence of salts therefore it is ideal option for seaside regions with the increased air humidity. The silicone surface will not become fungus breeding place.
There are more than 200 options of flowers and shades. The pigment which is mixing ratio is steady against ultra-violet radiation, over time does not burn out. Life cycle of such covering makes 20-25 years. The only shortcoming is the high cost of mix.
The most popular silicone plasters for facade, are the decorative mixes Caparol. The producer issues two kinds of invoices of this plaster: “bark beetle” (AmphiSilan Fassadenputz R 20, AmphiSilan Fassadenputz R 20) and “fur coat” (AmphiSilan-Fassadenputz K15, K 20, K30).
The Baumit company is considered one more brand of silicone plasters.
Characteristics of silicate outside decorative plaster
One more expensive, but quality facing material is silicate plaster. It is similar in structure to mineral plaster, but here in addition there is liquid potassium glass which improves operational parameters of surface.
It is the most elastic plaster for facade. It has the increased resistance to abrasion, moisture-proofness, antistatic properties. The facing surface provides the high level of outside windscreen and moisture protection of facade of the building. It is necessary to give preference of silicate front plaster for gas concrete, concrete and wooden walls. Such facing surface is ready to serve more than 25 years without loss of initial decorative and operating ability.
Mix is sold in the form of ready solution which is applied on the clean basis. Producers have taken care of wide color palette and shades. However after a while it is possible to change color of surface, having painted it silicate paint.
Important! Silicate plaster cannot be applied on the polymeric heaters and surfaces painted by oil paint or it is delicious.
The main lack of silicate mix is its fast grasp after drawing that demands ideal performance of work from the first without mistakes. For this purpose it is necessary to use services of professionals. Besides, before putting silicate plaster it is necessary to process the basis the special primer increasing adhesion of mix.
The most popular producer of silicate decorative front plaster, the Baumit company is considered. She offers the wide range of quality and long-lasting products. These mixes have the increased viscosity, protect walls from impact of atmospheric precipitation and burning out.
Characteristics and features of front Ceresit plaster
Today, thanks to high quality of material, front Ceresit plaster of the German production uses great popularity. Thanks to the special additives which are its part, high strength characteristics of material are provided. It is characterized by the increased moisture resistance, vapor permeability and elasticity. This covering has the long life cycle making about 20 years.
There are three types of textured front Ceresit plaster:
- the budgetary polymer cement mixes in which as binding component cement is used;
- mix with polymeric pitches which has high utilization properties;
- expensive polymer cement plasters which part cement, sand, polymeric synthetic additives, different plasticizers and fibers is.
Ceresit plasters with polymeric structure can be acrylic, silicone and silicate. Acrylic mixes are used in areas with high rainfall. Silicone plaster also well resists to moisture, steam, snow. Such facing covering differs in durability and durability. Silicate plaster for facade is strong linked to the basis, and shows resistance to deformations. She well transfers sunshine.
Thanks to wide color range of front Ceresit plasters, it is possible to choose the most suitable color which will create attractive exterior of the building. Here it is necessary to consider that very light shades quickly fade and become colourless, and too dark shades most strongly attract ultraviolet that promotes fast cracking.
Technology of wet plaster of facade
The technology of finishing of external walls of the building at which heater, the armored lattice and facing material fasten with use of semi-fluid or liquid structures is considered wet plaster of facade. Thanks to such finishing the dew point assuming condensate is taken out out of borders of the building that influences creation of favorable microclimate in the house. For wet facade use of adhesive substances including plasters is peculiar.
The wet plaster facade consists of three main layers:
Facade heater under plaster is fixed on the basis by means of adhesive substance. For this purpose portland cement structures which provide excellent adhesion of heater and the bearing basis are often applied.
It is very important to choose good front heater under plaster. There are several kinds of this material. The best option in this case is use of mineral wool, expanded polystyrene or plates of OSB. They provide moisture resistance and reliable heat preservation.
The basic layer is rigid layer which protects heater from negative impacts. Polymer cement solutions or the reinforced fiber glass grid act as layer.
Creation of decorative layer is putting front plaster on the prepared surface. Working costs on plaster of walls depend on drawing method (manual or machine) and invoices.
The main purpose of front plaster is the completing, finishing outside decoration of the walls of the building. This decorative coat is available at the price, long-lasting and has number of characteristic distinctive features that do it by one of the most popular facing materials.