Plaster the walls made of OSB boards. Application of decorative plaster on OSB

Many builders sheathe the outside of the house with OSB (OSB) boards. This material is affordable and differs high quality. When the time comes to carry out the final work, the craftsmen think about how to paint the OSB board on? For the right choice you need to study all possible options used for this product.

What is OSB board?

First OSB boards have already been created more than thirty years ago during mass construction of frame materials. Most residents of Canada, the USA and many Europeans live in such houses.

For the first houses built according to frame technology, was required reliable casing, resistant to sunlight and moisture. Wood was not suitable for this type of installation, as its installation took too much time and effort.

Plastering

This option for covering OSB panels is the most popular and justified for outdoor work. This type of finish has a number of features:

Siding

The use of sheathing with the installation of siding panels is economical way which helps improve the appearance of the building.

Siding can be reinforced installed surface OSB.

There are a large number of options for siding panels, so if you wish, you can choose a model that imitates a block house or brickwork.

The advantage of such cladding is that if OSB boards are already glued to the side of the facade, install smooth frame not necessary. However, you can't do without a membrane which will protect from wind and moisture.

If this additional fastening is not installed, the siding will periodically sweat from the inside, and the OSB will swell under the influence of moisture.

If you choose between two types - PVC or acrylic, then you can choose any type, since there are no significant differences between them.

Facing products are produced in one thickness, varying from 0.8 to 1.3 millimeters. They are able to withstand temperatures reaching 80 degrees Celsius, and exposure to sunlight, under which they do not fade.

Both types are highly resistant to the spread of fire and chemical reagents. Acrylic panels have a rich color, but otherwise are almost no different from PVC products.

Is it possible to attach siding directly to OSB? For practical advice on installing siding from professionals, watch the video:

How to plaster a slab outside the house?

The question of whether it is possible to putty the surface of OSB boards is controversial: some experts believe that this coating will not protect the product from the appearance of cracks on the surface of the facade. Others, on the contrary, recommend using additional coverage, because it will refresh gloomy wooden panels and serve as protection against moisture and dust.

Carrying out high-quality work on plastering the facade of the building can be done subject to the following conditions:

• the surface must be coated with an adhesive compound before carrying out work;
• the solution applied to the surface with a spatula should not be thinner than three millimeters;
• use of reinforcing mesh after applying the first layer;
• surface coating adhesive composition after the first layer has dried.

The surface of OSB slabs visually looks decent, and some home owners leave them at this stage and do not additional work on the cladding of the building.

Many experts still recommend covering the slabs with plaster - this will not only give the house individual features, but also protects against external damage. In order to perform plastering efficiently, you need to follow the sequence of work:

1. When applying the first layer, you should try to run a wide spatula along the wall to fill all the recesses on the OSB. For proper application, you need to move the tool along the wall in an arcuate motion. Completion of the first layer should not be accompanied by streaks along the surface to be coated.
2. After the first layer has completely dried, clean the wall with an abrasive mesh and repeat the application of putty.
3. In order to achieve an ideal surface with a smooth shine, you need to apply at least five successive layers.
4. After applying the putty, the surface must be dried, after which a layer of paint can be applied to it.

The question of what is the best way to carry out work on filling panels is even asked experienced craftsmen. The work process can be complicated by the fact that most putty materials do not adhere well to wood surfaces.

Therefore, you need to choose those coating models that have the highest adhesion to a wooden surface.

In order for the work to be completed successfully, it is recommended to pay attention on a mixture of Rodband and Goldband. These mixtures are made on a gypsum basis with admixtures of polymer materials.

If the owner of the premises wants to save on putty material, then it is better to purchase Rodband, its texture is more rigid than that of Goldband, and the price is much lower.

Selection finishing is also important and should be approached thoroughly. In order not to make a mistake with this choice, it is recommended to purchase Vitonit KR mixture.

Installation of porcelain tiles

Porcelain tiles are suitable for gluing to OSB walls, but is it necessary to carry out such serious work that can also cause damage to building structures?

Porcelain stoneware tiles are resistant to fungal growth, moisture and mold. One of the most important advantages This material is considered to be sustainable and has a wide range of products in stores. All these advantages are suitable for carrying out interior work, but not external ones.

OSB panels can be tiled indoors, for example on the floor, but external work is not recommended.

Craftsmen do not use porcelain stoneware in facade works ah one by one main reason – the wall surface must be ventilated in order to avoid waterlogging and swelling of the panels.

OSB coloring agents

In addition to water-repellent protection, paint coating provides a number of advantages for the surface:

• the coating can protect wooden surfaces from premature deformation;
• if large chips are noticeable on the surface of the wall, they can easily be hidden after applying the impregnating solution;
• Compared to other materials, painting is quite cheap and is not inferior in protective qualities.

Typically, for outdoor finishing, OSB-3 or OSB-4 is used, which are the most resistant to weather conditions. Not every owner can purchase OSB-4, since this material is highly expensive and resistant to mechanical stress. If the “four” is completely protected, then OSB-3 requires additional coating.

The boards are made from wood, which is the main component of the product, giving it environmental properties. At the same time such natural composition makes a wooden product vulnerable to the onslaught of weather conditions.

You can provide additional protection with siding, artificial stone, or the most common and easy-to-install material – paint.

When choosing a composition suitable for outdoor use, you can pay attention to all mixtures intended for working with wooden surfaces.

Avoid coatings that damage appearance facade. These include glazing substances and gloss varnishes. These compounds will show off and highlight the texture of the chips, which is not particularly attractive. Therefore, it is better to refuse such products.

The following compositions are suitable for coating OSB boards:

1. Latex compounds.

Latex paint contains substances that are most suitable for working with wood materials. After application, the paint is not subject to stretching and does not leave smudges. The disadvantage of this option is high cost of material.

2. Alkyd paint.

Often used in conducting similar works. Its peculiarity is that it looks attractive after being applied to the wall. This composition takes a long time to dry, sometimes up to eleven hours. The composition evaporates before it dries completely. bad smell. After drying the composition, the smell disappears.

Paint is capable withstand elevated temperatures, but is not resistant to fire and alkalis that get on the surface of the product.

3. Acrylic mixtures.

It is also often used, but if you read the composition of this paint, it will become obvious that it is not an ideal option for OSB coating because it contains water. Paints on water based in contact with OSB panels capable of spoiling their composition.

But if the panel is strong enough, then you can use an acrylic composition, which has undeniable advantages: resistance to sunlight, smooth coating and the ability to stay on the facade for more than eight years.

But it is important to remember that if you leave jars of paint at a low temperature, the composition will deteriorate, because water turns into ice. The composition without water will be unsuitable for further use.

4. Oil mixtures.

Previously they were widely used, but today they are almost out of use. This happened due to the displacement of this mixture by other more popular ones.

Oil suspensions toxic in composition, and the work has to be carried out in special masks or a respirator. The oil takes too long to dry and spreads over the painted surface, which of course requires additional effort to restore the wall and eliminate smudges.

After work on applying the suspension, rags often form that spoil the appearance of the facade. Another unpleasant property of this paint is the impossibility of covering it with a new composition that differs in components.

In order for the painting job to be completed safely and without additional effort and touch-ups, you need to remember a number of features of the wooden material:

• If there are sharp protrusions on the building, they will contribute to the spreading of the paint composition. If there are such corners, they need to be rounded, as in a plasterboard;
• the edges and joints of the slabs must be puttied to eliminate possible difficulties in applying and smoothing the wall;
• The question of whether it is necessary to prime the surface between the wood and the paint should not arise, because there is a clear answer to it - yes. This action is mandatory for precise adhesion between the paint and the material;
• if the owner wants to achieve an even application of the composition over the entire surface of the wall, he will need to carry out finishing putty on all slabs;

The number of times for applying paint is determined individually, but experts advise painting at least four times. After the paint is abundantly absorbed into the wooden surface, the color of the product will become saturated, and the strength of the composition will noticeably increase.

It is important to remember that each layer has its own time to dry, and you cannot start painting before the previous mixture has dried.

Exterior decoration frame house from OSB with paint - watch the video:

When building a house, you often have to think about saving money or mothballing construction for a certain period. One of these ways to save money or take a break to accumulate funds can be plastering the facades of a frame house.

Plaster finishing of facades wooden houses It became widespread in our country after the fire of 1812, and was often used until the beginning of the 20th century. Then this method of finishing facades was practically forgotten. But in the USA it was used until the 70s of the last century, until plastic siding appeared on the construction market.

Today there are two ways to apply plaster mixture to the facade of a house. The first, most common, is external walls the houses are covered with sheets of polystyrene foam and a plaster mixture is applied to them. At the same time, the thermal insulation and energy-saving characteristics of the house are improved.

Step 1. We go through all the joints of the OSB sheets with frost-resistant sealant, apply self-adhesive “serpyanka” over the seams, and putty.

Step 2. We prime all the walls. It is important that the primer allows the walls to “breathe” and does not isolate water vapor inside the house, for example, for this you can use the Knauf-Tiefengrunt primer or similar.

Step 3. Apply a thin first layer to pre-primed sheets outer skin, spread a fiberglass mesh on top, recess it a little into the first layer (in addition, the mesh can be “shot” with a construction stapler). Then we apply a second layer of plaster mixture.

Step 4. Painting the facades in the selected color. The paint used for facades should also not isolate water vapor in the wall.

IN frame housing construction OSB boards are widely used. Those located outdoors require protection from external influence atmosphere. Inside residential premises, the surface is finished in different ways: wallpaper is glued, painted, varnished. When using some options, it is necessary to putty the OSB in order to create a perfectly even base and protect the wood from the harmful effects of the products used and moisture.

Useful information about OSB boards - why putty them

OSB particle boards are 90% wood. A special manufacturing technology gives the structure greater strength and a beautiful surface. Despite these qualities, the material requires additional finishing. Puttying is not only the basis for subsequent decoration, but also protection from harmful effects environment. The peculiarity of the material, like any other natural wood, in susceptibility to water and its vapors.

For this reason, many people believe that OSB boards should not be puttyed, since the water contained in the mixture will cause swelling of the base and its deformation. Wallpapering and painting is also dangerous. Everything is correct, except for one thing: there is sufficient quantity modern mixtures, adhesives, paints that do not contain water. These are the ones that should be used.

Decorative putty hides the structure of the slab

In some cases, the natural appearance of the slabs may well suit the needs of utility rooms and outbuildings. Some people like a unique surface pattern, cover the slab with varnish - and that’s it. To make OSB look like solid walls, you can’t do without preparation. It is the putty that will create a perfectly even base for wallpaper, painting and decorative plaster. Paint or glue will not cause wood to swell.

What should the primer be?

There are no specially developed compositions for OSB. Conventional solutions are used, subject to certain requirements. Immediately exclude preparations containing water. After application, it is absorbed into the material, which begins to swell. Use only a primer intended for wooden surfaces. These are compositions with an acrylic, glyphthalic or gypsum base. They take into account the fact that putty will be applied, so alkyd products are not used - they are good for painting.

Primer for OSB boards – universal, deep penetration. Acrylic is the most suitable of them, used for painting and puttying. For unheated room additives are added to prevent the development of fungus. Some formulations, for example EuroPrimer, already contain such additives. Sold in concentrated form, diluted according to instructions before use.

The slabs contain resins and other substances that sometimes bleed through the finish and spoil the work done. To eliminate such a nuisance, quite complex technology is used. First, an insulating paint is applied (example: Aqua-Deck E.L.F.), then a dispersion putty containing synthetic resin. Allow to dry for 12 hours and stick on special material for bonding cracks in putty: Variovlies A 50 Basic. After such preparation, no stains will appear.

In some cases, an adhesive primer is used - Concrete Contact. It differs from other compositions in the content of quartz sand, which makes the surface not smooth, but with slight irregularities. It is used when decorative plaster or tile. Thanks to the unusual filler, adhesion is significantly improved. When applied with a poppy brush or long-haired roller, other tools do not ensure uniform distribution of the composition over the slab.

It is recommended to mix all soils before use, but in the case of Concrete Contact this is a very important operation. Quartz sand settles quickly; if the process is not carried out very carefully, the mixture will turn out to be heterogeneous. Moreover, when working, this procedure is repeated every 10 minutes; only under such conditions will the coating be of high quality.

Among other primers, professionals recommend:

• varnish on acrylic base for wooden surfaces, which is diluted with solvent in a ratio of 1:10;
• latex - after drying, a thin film is formed that prevents the penetration of resins;
• alkyd varnish diluted to a more liquid state with white spirit.

In addition to choosing the right primer, it is important to apply it according to the technology:

1. 1. The plates are cleaned. Dried dirt is wiped off with a damp cloth, the rest is removed with a vacuum cleaner or broom.
2. 2. Seal the joints. It is possible to use acrylic sealant or polyurethane foam. The excess is removed with a knife, and the sealant is treated with sandpaper.
3. 3. The prepared composition is applied to OSB. Usually they start with the joints, process them with special care, then move on to the rest of the surface.

The quality of priming depends on the patience of the master. Do not apply immediately thick layer, this will have no effect. It is recommended to repeat the operation three times, carefully distributing the drug over the surface. Let it dry thoroughly each time. How long it takes depends on the air temperature and the properties of the composition and thickness of the layer. You'll have to be patient and do something else, but the quality will be excellent.

Requirements for putty and its choice

1. 1. Acrylic. Levels any surfaces, including OSB.
2. 2. Nitro putty. A quick-drying composition containing cellulose, resin, plasticizers, fillers. Before use, dilute with solvents recommended by the manufacturer.
3. 3. Oil-adhesive – containing varnishes, glue, additives, oil and plasticizers. Dissolve with drying oil.
4. 4. Gypsum with polymers. Considered the best for working with wooden surfaces.
5. 5. Dispersed with synthetic resin. Highly elastic, used for finishing plaster.

The listed types of putties must have certain properties. Before purchasing, it is recommended that you read the instructions on the packaging and pay attention to the characteristics. Among these, of particular importance is the very high degree adhesion, because not every composition will adhere to the resinous surface. When preparing for use, it is important to achieve a uniform consistency. Coating requirements include durability and sandability.

If you need to putty small areas, then the cost of the compounds is not particularly sensitive. When finishing the entire house built using frame technology, it hits the budget. I have a recipe self-made composition, which is used by some masters. It consists of inexpensive components:

• oils: 2.8 kg of linseed and 0.6 kg of turpentine;
• 0.3 kg ground pumice;
• 0.2 kg of gelatin and the same amount of casein;
• 170 ml of ammonia solution;
• 3 liters of water. Pumice is crushed into dust, the mass is poured into linseed oil and stir until smooth. Pour in turpentine oil and stir again. When the mixture has steeped for 10 minutes, add everything else. Heat in a water bath, stir, infuse, repeat again until homogeneity is achieved.

Puttying technology - process sequence

The work is not particularly complicated and repeats all operations applied to other surfaces. Theory alone is not enough to cope with the finishing of capricious materials. For those who have some experience in puttying, it is useful to familiarize yourself with the video material, which will tell you about the features of working with OSB.

Operations are carried out in the proposed sequence to avoid mistakes and not miss anything. Begin by sanding the surface, joints and ends with fine-grained sandpaper. Remove dust and be sure to prime. After processing with compounds, it is created protective film, preventing resins and other substances from reacting with the finishing material.

Sealing joints at the beginning of work

After the last, third layer has dried, puttying begins. The work is carried out at a temperature of +1° or more and in relatively dry air in which dampness is not felt. The composition is placed on a tray and applied to the slabs with a spatula. Having processed small area, level the coating, remove excess. This is done until the putty has set.

Tools of different widths are used. Using a narrow spatula, spread the composition over a large area. Holding it at an angle to the surface, smooth the mixture evenly. The next portion should overlap the previous one without too noticeable transitions. A layer of more than 2 mm is not allowed: this is not only a waste of material, but also a risk of cracking. The putty is allowed to dry for 3–12 hours depending on humidity and temperature.

Then the surface is polished, eliminating irregularities. If noticeable depressions remain, correct by applying the composition and repeat the previous operations. When an acceptable result is achieved, it is painted or wallpapered. Sometimes reinforcement with non-woven fabric is required. The individual pieces are overlapped, then the joints are cut and the excess is removed.

Plastering OSB - how to do it right

This operation is used mainly outside to protect the slabs from mechanical damage, sun, rain and wind. Vapor-tight plaster allows the material to breathe, condensation does not accumulate, and there are no favorable conditions for mold development. Often the walls are insulated at the same time, which significantly reduces heating costs and increases sound insulation.

Different solutions are used:

• universal cement-sand, which is suitable for all surfaces;
• polymer compositions characterized by high adhesive characteristics;
• plaster for interior decoration;
• lime for plastering wet areas.

All mixtures are diluted with water, so there is a risk of deformation wood boards and rejection of the finishing layer. To avoid such consequences, create an insulating ceiling using one of the options. In the first case, the insulation is fixed. The second method is to use kraft paper or bitumen-impregnated cardboard.

Plastering OSB is carried out over a reinforced mesh

For tiled heat insulators, the surface is pre-cleaned and degreased with white spirit. Then the adhesive is applied and the insulation is fixed. Kraft paper or asphalt cardboard is stapled using a stapler. Plastering on the facade in both cases is carried out over a reinforcing mesh made of plastic or fiberglass.

The technology is standard, but there are some features. A spatula is used, and the next layer is applied after the previous one has hardened. The use of special mixtures will make the process easier, because working with those prepared by yourself is difficult, especially without sufficient experience.

Video material will help you get acquainted in detail with the features of OSB plastering.

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Video on how to apply decorative plaster on an OSB board

Finishing the house with OSB from the outside: methods of finishing OSB sheets: painting, plaster, artificial stone, siding.

OSB boards or otherwise OSB sheets are widely used for the construction of walls in houses, in particular in frame construction. Therefore their question exterior finishing very relevant today. Moreover, not only from an aesthetic point of view, but also in terms of protecting the material from negative impact external factors (high humidity, sudden temperature changes, solar radiation and others).

In this article we will look at the following question: OSB finishing on the outside Houses.

OSB finishing on the outside

Finishing walls from OSB boards outside the house: how to finish OSB walls

There are a lot in various ways finishing walls from OSB sheets outside the house. They all take into account OSB features slabs that are subject to the same deformations as wood.

Among the main methods used for external finishing of walls made of OSB sheets are the following:

Painting a house made of OSB

Painting is the simplest and most common option, which does not require a lot of time and money. Water-based or oil paints woodworking for external work. In order for the coating to adhere well, it is important to properly prepare the surface for painting. First of all, it is recommended to seal the interpanel seams with acrylic sealant, and then thoroughly clean and prime the entire surface of the slabs. The paint is applied in several layers. Each of them must be given time to dry thoroughly before applying the next layer.

Painting OSB boards

To paint OSB boards, you can use a brush or roller.

Applying plaster to pox boards

Plaster allows you to extend the life of the slab and additionally protects it from fire. OSB boards can change their geometric dimensions over wide ranges due to changes in humidity and ambient temperature. If you apply plaster directly to the OSB board, it will soon become covered with cracks and peel off from the base. Therefore, two main technologies are used: the use of an intermediate layer and layer-by-layer application of plaster.

Plaster OSB boards

Expanded polystyrene or glassine can be used as an intermediate layer. Expanded polystyrene has good moisture insulation and further improves thermal insulation properties walls. Glassine or bitumen cardboard has a low price.

To prepare the base, sealant is applied to the joints between the sheets. The sheets themselves are primed. After this, an intermediate layer in the form of polystyrene foam or glassine is glued. A reinforcing mesh is attached on top of this layer and a layer of plaster is applied.

When applying plaster directly to OSB sheets, the process is divided into several stages. After preparing the base, as in the previous version, proceed to the first stage. During which the first layer of plaster is applied, a reinforcing mesh is embedded in it. After drying, apply another layer. After this, a leveling layer is applied.

The option without an intermediate layer is less reliable and after 2-3 years the plaster may begin to peel off, so it is usually recommended to use an intermediate layer.

Installation decorative stone on osb boards

Artificial stone is one of the most complex and expensive finishing methods. However, the excellent appearance of the finished facade and the durability of such a coating will certainly pay for itself over time. Stages of work:

1. Before starting work, the seams of OSB boards are filled with frost-resistant sealant, and the boards are primed.
2. Polystyrene foam is glued on top.
3. Then it must be filled with frost-resistant putty.
4. Then apply two layers of glue. Place the reinforcing mesh into the first one.
5. Place decorative stone on the second layer.

Finishing OSB boards with decorative stone

Sometimes decorative stone is glued without an intermediate layer in the form of polystyrene foam. This option is less reliable and after 2-3 years the coating begins to peel off.

Fastening siding to OSB boards

Siding – universal method finishing that can be used for any facade. The material has an affordable price and excellent appearance. Provided that the OSB board has a flat surface, fastening the sheathing is optional. At the same time, so that during operation the material does not swell from the condensation formed, it is important not to forget to install a windproof, waterproof membrane between the slabs and the siding.

Decorative façade panels

Decorative facade panels have a wide range of modifications and are made using various materials: wood, metal, plastic, glass. The technology for installing such panels depends on the panels themselves. Most often used for fastening are: dowel fasteners, brackets and metal profiles.

Installation of decorative panels on the walls of an OSB house

Each of the listed methods has its own advantages and disadvantages. It doesn't matter which one you choose. The main thing is to strictly adhere to the recommendations of specialists and the correct technology.

Finishing OSB on the outside: methods and technologies for finishing OSB on the outside
Finishing OSB outside: methods and technologies for finishing OSB outside | Finishing houses osb outside: methods of finishing OSB sheets: painting, plastering, fake diamond, siding | How to finish walls made of OSB boards outside the house.

Frame houses are fast and affordable way get your own home. But such buildings require a more careful selection of materials to perform insulation and decorating work.

Those who choose plastering are wondering whether to lay plaster on an OSB board on the facade or not, and what compositions are best to choose?

Features of using plaster

Oriented- particle boards(OSB, OSB) must be protected from external negative influences. Because decorative finishing should have the following advantages:

1. Resistant to high humidity.
2. Tolerance of sudden and frequent temperature changes.
3. Mechanical reliability.
4. Heat and sound insulation properties.
5. Affordable price.
6. Duration of operation.
7. Light weight.

Therefore, to the question whether it is possible to plaster an OSB board, the answer is definitely possible and necessary, since this type of finishing has all the listed characteristics. The main thing to remember is that wood absorbs moisture quickly and a lot, even if it is coated with a moisture-repellent composition.

Before plastering the base, it must be protected with a special layer that will not allow moisture to pass through from the solution. This layer can be bitumen cardboard, paper-based roofing felt, kraft paper or an elastic polymer coating.

Traditional way

This option involves extensive preparation. Without this, OSB boards will constantly be exposed to moisture, which the plastered layer absorbs and transfers to the base.

IN preparatory stage includes:

• Fastening on a base of moisture-proof material. As mentioned above, this can be asphalt cardboard, roofing felt, kraft paper or polymer coating.
• Installation of reinforcing mesh. It can be fiberglass or galvanized steel mesh. She's getting flooded special glue, so that the composition completely covers the reinforcing layer.
• After the glue has completely dried, the surface must be treated with deep penetration primer to increase adhesion.

After waiting for the applied primer to dry completely, you can plaster the OSB boards using silicate or mineral mixtures. They have good long service life, decorative and protective properties.

The solution is applied thin layer from 1.5 to 5 mm. Therefore, this process is reminiscent of applying putty. This type of plastering of OSB boards requires time and Money. But, once everything is done efficiently, the owner can forget about repair work for a long time.

Insulation and plastering

If you don’t want to bother with a lot of layers, you still need to decorate the facade and you can use another finishing method. To do this, you will need to purchase polyurethane foam in sheets. Fix it securely to the base. It will perform the functions of thermal insulation.

To attach the insulation, you can use a special glue for external work. When choosing an adhesive composition, pay attention to whether it can be used for polyurethane foam.

A thin layer of plaster solution is applied to the insulation, and reinforcing fiberglass is laid on top of the wet layer and pressed in, leveling the applied solution. After this layer has dried, apply a little more solution in order to hide the places where the mesh may be visible.

After drying, you need to rub and paint the surface. For painting it is better to choose acrylic paint.

Polymer compositions for plastering

The most in a fast way apply plaster to OSB surface slabs will use polymer compounds based on acrylic or latex synthetic resin. They are available in the form of ready-made solutions. After opening the container, everything must be used very quickly. Because the plaster sets quickly and it is impossible to dilute or restore the original consistency.

Now let’s figure out how to plaster an OSB board in this way.

• Grinding. To do this, choose coarse-grain sandpaper. At the same time, all elements that protrude beyond the surface of the slab and do not connect well with it are removed.
• Primer. After sanding, the slab is cleaned of dust and covered with deep penetration primer intended for wooden surfaces. This will not only protect the wood from moisture, but will also increase adhesion, which means the plaster solution will be easier to apply.
• If there are any unevenness on the OSB board or there are gaps at the joints, then after the soil has dried they are treated with acrylic sealant. The composition is sent into the uneven area and carefully leveled with a spatula. This process will allow you to use less polymer plaster.
• Plastering. After the sealing layer has dried, begin application. ready-made composition. The solution is applied to the wall and leveled to obtain a layer 5 mm thick. You need to work quickly.

The polymer layer of plaster does not require painting, but if desired, the owner can change the color of the finish at any time. This method of decorating OSB boards is expensive, but its service life of over 25 years makes it possible to eliminate this disadvantage.

The compositions that are used for plastering slabs harden very quickly, so if the owner does not have experience in this area, then it is better to use the work of a professional team.

Rules for applying plaster on OSB boards for facade finishing
Owners frame houses they ask the question of how to properly apply plaster on an OSB board for finishing the facade. After all, this good way extend the life of the building and make it attractive.

Oriented strand boards (OSB, OSB or OSB), invented in Canada during the era of mass construction of frame residential buildings, have also become interested in Russia. Lightweight, fairly durable slabs are used both for cladding facades and for interior decoration. It is quite understandable that they are trying to improve the nondescript surface of glued chips decorative materials. One of the popular ways to achieve this is by applying protective plaster over an OSB board on the facade of your house.

Is it possible to plaster OSB

Having decided to clad the façade of their house with OSB or use particle boards indoors, homeowners carefully consider their finishing options. At the same time, the question of whether it is possible to plaster an OSB board is the first to arise in most cases. After all, if you neglect decorativeness and leave OSB without an external coating (especially on the facade), then even wood coated with water-repellent compounds will absorb moisture.

This water is enough to swell the slab in summer and defrost in winter. The OSB will darken, warp and lose its strength. In addition, a serious disadvantage of OSB is the chemical component of the binder, which is why the boards must be protected from temperatures above +30°C. Therefore, from the moment the production of slabs began, builders began to think about a protective coating for them.

The most commonly used types of finishes are:

• painting (the cheapest and easiest option);
• wallpapering (suitable only indoors);
• cladding with decorative panels attached directly to the slabs (a rather expensive method that does not solve all the problems of preserving smallpox);
• covering with siding (does not eliminate the problem of flammability of slabs, requires additional measures for vapor barrier of OSB);
• tiling (suitable for indoors, but “blocks oxygen” to wood);
• facing slabs with a coating of decorative stone (the most expensive and time-consuming method);
• plastering.

Types of OSB board finishes

Properties that must have protective covering for OSB:

• waterproof and waterproof;
• sufficient mechanical strength;
• temperature stability (withstand sudden changes);
• vapor permeability;
• environmental friendliness;
• fire safety;
• long service life;
• maintainability;
• unattractive to mold, mildew and rodents;
• resistance to solar radiation;
• light weight;
• affordable price;
• simple operation without extra costs;
• opportunity to do it yourself.

Why do OSB panels need to be plastered?

Plaster has all of the above properties.

Plaster coating Also:

• serves as additional heat and sound insulation;
• forms a monolithic coating that hides seams and surface defects;
• can give the building a unique look.

Therefore, private owners actively use OSB plaster on the facade and for interior decoration.

Having correctly plastered the wood chip slabs once, they forget about repairs for a long time. And if you get tired of the appearance, you can easily change it by painting it in new colors. This coating is easy to clean, reliable, and does not allow drafts.

What plaster is used for OSB boards

If plaster is the finishing touch to the “layer cake” - a composite coating of OSB, then there are particularly difficult problems with choosing plaster composition, as a rule, does not arise. Therefore, speaking about plasters, we will touch upon conventional compositions based on various binders. In addition, there are compositions specifically designed for plastering OSB.

Layer cake pattern

Using foam plastic for insulation wooden structures possible but not advisable!

Plaster mixtures are divided into types:

• leveling (roughing);
• decorative (finishing);
• special (waterproofing, etc.)

Plaster mixtures are divided by area of ​​application into:

• internal (for use only in heated rooms);
• external (used for facades, as well as indoors);
• universal.

All compositions have a base: binders, filler (natural or artificial particles that make up most volume), certain functional additives.

Mineral

• silicone (vapor-permeable, waterproof);
• siloxane (water resistance lasts only 3-5 years);
• polymer cement (filler – polymer fibers);
• and others.

Binding components are polymers.

Basics of two types:

• water soluble;
• soluble in organic diluents.

The prices of the compositions are higher than the prices of mineral mixtures.

Decorative

Specially formulated mixtures for decorative work.

The following types of mixtures are produced for facades and premises:

• stone (and plasters);
• flock;
• colored;

The decorative effect is achieved by methods of layer processing, or due to the type of filler.

Methods for plastering OSB boards

When applying the plaster layer, the following problems may occur:

• absorption of moisture from the solution by wood;
• the formation of cracks in the plaster coating due to the “play” of wood when moistened;
• difficulties in ensuring reliable adhesion.

These problems are solved in various ways. There are two main methods of plastering OSB:

• without insulation;
• with insulation.

In both cases, OSB boards must be firmly fixed to the wall to prevent significant movement during work and during shrinkage.

Traditional way

Information on how to plaster oriented strand sheet material without insulation is provided as an extreme option, which it is advisable to avoid. A plaster coating without insulation can cause a lot of trouble for the property owner during operation.

For plastering you will need:

• membrane vapor-permeable material, for example, Tyvek StuccoWap;
• broaching mesh for reinforcement;
• adhesive composition;
• plaster mixture.

Sequence of work:

1. A membrane panel is attached to the surface of the OSB with a stapler. The panels are joined with an overlap (10 cm) using glue or double-sided tape.
2. A reinforcing mesh is placed on top, attached to the OSB.
3. Apply a layer of adhesive (to completely immerse the mesh in the composition, two layers must be applied).
4. A primer is applied to the dried glue to increase adhesion (preferably deep penetration).
5. Plaster the dried surface.

Scheme standard method OSB plaster

For this method, it is especially important to use an elastic plaster composition from a trusted manufacturer, otherwise the plaster layer will crack due to the “movements” of the wood surface. Most often, cracks occur at the joints of OSB. Instead of a membrane, you can use roofing felt, kraft paper or bitumen cardboard.

Another way to protect OSB is to putty it under plaster. Putty is similar to plaster mortar, only its filler is a very fine fraction (practically, stone flour). Before puttying, the chip surface is sanded, cleaned of dust and primed. Not just any primer is suitable, but wood compositions that do not contain water. Then, applying the primer will not remove moisture from the slab.

puttying OSB under plaster

The primer mixture is applied with a roller twice, allowing each layer to dry. After applying the primer and drying it, a reinforcing mesh is stapled onto the surface of the OSB and puttyed. The mesh should be inside the putty. After the putty has dried, the chip surfaces are plastered with elastic, vapor-permeable, decorative compounds.

The most vulnerable areas of OSB to moisture penetration are the ends. They must be thoroughly primed before installing the sheets.

Insulation and plastering

Insulation is usually carried out outside the building. For example, to plaster OSB slabs, 40 mm thick sheets are used as insulation.

Subsequence:

1. Sheets of insulation are glued onto the prepared OSB surface. After the glue has dried, the sheets are fixed with mushroom dowels, recessing the caps into the foam. The joints between the sheets of foam plastic are foamed, the foam protruding above the surface is cut off.
2. Apply the adhesive composition in a layer of 3 mm, apply the mesh, straighten it, smooth it with a wide spatula, immersing the mesh fabric in the solution. The solution that protrudes over the mesh is leveled.
3. After the adhesive solution has dried, the prepared plaster mixture is applied.

Installation of foam plastic Fixing dowels with mushrooms Foaming foam joints
Fastening the reinforcing mesh Applying the plaster mixture

The method resembles a technique Wet facade. Therefore, the nuances of implementation can be found in the corresponding article.

Using drywall

Gypsum plasterboard sheets (GKL) are classified as dry plasters. Tandem plasterboard + OSB does not ignite and can significantly reduce noise than a separate OSB. You can attach drywall to OSB indoors directly (without a guide frame). In this case, the OSB is secured with self-tapping screws to the guides. The gypsum boards are secured with self-tapping screws through OSB to the same guides.

But the joints of OSB and gypsum board should not match. Drywall can even be glued to OSB and then secured with self-tapping screws. GK sheets are well puttied and plastered. Almost all types of plaster mixtures are suitable for plastering. There is no need to install a vapor barrier under the gypsum plasterboard in dry rooms.

Features of plastering indoors and on the façade of a building

In addition to the fact that the plastering materials used and plastering of OSB boards, performed indoors, differ from plastering outdoors in working conditions. During facade plastering work, select several days of dry, windless, warm weather. The workplace is covered with a canopy from the sun and unexpected rain. The air temperature should be above +5, but not more than +35°C.

Indoor conditions are more comfortable. Here great importance humidity plays a role (no more than 65%), absence of drafts. Fans and heaters cannot be used to speed up the drying process of plaster solutions. Violation of the conditions will lead to the appearance of cracks. Before plastering, de-energize the electrical wiring.

Tool

Basically, the same tools are used as for other types of plastering:

• spatulas (with a metal working part);
• trowel;
• grater for grinding (with sandpaper);
• level;
• containers;
• short-hair roller;
• mixer;
• brush;
• masking tape;
• rags.

OSB surface preparation

OS boards may be dusty and dirty. It is necessary to sand the surface, remove dust and dirt stains. Since wood material cannot be washed, special products containing organic solvents, such as white spirit, are used for cleaning. The seams are sealed (the sealant for OSB is elastic, since the slab must have an expansion gap on the sides), primed and puttied to obtain a flat surface.

Sealing seams between slabs with sealant

Step-by-step plastering technology

Plaster on OSB board on the facade in sequence:

1. After installation particle boards inspect the surface of the wall.
2. Clean the surface from dirt and stains.
3. Sand the protrusions. They go over the panels with a vacuum cleaner, removing dust.
4. Coat the joints with an elastic sealant.
5. The seams are puttied and smoothed. The wall is being dried.
6. Apply primer with a brush or roller. Dry.
7. A vapor barrier material is applied (roofing felt, membrane sheet, etc.). Fixed with a stapler.
8. Apply a 3 mm layer of adhesive composition (for example, Ceresit ST85) to the surface with a spatula.
9. Apply a reinforcing mesh, straighten the canvas, and press it into the adhesive solution with a spatula. Make sure that there is a layer of glue between the mesh and the base. The mesh should not “whiten” over the adhesive composition. If necessary, coat the top with the solution.
10. A day later, a millimeter layer of the adhesive mixture is applied over the mesh (for leveling). Dry.
11. Prime with a composition from the same manufacturer (for example, ceresit ST16). Dry the primer.
12. They begin finishing plastering work. Apply a plaster solution (from a ruler decorative compositions same manufacturer), form the surface in the manner chosen to create the desired effect.
13. The dried finish is painted or varnished.

When working with OSB, the room is ventilated. But during plastering works drafts should not be allowed - plastered surfaces need " greenhouse conditions", otherwise cracks will appear.

Plastering on OSB is one of the ways to protect and decorate particle boards.

We hope that the information on how to plaster OSB will help you complete the work correctly. The appearance and durability of the cladding of your home depends on compliance with the technology.