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Plastering on the OSB slab on the facade: is it possible and how to plaster the OSB slab?

Frame houses are a quick and affordable way to get your own home. But such buildings require a more careful selection of materials for the performance of insulation and decoration work.

Those who choose plastering are wondering whether the plaster should be laid on the OSB slab on the facade or not, and which compositions are better to choose?

Features of using plaster

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

Resistant to high humidity.
Tolerance to sudden and frequent temperature changes.
Mechanical reliability.
Heat and sound insulation properties.
Affordable price.
Duration of operation.
Low weight.

Therefore, when asked whether it is possible to plaster an OSB slab, the answer is that it is definitely possible and necessary, since this type of finish has all the listed characteristics. The main thing to remember is that wood absorbs moisture quickly and a lot, even if it is covered with a moisture-repellent compound.

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

The traditional way

This option involves a lengthy preparation process. Without this, OSB boards will constantly be exposed to moisture, which is absorbed by the plastered layer and transferred to the base.

The preparatory stage includes:

Fixing on the base of waterproof material. As mentioned above, this can be bituminous cardboard, roofing felt, kraft paper or polymer coating.
Reinforcing mesh installation. It can be fiberglass or galvanized steel mesh. It is poured with special glue so that the composition completely covers the reinforcing layer.
After the adhesive is completely dry, the surface should be treated with a deep penetration primer to improve 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 mortar is applied in a thin layer of 1.5 to 5 mm. Therefore, this process resembles the application of a putty. Such plaster of OSB boards requires a lot of time and money. But, once having done everything efficiently, the owner can forget about the repair work for a long time.

Warming and plastering

If you don't want to deal with debts with a large number 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 on the base. It will act as thermal insulation.

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

A thin layer of plaster is applied to the insulation, and reinforcing fiberglass is placed on top of the wet layer and pressed, leveling the applied solution. After this layer has dried, a little more solution is applied in order to hide the places where the mesh can show through.

After drying, you need to wipe the surface with paint. For coloring, it is better to choose acrylic paint.

Polymer compounds for plastering

The fastest way to apply plaster to the surface of OSB boards is to use polymer compounds based on acrylic or latex synthetic resin. They are available as ready-made solutions. After opening the container, everything needs to be used very quickly. Because the plaster sets quickly and it is impossible to dilute or restore the initial consistency.

Now let's figure out how to plaster the OSB slab in this way.

Grinding. To do this, choose coarse sandpaper. This removes all elements that protrude beyond the surface of the slab and poorly connect to it.
Primer. After sanding, the slab is cleaned of dust and covered with a deep penetration primer intended for wood surfaces. This not only protects the wood from moisture, but also increases adhesion, which means that the plaster solution will be easier to lay down.
If there are irregularities on the OSB plate or there are gaps at the joints, then after the soil has dried, they are treated with acrylic sealant. The composition is sent to the unevenness and carefully leveled with a spatula. This process will allow you to use less polymer plaster.
Plastering. After the sealing layer has dried, proceed to the application of the finished composition. The mortar is applied to the wall and leveled to a 5 mm layer. You need to work quickly.

The polymer layer of plaster does not require staining, 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, over 25 years, makes it possible to level this drawback.

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

Source: https://1pofasadu.ru/shtukaturka/po-osb-plite-na-fasade.html

Nuances of plastering OSB boards

Today frame structures are widely used in construction because they are lightweight and easy to use. For cladding such structures, OSB plates are used. They are inexpensive and the thermal insulation they provide exceeds all expectations. Various commercially available materials can be used to finish these surfaces. Nevertheless, there are nuances that prevent the use of some of them. One of the most common questions - is it possible to plaster OSB? Let's try to answer it and make good recommendations.

Why do OSB panels need to be plastered?

Plastered coatings can be provided with excellent protection against external negative factors and mechanical damage. Including:

from wind forces;
from the sun's rays;
from precipitation.

Vapor-permeable plaster mixes allow OSB to breathe and not accumulate condensation, which reduces the risk of mold formation. In addition, insulation is often used in conjunction with plaster. With the simultaneous use of room plaster and insulation, it is provided:

reducing the cost of heating a building or structure by almost half;
increasing the sound insulation properties by almost 2 times.

Is it possible to plaster OSB boards on your own? Sure. The main thing is to choose the right type of the proposed plaster mixture, because each has its own advantages and disadvantages. Based on some data and features of operation, you can make a proper choice.

Cement-sand mortar is universal and perfect for any base, for example, brick or concrete, even a wooden surface can be leveled with it, but during preparatory work.

Preparatory work

In preparation for work, it is necessary to analyze how the sheets will be fastened, that is, the basis. This must be clearly performed in accordance with the requirements of building codes, and it is not recommended to independently reduce or increase the number of arrangement of elements.

OSB boards must be fastened firmly enough to prevent their movement. The presence of vibration and mobility of the base are the main negative factors affecting any structure. It is important to know that the use of additional fasteners to strengthen the structure cannot be used.

OSB are sheets that are made of wood shavings. By themselves, they absorb water, and the plaster coating is rejected. Without preparation, the surface will be covered with a network of cracks, and the solution will gradually flake off. The creation of a special insulating floor between the slab and the cover layer will help to avoid this problem.

There are 2 types of insulation coating in total:

Fastening the insulation.
Covering the surface with kraft paper or cardboard impregnated with bitumen.

Fastening insulation

External insulation is made with expanded polystyrene or mineral wool sheets. The insulation is fixed directly to the walls. Then the well-known operations are performed:

reinforcing mesh is installed;
an adhesive is applied;
the surface is primed;
plastering is performed.

As for the insulation from the inside, then most often polystyrene sheets are attached to the walls. This is the most successful solution for creating layer reliability, they do not allow moisture to pass through. Gluing is done with glue, which is accessible even to an inexperienced worker.

The fastening technology is simple:

The surface is degreased from oil and dirty inclusions using white spirit.
The glue base is applied with a special calibration spatula.
This is followed by pressing the insulation to the base.
It is necessary to wait until the adhesive has dried.
The base is reinforced by installing a plastic or fiberglass mesh with a self-adhesive base.

If it is simpler, then first a heater is attached to the OSB plate, then a reinforcing mesh, and only then they are plastered.

Upholstery fixing

To begin with, all joints are coated with a sealant, after which they are laid with kraft paper or cardboard soaked in bitumen. Fastening is carried out with a stapler on staples. A mesh (plastic or fiberglass) is then fixed to the surface.

This is the most economical option, but the thermal insulation properties are still lower, however, with the help of internal insulation, this problem can also be solved.

Plastering technology

How to plaster the surface? The work process itself is standard, but there are some nuances:

The plastering solution is applied with a trowel.
Application is carried out in several layers, while the preliminary layer must gain strength.

Plastering an OSB slab is quite difficult, in this you need to have certain skills in carrying out work, otherwise there will be no impressions from work. Modern manufacturers offer the use of new formulations in the range. They are easy enough to use, and even a non-professional can handle them.

The production process itself is more similar to the filling of walls. It is suitable for both outdoor and indoor work. The plaster layer is applied with a spatula, with a thickness of 1.5 to 5 mm.

Important! For the production of finishing works, compositions are used that have high adhesion properties. Usually these are polymer-based mixtures. When they are applied, fungus does not appear, and, accordingly, the plaster remains for a long time.

Such plaster mixes are produced in several types. For processing a wooden base, it is latex or acrylic. Their application requires preparatory operations:

The outer surface is sanded using fine emery paper.
After that, a primer layer is applied. This is necessary to create strength and improve adhesion to the next layer of surface treatment.
Next, plaster mixes are applied.

On a flat cement plaster base, a polymer composition can also be used. In terms of price characteristics, this requires much more investment, however, it will last for many years, more than 25 years. During this time, all the properties of the plaster are preserved.

In the video: putty for sip sip panel and OSB.

Positive and negative sides

It is necessary to apply a plaster layer on the slab, since the house will last longer, and its appearance will instantly change and, accordingly, the cost will increase. Depending on the possibility of purchasing the material, you can evaluate the quality characteristics.

In any case, if the owner buys OSB plates, then he saves on money. Of all the types of coverage, the most expensive option can be preferred:

plastering walls with polymer plaster with high bonding qualities;
with a pungent smell of oils and solvents or oil and glue;
surface finishing with polyurethane foam sheets, followed by plastering each using a cement, gypsum or lime mixture;
insulation of the facade before direct plastering.

A slab trimmed with OSB plaster mortar is needed inside the room, especially since it is not exposed to external negative factors. But even in this case, it is necessary to pay attention to the quality of the insulated facade, the availability of ventilation and heating in the room.

Safety engineering

How to plaster a wall correctly, beautifully and so that there is no harm to health? To do this, you must follow simple requirements:

You should work only in special clothes and shoes, you can use old things, if only the material is dense enough and allows air to pass through.
A headdress is also required, if plastic mass gets on the hair, it will be difficult to rinse it.
Gloves should be worn on hands, although many do not want to use them. From the effects of plaster, the skin dries greatly, and more than one tube of cream will be needed to soften it. Bare hands are more susceptible to injury than those covered with gloves.
Do not neglect goggles, because even minor splashes in the eyes can spoil the idea of repair.
In any case, you will have to use scaffolding tools, for example, a chair, table or ladder. It is impossible to carry out work on the direct application of plaster from the stairs, since a horizontal force is applied and there is a risk of falling.

It is important that the scaffold is firmly on the floor or other base. If you feel dizzy or you feel unwell, then it is better to pause and not get up to a height. Own safety is in the hands of the owner himself.

Source: https://GidPoKraske.ru/oshtukaturivanie/mozhno-li-shtukaturit-osb.html

Osb slabs plaster

The subject of numerous discussions of those who build houses or make repairs with their own hands was the question of whether it is possible to plaster OSB slabs without spending additional materials and efforts for this.

Plaster is a great way to improve and strengthen residential buildings erected using frame technology, to equip and insulate walls.

Expensive building materials can be successfully replaced with OSB wood-based panels. The practice of using them for external walls is widespread.

The popularity of the use of OSB boards

OSB is a popular material in the construction of frame houses

OSB slabs for exterior decoration of the facade and living quarters are an excellent alternative, affordable and affordable. Every type of building and every building material has positive and negative sides.

The lightness and thermal insulation properties of boards made from layers of wood chips are an indisputable advantage, but, according to builders, such walls require additional decorative finishing.

Simple plaster on the OSB board does not solve the intended tasks of long-term operation, quickly deteriorates, deforms the main building material.

A house made of OSB-plates must have good ventilation.

The popularity in use and the breadth of application of the OSB boards were obtained due to their technical characteristics. They are made from wood shavings and chips, pressed under high pressure and bonded with synthetic resins with water-resistant characteristics that have undergone heat treatment.

The multi-layer and versatile orientation of the layer-by-layer stacking of chip plates makes it possible to withstand significant loads. The number of layers and the method of bonding the filler have led to the emergence of technological varieties for which there is always a demand. Several types are produced for the decoration of facades, and make it possible to use without additional finishing.

Plastered and plastered walls gain additional reliability

The low vapor permeability of the material used mainly for frame buildings is solved by arranging a good ventilation system in the building. Toxicity of resins, this problem is solved by choosing from a bona fide manufacturer. In country houses, the slabs are sometimes left in their original form, covered with varnish or oil-based paint.

In residential buildings, the decorative component is important, therefore the owners of houses prefer to plaster the walls. Thus, additional reliability is provided. Although a residential building does not visually differ from more expensive buildings.

To improve adhesion, the base must be primed

The adhesion of particle boards to finishing materials is extremely low, leveling with a putty requires an additional layer of primer, and plastering on an OSB board requires not only a careful choice of building materials, but also knowledge of some of the intricacies of the process.

But the owners of houses, in which they are going to live for a long time and without annual repairs, prefer to spend time once and do everything soundly and efficiently.

Preliminary preparation of walls made of OSB boards, using special materials and technologies, will make the plastering reliable and durable, will not only avoid cracking, but will also give it an aesthetic and modern look.

Preliminary steps and required materials

Lay walls with fiberglass mesh

It is considered ideal for specialists to apply several textures in layers, which will give the decorative and protective coating the required reliability and durability.

The pleasure is not cheap, but for those who build their own house for more than one year, it is better to invest at a time, and get a guaranteed result, than to repair it annually, wondering why the plaster is cracked.

The preliminary preparation, undertaken before plastering the OSB slab on the facade of the building, is carried out after rigidly fixing the slab structure and checking them for stability and absence of vibration.

Before plastering, the work is performed in a specific sequence and alternately superimposed:

The bottom layer is sheathing sheets (lined kraft paper, bituminized cardboard, or paper-based roofing felt).
Reinforcing base (fiberglass, or galvanized mesh).
Glue fill, which completely floods the layers, making the mesh immersed in it.
Primer.

There are also alternative methods, for example, a commercially available composition that is applied to the external, facade perimeter or used for interior decoration.

Unlike long-term and requiring professional skills, traditional preparation, OSB plaster is applied as a thin layer of a special composition, which makes life much easier and minimizes the required scope of work. It is as easy to apply as it is to putty.

However, here one cannot do without preliminary preparatory work. Before applying a special layer, it is necessary to sand the chipboard to full smoothness with sandpaper, apply a primer and only then cover with a polymer composition.

An alternative way of decorating a building does not exclude the use of traditional design elements. If you apply acrylic plaster on a cement base, the decorative coating will last for more than a dozen years.

Realized opportunities and additional chances

After examining the options that the modern construction industry offers, the disputes over whether it is possible to plaster OSB slabs seem redundant and empty. A zealous owner will always take care of a longer service life and take additional measures to strengthen his own home.

Plastered facade will last longer

A plastered house will last longer and look much more presentable. The choice of a suitable material to decorate a house from the outside often depends not on the quality and reliability of the coating, but on the state of the budget allocated for the construction.

It is quite clear that a house from OSB boards is being built in order to optimize the cost of building materials, otherwise it would be possible to purchase moisture-resistant OSB.

Of the existing types of protective coatings, you can stop at the most time-consuming, traditional method, which gives long-term guarantees, through the use of industrial compounds:

polymer-based OSB plaster (polymer, with a high degree of adhesion to wood, resisting strong deformation);
oil and glue, suitable for finishing and having a pungent chemical odor;
finishing with polyurethane foam sheets followed by plastering with gypsum, cement or lime mixture;
a traditional laborious method that allows you to insulate the facade and subsequently save on heating a very decent amount.

Indoor OSB plaster requires much less reason to think about it, because it is not exposed to atmospheric conditions.

But here, too, one should take into account the quality of ventilation, the method of heating and the external insulation of the house.

Polymer mixtures with vapor permeability allow, when applied to OSB, to avoid mold contamination and fungus in the house, which certainly occurs if the walls do not breathe.

Process and methods: possible and desirable

Protect the OSB with a layer of waterproofing

OSB boards are not only possible, but also desirable to be plastered. This will extend the life of the house and increase the rigidity of the structure. No matter how waterproof the purchased slab is, wood is still susceptible to moisture.

A layer of plaster will undoubtedly prevent walls from collapsing, but only if there is a waterproofing layer between the wood board and the protective coating. For detailed instructions on puttying and plastering OSB, see this video:

Roofing material, kraft paper, bitumen cardboard, polymer elastic coatings - the choice of material for waterproofing is carried out taking into account personal preferences, time and budget.

Kraft paper

How to plaster the external facade so that it lasts longer, each owner decides individually. If a mounting mesh is used, it must be securely fixed, otherwise the structure will not be stable. Plaster is applied in layers, then sanded, painted over with facade paint.

For interior decoration, you can apply a decorative coating, which is applied even to the glued foam layer.

When choosing a method, one should take into account not only economy, but also practicality and aesthetic component. To insulate the house, you have to tinker, but this will make it possible to save on heating.

With the help of decorative plaster, the house can be given any color and any texture of the walls. You can make it indistinguishable from stone-faced or brick-built, tinted in the brightest shade. Such a structure will be truly original and unique. If you wish, you can also glue the wallpaper on the OSB plate.

Detailed information on each type of waterproofing layer should be carefully studied. It is advisable to consult with specialists. Sometimes savings on building materials today translate into significant expenses in a short time.

Source: http://MoyaStena.ru/shtukaturka/mozhno-li-shtukaturit-osb-plity

The expediency of plastering on osb slabs

Is it possible to plaster osb (osb) boards? This question is often asked by the owners of housing built using frame technology. Such buildings, like those built from any other materials, need insulation and decorative finishing. Plastering is a great way to address these issues.

Pre-plastering activities

It is not recommended to apply plaster directly to the surface of the slab. This is due to the ability of plaster mixes to absorb moisture from the air and transfer it to the base. As a result, the panel will be constantly exposed to water and its life will be shortened.

In order to avoid direct contact of osb panels with plaster, it is necessary to carry out mandatory measures that will not only protect the surface of the walls from excessive moisture, but also allow the solution not to crack during operation.

It will be possible to plaster osb (osb) panels if they are previously prepared in several stages:

Fasten sheathing sheets made of bituminous cardboard, lining kraft paper or roofing material on a paper base;
Install galvanized steel or fiberglass reinforcement mesh;
Fill the resulting structure with special glue, ensuring that the mesh is completely immersed in it;
Treat the resulting base with a primer.

All work on the preparation of the panels can be carried out only after rigidly attaching them to each other and to the ceilings in order to exclude vibration during the finishing work and further operation of the house.

After completing the necessary steps, you can start plastering work. It is better to give preference to vapor-permeable compositions on a mineral or silicate basis. Unlike conventional cement mixtures, they have pronounced decorative properties due to additives that are included in their structure at the production stage.

Alternative ways

The procedure for applying traditional mixtures to OSB boards is rather cumbersome and requires a professional approach. Ready-made compositions have appeared on the modern market, which are applied to the base in a thin layer. The process is rather similar to puttying, as it covers the walls with a layer of 1.5 to 5 mm. They are suitable for outdoor and indoor use.

For finishing osb panels, polymer-based compounds are used, which have high adhesion. Polymer-bonded plasters are available in different types. For wooden surfaces, an option based on synthetic resins is suitable: acrylic or latex. After drying, it forms a vapor-permeable, durable surface that is resistant to moisture.

The application of polymer finishes has its own nuances and requires preparatory work:

the surface of the plates is cleaned with sandpaper;
a primer is applied;
ready-made mixtures are applied.

The polymer composition can also be applied on a leveled cement plaster base. The cost of such finishing is much higher than traditional compositions, but it is compensated by a long service life, up to 25 years, during which the excellent appearance of polymer plaster remains.

What gives osb panels plastering (osb)

The facade is insulated with mineral wool or expanded polystyrene. The insulation is attached directly to the surface of the OSB panels. Then the actions are carried out according to the already familiar scheme: the installation of a reinforcing mesh, an adhesive composition, a primer and a plaster composition.

The plaster remarkably protects the insulation from mechanical damage and the effects of the external environment:

atmospheric precipitation:
sunlight;
wind loads.

Vapor-permeable plaster mixes allow the house to breathe, do not accumulate condensation on the surface of OSB panels. As a result, the walls are reliably protected from the appearance of mold and mildew.

The combination of plaster and insulation in the decoration of the facade can significantly improve the quality characteristics of the structure:

reduce the cost of heating the building by more than 50%, thanks to good thermal insulation;
to increase the sound insulation characteristics of the house by 2 times.

It remains only to choose the type of plaster mixture. Each squad has its own strengths and weaknesses. The decision in favor of the use of one type or another is made on an individual basis.

Plastering of osb (osb) boards is quite possible. In addition to insulating the building, it helps in decorating the exterior through the use of decorative plasters or paints. Mineral-based mixtures are well suited for further coloring.

Silicate-based plaster is used not only for facades, but also for interior work. With polymer-based mixtures, you can also solve interior design issues.

Source: https://baoyuan-osb.ru/article/shtukaturit-osb-plity

OSB plaster

OSB boards are used in construction both inside and outside the building. However, some problems arise when plastering wood boards. Difficulties include cracking and moisture absorption. To prevent these negative manifestations, you need to prepare the wooden surface well. Find out how best to do this in our article.

To protect a relatively inexpensive material from atmospheric agents, plastering is recommended for OSB. In practice, however, this is not so easy as it is necessary to ensure sufficient adhesion, reduced moisture absorption and no cracking. But with the right advice, good plastering is possible in both the external and internal parts of the building.

OSB painting
Coating with OSB varnish

Difficulties when plastering OSB boards

OSB panels are used with pleasure indoors for interior decoration. However, since they are made of wood, they absorb moisture well.

Apply the plaster directly to the board, the plaster becomes dry and falls off over time, changes in the air humidity in the room also lead to cracking, as the boards react to this. One of the ways to eliminate this negative property is to use gypsum plasterboards indoors.

They protect the surface of the osb and create an additional layer that can be easily plastered. For the joints, in this case, fiberglass tape is used, the seams of the gypsum plasterboards are sealed with soil, and after drying, the surface is ready for plastering.

Plastering OSB outside

If you installed OSB panels from the outside, then they can be revetted with sheets of polystyrene, then reinforced with fabric, and plaster at the end. In the open air there is a risk of moisture ingress, even with good plaster - heavy rain, snow, temperature fluctuations pose a risk for OSB sheets.

Direct plaster on OSB panels
Although it is better not to plaster it from the outside to preserve the OSB slab, treat it with other means. But if such needs arise, it is possible to do this. To do this, treat the surface with a special acrylic primer. Make sure it completely covers the surface and there are no transparent or translucent spots. This is the only way to ensure the protection of OSB sheets from moisture. Let the surface dry and apply a reinforcing cloth. This should keep the plaster from cracking.

Next, you need to apply a thin layer of tile adhesive - it should be so thin that the mesh of the reinforcing fabric is visible. Excess tile adhesive is removed. Glue for tiles, here it performs two tasks - it serves, firstly, as adhesion, and secondly, it is an additional layer that retains moisture from the outside. After this procedure, allow sufficient time for the surface to dry completely.

Advice: When working outdoors, make sure that the panels are given sufficient time to dry. Therefore, pay attention to the weather forecast and choose the driest day when carrying out work.

Preparing the OSB board for plastering (both inside and outside the house)

Plaster cannot stick to smooth OSB sheets. Due to the fact that this material is supplied without protective treatment against moisture, it swells quickly and is thereby damaged. In order to fix this, mechanical adhesion mediators are needed. Alternatively, you can use adhesive paint. For example, galvanized iron mesh is suitable. It must have sufficient strength and be well anchored.

Preparation of the base

If you want to apply a thin layer of plaster (light plaster up to 1 cm thick), use an acrylic-based adhesive primer to prepare the substrate. It is effective against moisture. Then fix the reinforcing mesh on the base, go through with a thin layer of tile adhesive.

Tip: Press well on the mesh so that it does not slip and is well anchored. Allow the prepared substrate to dry thoroughly before proceeding.

Now the surface needs to be primed - a primer for concrete mortars is suitable for this. If you want to plaster with a clay building material, then the trade offers special primers that are also suitable for OSB boards.

Plaster on OSB sheet

Now that the surface is prepared, you can easily plaster it. It is advisable to walk in two layers, while allowing each layer to dry well. If you are using clay plasters, you can apply with paint brushes. OSB plastering is not a complicated process, so everything is done quite easily.

Making a solution for plaster
You have the choice whether you want to buy a ready-made mixture or make a solution yourself by mixing the right ingredients.

It contains the following components:

Sand
Cement
Slaked lime

The properties and behavior of the mortar depend on the mixture selected. Thus, by changing the ratio between the individual components, you can change its properties. For example, a high limescale content increases the strength and adhesion of the mortar. Remember to mix equal parts water, cement and sand to get a good result.

Fine sand is suitable for interior work, as the plaster layer becomes smoother. Alternatively, you can use a ready-made mixture. Pay attention to the information on the packaging, here you will learn about the scope of the selected product.

Advice: since in many mixtures the content of calcined Substance remains insignificant, a little lime can be mixed if necessary. This is necessary if you want a more durable plaster.

Typically, a plastic bucket is sufficient for mixing the mortar. The finishing mixtures are now mixed with water, resulting in a plaster. To mix, place the mixture in a bucket and add and add water in the amount indicated on the package. For mixing, you can use a drill with an appropriate attachment. After mixing, the solution should be left for 10 minutes.

These tools and materials are required for Plastering:

Flat trowel
Plaster trowel
Level
Rail
Putty knife
Plastic containers
Drill
Drill attachment
Ready mix, or, respectively, cement, hydrated lime and sand

Plastering Instruction

1. First, using a spatula, spread the mortar evenly over the wall. The consistency of the material is important for the speed of work and other work processes. The mixture should not be too wet or too dry. Thanks to the optimal mixing ratio, you get enough time to ensure an even layer of plaster.

2. In addition, a plastering rail is required for plastering work. It should be long enough and can be made of wood or metal. It serves to distribute the plaster evenly over the wall surface. Pull the batten from one side to the other to smooth the surface.

3. After that, you should pay attention to the empty spaces, depressions. Add the solution there and walk again with the rail - so that the surface becomes even.

4. These operations should be carried out until a smooth surface is obtained and the plaster is of sufficient thickness.

5. Use a water level to check for uniformity. If you find small irregularities, then you will have to work on them until the surface is perfectly flat.

6. Then use a wide trowel and slide it over the wall. He will remove the excess of the mortar, and even small irregularities will disappear on the wall.

7. Let the solution dry before proceeding.

8. After the solution is dry, you can correct minor irregularities - the task will be much easier.

9. After completing the work, the plaster should dry within a few days.

10. If you plan to paint the plaster, you must first apply the plaster mix. And when finishing, do not use a float - the surface must remain smooth.

Features of plastering OSB boards

The edges and places of the seam are an important point when plastering OSB boards. There are special seam tapes commercially available that can be used for edges. Self-adhesive versions are especially easy to handle. To prevent cracks from forming in the joints, versions with artificial fibers can also be used as plaster. The additives provide the most flexible shape and the material is easy to stretch. This reduces pressure and the risk of cracking.

Pre-plastering activities

It will be possible to plaster osb (osb) panels if they are previously prepared in several stages:

Fasten sheathing sheets made of bituminous cardboard, lining kraft paper or roofing material on a paper base;
Install galvanized steel or fiberglass reinforcement mesh;
Fill the resulting structure with special glue, ensuring that the mesh is completely immersed in it;
Treat the resulting base with a primer.

The application of polymer finishes has its own nuances and requires preparatory work:

the surface of the plates is cleaned with sandpaper;
a primer is applied;
ready-made mixtures are applied.

The plaster remarkably protects the insulation from mechanical damage and the effects of the external environment:

atmospheric precipitation:
sunlight;
wind loads.

The combination of plaster and insulation in the decoration of the facade can significantly improve the quality characteristics of the structure:

reduce the cost of heating the building by more than 50%, thanks to good thermal insulation;
to increase the sound insulation characteristics of the house by 2 times.

It remains only to choose the type of plaster mixture. Each squad has its own strengths and weaknesses. The decision in favor of the use of one type or another is made on an individual basis.

Silicate-based plaster is used not only for facades, but also for interior work. With polymer-based mixtures, you can also solve interior design issues.

When working with OSB boards, you must first of all remember that more than 90% of these products consist of wood. Therefore, high-quality finishing of OSB boards is associated with the use of materials typical for working with solid wood surfaces.
Plates lend themselves to almost any finish: they can be glued, painted, putty, varnished and even, subject to certain rules, plaster. All processing methods have their own characteristics, so each should be disassembled separately.

Painting the slab

A material such as OSB can be painted with water-based or oil compositions applied with a brush, spray gun or roller.

The question often arises, is it possible to paint the OSB slab with water-based compositions? It is possible, but at the same time the shape of the leaf will slightly increase (swelling is possible), therefore it is highly desirable to use it. Painting on one side only may cause the panel to bend slightly. Therefore, it is worth treating the board with water-based paints in the case when the appearance is not important. In opposite situations, it is necessary to use oil formulations. What are the features?

1. Any paint tends to spread at sharp corners... Therefore, before painting, they must be rounded off by light grinding (with a radius of at least 3 mm). This is especially important for OSB used for outdoor decoration.

When treating outdoor boards, use paints intended for outdoor use. In this case, the manufacturer's recommendations for painting wooden surfaces should be observed.

2. Edges. Their surface is more porous than the plane of the slab. The result is greater absorption, i.e. moisture absorption. Therefore, special attention should be paid to edge sealing. Moreover, this operation must be carried out before priming and applying the base coat.

3. Padding... If you decide to treat the slabs with an antiseptic, fire retardant impregnations, then you should carefully read the instructions - some of these chemicals may contain an increased alkali content, which will require the use of a special primer.

4. Layers of paint... The opinion that the thicker the layer, the better it will protect the surface, is not entirely true. It is better to apply several thin coats than one thick one. In this case, each layer must be thoroughly dried.

the edges must be processed before the assembly of the structure (rounded and sealed);
if water-based sealing compounds are used, then in the future, due to swelling, compulsory grinding will be required. Therefore, it is better to use solvent-based formulations (for initial processing);
when using transparent dyes, it is necessary to use those that prevent the penetration of ultraviolet rays (i.e., inhibitors must be present in the composition of such materials);
the boards must be fixed in such a way that potential areas of moisture accumulation cannot arise;
it is necessary to cover both sides with dye equally;
45 degree end connection is not recommended (due to sharp edges). If the finish provides that the edges will be visible after completion of the work, then they must be filled with cellulose (wood) aggregate, and then sanded and primed.

Putty and varnishing

The design of the OSB board itself, its texture are decorative and look attractive in aesthetic terms. The use of a colorless putty or varnish will only emphasize the naturalness of the surface. But do not forget about the "tendency" of the material to swell.

So is it possible to putty OSB? It is possible if oil-based formulations are used. A good effect is given by the use of a putty when applied to a floor covering made of slabs. The surface is glossy and sufficiently protected from mechanical stress.

Any special OSB putty or varnish does not exist. The usual compound used for wood surfaces will work. If it is necessary to use them, it is better to use special plates that have already been sanded by the manufacturer - such panels do not need preliminary preparation. Sanded boards can also be used for film coating or lamination.

If you are using drywall for home decoration, we advise you to read the article about.

Pasting wallpaper on OSB

The traditional approach is no longer suitable here. The board is highly absorbent. Therefore, you cannot just stick the wallpaper using glue containing water in its composition - the plate will begin to swell, the wallpaper will simply fall off.

In order for the wallpaper to stay securely on the OSB surface, a number of preparatory measures must be taken.

First, a layer of primer must be applied to the panel. After its complete (complete!) Drying, any dispersion putty based on synthetic resin is applied. Drying time should not be less than 12 hours.

And the final preparatory step is gluing an elastic material for reinforcement. Only compliance with the above rules will allow the pasted wallpaper to stay on the OSB surface.

Plastering OSB boards

Very often, OSB slabs are in demand during construction - they are used to upholster the supporting frame. One of the ways to protect it in this case is plastering. However, here again the problem of absorption arises, and the question "is it possible to plaster osb" is quite pertinent.

The process of plastering slabs has its own characteristics. These include, first of all, the preliminary fastening to the surface of the bituminized cardboard. It is also possible to use roofing material with a paper base or facing kraft paper.

The next step is to fix the galvanized plaster mesh. The resulting structure is poured with a special adhesive (the lattice should be completely immersed in it). Any special plaster on the OSB board is not required. The only requirement is that it must be vapor-permeable and polymer-acrylic.

Gluing elements on OSB

If necessary, various decorative elements can be glued to the OSB board for interior decoration. For outdoor use, bonding may be necessary, for example on a roof. Usually, several types of glue are used, depending on the place of application and the required strength of the joints:

thermoplastics: for work in dry conditions (the objects to be glued must be fixed);
thermal hardening compositions: serve as structural, i.e. load bearing, glue (harden when heated, but there are compounds that harden at room temperature);
urea-formaldehyde, melamine-formaldehyde: have limited resistance to weathering. It is better to use in a place protected from precipitation or indoors;
elastomers: they include 2 components (binder, glue itself), used for gluing thick parts (quickly sets, no pre-fixing is required);
on a bituminous basis: more often used for fixations when arranging a roof.

Oriented strand boards (OSB, OSB or OSB), invented in Canada in the era of mass construction of frame residential buildings, are also interested in Russia. Lightweight, sufficiently strong slabs are used both for facing facades and for interior decoration. It is quite understandable that they try to ennoble the nondescript surface of the glued chips with decorative materials. One of the popular ways to achieve this is to use a protective plaster over the OSB slab on the facade of your house.

Is it possible to plaster osb

Having conceived to veneer the facade of their house with OSB or use particle boards indoors, homeowners carefully consider options for their finishing. In this case, the question of whether it is possible to plaster an OSB slab arises first in most cases. After all, if we neglect decorativeness and leave OSB without an external coating (especially on the facade), then even wood covered with water-repellent compounds will absorb moisture.

This water is enough to swell the stove in summer and defrost it 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 need to be protected from temperatures above + 30 ° C. Therefore, since the beginning of the production of slabs, builders have thought about a protective coating for them.

The following types of finishes are most often used:

painting (the cheapest and easiest option);
wallpapering (suitable only indoors);
cladding with decorative panels attached directly to the plates (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 the plates, requires additional measures for vapor barrier OSB);
facing with tiles (suitable for rooms, but "blocks oxygen" to the wood);
facing slabs with decorative stone coating (the most expensive and time-consuming method);
plastering.

Types of OSB board finishes

Properties that a protective coating for OSB should have:

waterproof and waterproof;
sufficient mechanical strength;
temperature stability (withstand sudden jumps);
vapor permeability;
environmental friendliness;
fire safety;
long operational life;
maintainability;
unattractiveness to mold, mildew and rodents;
resistance to solar radiation;
light weight;
affordable price;
simple operation at no extra cost;
the ability to do it yourself.

Why do osb panels need to be plastered

Plaster has all of the above properties.

Plastering also:

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

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

Correctly plastering chip boards once, they forget about repairs for a long time. And if the appearance is boring, it can be easily changed by painting in new colors. Such a coating is easy to clean, reliably, and does not allow drafts.

What plaster is used for OSB boards

If the plaster is the finishing touch of the "puff pie" - the composite OSB coating, then, as a rule, there are no particularly difficult problems with the choice of the plaster composition. Therefore, speaking about plasters, we will touch on conventional compositions based on various binders. In addition, there are compositions specially designed for plastering OSB.

Layer cake scheme

The use of foam for insulating wooden structures is possible but not desirable!

Plaster mixes are divided into types:

leveling (rough);
decorative (finishing);
special (waterproofing, etc.)

Plaster mixes are divided according to the field of application into:

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

All formulations have a basis: binders, filler (natural or artificial particles that make up most of the volume), certain functional additives.

Mineral

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

Binder components are polymers.

Basics are of two types:

water-soluble;
soluble with organic diluents.

Composition prices are higher than prices for mineral mixtures.

Decorative

Specially formulated mixtures for decorative work.

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

pebble (and plaster);
flock;
colored;

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

Methods for plastering OSB boards

When applying a 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 addressed in various ways. There are two main ways to plaster OSB:

without insulation;
with insulation.

In both cases, OSB boards must be rigidly fixed to the wall in order to exclude significant movements during work and during shrinkage.

The traditional way

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

For plastering you will need:

membrane vapor permeable material such as Tyvek StuccoWap;
broaching mesh for reinforcement;
adhesive composition;
plaster mix.

Sequence of work:

A membrane panel is attached to the OSB surface with a stapler. The canvases are overlapped (10 cm) using glue or double-sided tape.
Apply a reinforcing mesh over the top, attaching it to the OSB.
A layer of adhesive is applied (to completely immerse the mesh in the composition, two layers must be applied).
A primer is applied to the dried adhesive to increase adhesion (preferably deep penetration).
Plaster the dried surface.

Scheme of the standard method of plastering according to osb

For this method, it is especially important to use an elastic plaster composition from a trusted manufacturer, otherwise the plaster layer will crack from the "movements" of the wood surface. Most often, cracks occur at the joints of the OSB. Roofing material, kraft paper or bitumen cardboard can be used instead of the membrane.

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

puttying OSB under plaster

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

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

Warming and plastering

Insulation is usually carried out outside the building. For example, in order to plaster OSB slabs, a sheet with a thickness of 40 mm is taken as a heater.

Subsequence:

Insulation sheets are glued to the prepared OSB surface. After the glue dries, the sheets are fixed with mushroom dowels, embedding the caps in the foam. The joints between the foam sheets are foamed, the foam that has protruded above the surface is cut off.
Apply an adhesive composition with a layer of 3 mm, apply a mesh, straighten it, smooth it with a wide spatula, immersing the mesh fabric in the solution. The solution protruding on top of the mesh is leveled.
After the adhesive solution has dried, the prepared plaster mixture is applied.

Installation of foam plastic Fixation of dowels with fungi Foaming of foam joints
Fastening of the reinforcing mesh Application of plaster mixture

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

Using drywall

Plasterboard sheets (gypsum plasterboard) are classified as dry plasters. The tandem drywall + OS board does not ignite and is able to significantly reduce noise than a separate OSB. You can fix drywall to OSB indoors directly (without a guide frame). In this case, the OSB is fixed with self-tapping screws on the guides. GKL with self-tapping screws through OSB are attached to the same guides.

But the joints of OSB and GKL should not coincide. Drywall can even be glued to the OSB, and then fixed with self-tapping screws. GK sheets are well putty and plaster. Almost all types of plaster mixes are suitable for plastering. It is not required to attach vapor barrier under the gypsum board in dry rooms.

Features of plastering indoors and on the facade of the building

In addition, the used plastering materials and plastering of OSB boards, performed indoors, differs from plastering outdoors in working conditions. During the plastering facade work, choose a few days of dry, calm, 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.

Indoors, conditions are more comfortable. Humidity is of great importance here (no more than 65%), the absence of drafts. It is impossible to use fans and heaters to speed up the drying process of plaster solutions. Violation of the conditions will lead to 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;
a grater for grinding (with sandpaper);
level;
containers;
short hair roller;
mixer;
brush;
masking tape;
rags.

Osb surface preparation

OS boards can be dusty and dirty. It is necessary to grind the surface, remove dust, dirt spots. Since it is impossible to wash wood material, special agents based on organic solvents, for example, white spirit, are used for cleaning. The seams are sealed (the sealant for OSB is taken elastic, since the plate must have an expansion gap on the sides), primed and putty to obtain a flat surface.

Sealing joints between boards with a sealant

Step-by-step plastering technology

Plaster on the OSB slab on the facade in sequence:

After installing the particle boards, inspect the wall surface.
They clean the surface from dirt and stains.
The protrusions are ground. They pass over the panels with a vacuum cleaner, removing dust.
The joints are coated with an elastic sealant composition.
The seams are putty and level. The wall is dried.
Apply a primer with a brush or roller. Dried.
Apply a vapor barrier material (roofing material, membrane cloth, etc.). Fix with a stapler.
A 3 mm layer of adhesive is applied to the surface with a spatula (for example, Ceresit CT85).
Apply a reinforcing mesh, straighten the canvas, press it with a spatula into the adhesive solution. Make sure that there is a layer of glue between the mesh and the base. The mesh should not "whiten" over the adhesive. If necessary, grease on top with a solution.
A day later, a millimeter layer of the glue mixture is applied over the mesh (for leveling). Dried.
They are primed with the composition of the same manufacturer (for example, ceresite CT16). Dry the primer.
Start finishing plastering work. A plaster solution is applied (from the line of decorative compositions of the same manufacturer), the surface is formed in the way that is chosen to create the desired effect.
The dried finish is painted or varnished.

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

OSB plaster 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.

With the massive use of oriented strand board in residential construction (), the question arose whether it was possible to plaster OSB slabs. The resin bonded wood base is not suitable for conventional cement, lime or gypsum mixes.

Polymer-based smallpox plaster

With the advent of polymer-based plastering compounds with high adhesion to wood, the problem of how to plaster OSB outside has lost its relevance. The elastic mixture effortlessly lays on the base of the slab in a thin layer, tightening up minor irregularities. A semblance of a rubber sheath is formed that is resistant to mechanical and weathering.

Suitable for indoor and outdoor decoration. Tinted with acrylic dyes. Technical requirements are standardized:

withstands 10% linear tension (compression) per square meter of coverage;
water permeability 1 sq.m. no more than 8 grams per hour;
operating temperature range from -50 ° C to + 60 ° C;
150 freezing cycles without quality loss;
preservation of properties for at least 25 years;
24 hours for the applied composition to dry;
consumption 2 - 2.5 kg of mixture per 1 sq.m.

Plastering on osb with elastic filler is carried out in the following sequence:

the plate is cleaned with coarse sandpaper. This removes protruding wood fibers that have a weak connection with the base;
to increase adhesion, the cleaned surface is primed with a suitable agent;
after the soil has dried, the irregularities are filled with acrylic sealant and smoothed with a spatula soaked in soapy water. This will keep the instrument from sticking to the composition;
the composition is applied to the prepared surface and leveled to obtain a layer up to 5 mm thick. Plastering on the OSB slab on the facade is applied to the maximum thickness, isolating the room from cold and moisture leaks. For decorative finishing of interior walls, 1.5 - 2 mm is enough.

From osb it is especially practical with the use of decorative polymer compounds:

bright colors will decorate any facade;
color for the entire thickness of the layer will hide the damage to the surface;
the building will receive additional external protection.

The high cost of composite compounds forces the developer to look for alternative options. Outside plastering of OSB boards is possible with the use of oil-glue mixtures and nitro-fillers.

Alternative to elastic plaster

The most widespread is oil-glue putty. Supplied ready-made or concentrated. Derivative mixtures:

drying oil or oil paint - a binder component of the composition;
KMTs glue forms a strong connection of the plaster with the osb board;
chalk as a mineral filler;
driers to accelerate drying of drying oil;
plasticizers soften the composition, facilitate the application and leveling of the putty;
water is added in small amounts to prevent the mixture from drying out during storage.

Nitro putty is applied in a thin layer. Used for minor damage or decorative purposes. They have a pungent odor. Work is carried out in well-ventilated areas. Solvents are used as a basis. Fillers: iron red lead, koalin, zinc white. Surface finishing is required: painting or wallpapering.

There is another way of applying plaster to the surface of an oriented strand board: thin sheets of polyurethane foam are glued to the surface and plastered with mixtures on a cement, lime or gypsum base.

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