How to putty OSB, whether it is possible to plaster - tips for choosing materials and work. How and how to plaster, paint and putty osb boards Plastering osb boards

OSB boards are widely used in frame house building. Those located on the street require protection from external atmospheric influences. Inside living quarters, the surface is finished in various ways: they paste wallpaper, paint, varnish. When using some options, OSB must be puttied to create a perfectly even base, to protect wood from the harmful effects of the applied means, 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 needs additional decoration. Puttying is not only the basis for subsequent decoration, but also protection from the harmful effects of the environment. The peculiarity of the material, like any other natural wood, is its susceptibility to water and its fumes.

For this reason, many people think that it is not necessary to putty the OSB plate, since the water contained in the mixture will cause the base to swell and deform. Wallpapering, painting is also dangerous. All is true, if one is not taken into account: there is a sufficient number of modern mixtures, adhesives, paints that do not contain water. They should be used.

Decorative putty hides the structure of the plate

The natural appearance of the plates in some cases may well suit, if it relates to utility rooms, farm buildings. Someone likes a peculiar pattern of the surface, the plate is varnished - and the whole finish. To make OSB look like capital walls, you can not do without preparation. It is putty that will create a perfectly even base for wallpaper, painting and decorative plaster. Wood does not swell from paint or glue.

  What should be the primer?

There are no specially designed formulations for OSB. Conventional solutions are used taking into account some requirements. Immediately exclude preparations containing water. After application, it is absorbed into the material, it begins to swell. Use only a primer designed for wooden surfaces. These are compositions with an acrylic, glyphthalic or gypsum base. Take into account the moment 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, it is used for painting and puttying. For unheated rooms add additives that prevent the development of the fungus. Some formulations, such as EuroPrimer, already contain such additives. It is sold in concentrated form, before use it is bred according to the instructions.

The plates contain resins and other substances that sometimes come out through the finish and spoil the work done. To eliminate such a nuisance, a rather sophisticated technology is used. First, an insulating coating is applied (example: Aqua-Deck E. L. F.), then a dispersion filler containing a synthetic resin. Allow to dry for 12 hours and paste on a special material for fastening cracks in the putty: Variovlies A 50 Basic. After such preparation, no spots will appear.

In some cases, adhesive primer is used - Concrete Contact. It differs from other compositions in the content of quartz sand, which makes the surface non-smooth, and with small irregularities. It is used when decorative plaster or tile is planned as a finish. Due to the unusual filler, adhesion is significantly improved. By applying with a mock brush or long-nosed roller, other tools do not provide an even distribution of the composition on the plate.

Before use, it is recommended that all soils be mixed, 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 every 10 minutes, repeat this procedure, only under such conditions the coating will be of high quality.

Among other primers, professionals recommend:

• acrylic-based varnish for wooden surfaces, which is diluted with a 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 the correct choice of primer, it is important to apply it according to the technology:

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

The quality of the primer depends on the patience of the master. Do not immediately apply a thick layer, the effect of this will not be. It is recommended to repeat the operation three times, carefully distributing the drug on the surface.  Each time give a good dry. How much time will pass depends on the air temperature and the properties of the composition and thickness of the layer. Have to be patient, do something else, but the quality will be excellent.

  Putty requirements and selection

1. 1. Acrylic. Levels any surfaces, including OSB.
2. 2. Nitro putty. Quick-drying composition containing cellulose, resin, plasticizers, fillers. Before use, dilute with solvents recommended by the manufacturer.
3. 3. Oil-glue - as a part of varnishes, glue, additives, oil and plasticizers Dissolve with drying oil.
4. 4. Plaster with polymers. They are considered the best for work with wooden surfaces.
5. 5. Dispersion with synthetic resin. Highly elastic, used for finishing plaster.

The listed types of putties should have certain properties. Before buying, it is recommended that you read the instructions on the packaging and pay attention to the specifications. Among these, a very high degree of adhesion is of particular importance, because not every composition adheres to the resinous surface. In preparation for use, it is important to achieve a uniform consistency. Coating requirements include strength and resilience to sanding.

If it is necessary to putty a small area, then the cost of the compositions are not particularly sensitive. When finishing the whole house, built on frame technology, it hits the budget. There is a recipe for self-made composition, which is used by some masters.   It consists of inexpensive components:

• oils: 2.8 kg of flaxseed 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. The pumice is crushed into dust, the mass is poured into linseed oil and stirred until a homogeneous consistency. Pour in the turpentine oil and mix again. When the mixture is infused for 10 minutes, add the rest. Heated in a water bath, stirred, insisted, repeated again until they achieve uniformity.

  Putty Technology - Process Sequence

The work is not particularly difficult and repeats all the operations applied to other surfaces. One theory to cope with the finishing of capricious material is not enough. For those who have little experience of 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 in order to avoid mistakes and not to miss something. Start with sanding the surface, joints and ends with fine-grained sandpaper. They remove dust and must be primed. After processing the compounds, a protective film is created that prevents the entry of resins and other substances into the reaction with the finishing material.

Sealing joints at the beginning of work

After drying of the last, third layer, they begin to putty. The work is performed at a temperature of + 1 ° C and more and relatively dry air, in which dampness is not felt. The composition is applied to the tray, put with a spatula on the plate. After processing a small area, level the coating, remove excess. This is done until the putty is seized.

A tool of different widths is used. With a narrow spatula, the composition is distributed in large. Holding it at an angle to the surface, evenly smooth the mixture. 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 an extra waste of material, but also the threat of cracking. Putty is allowed to dry for 3-12 hours, depending on humidity and temperature.

Then the surface is ground, eliminating bumps. If there are noticeable depressions, correct by applying the composition, repeat the previous operations. When they achieve an acceptable result, they paint or wallpaper. Sometimes non-woven reinforcement is required. Separate pieces are lapped, then the joints are cut, excess is removed.

  OSB plastering - how to do it right

A similar operation is used mainly outside to protect the plates from mechanical damage, sun, rain and wind. The vapor-tight plaster allows the material to breathe, condensation does not accumulate, there are no favorable conditions for the development of mold. Often walls are simultaneously insulated, which significantly reduces heating costs, improves sound insulation.

Different solutions are used:

• universal cement-sand, which is suitable for all surfaces;
• polymer compositions characterized by high bonding characteristics;
• gypsum for interior decoration;
• limy to plaster wet rooms.

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

OSB plastering is carried out on a reinforced mesh

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

The technology is standard, but there are some features. A spatula is used, and the subsequent layer is applied after the previous one has hardened. The use of special mixtures will facilitate the process, because it is difficult to work with cooked ones yourself, especially without sufficient experience.

A detailed look at the features of OSB plastering will help the video material.

In building a house, one often has to think about saving money, or preserving construction for a certain period. One of such ways of saving or taking a break for accumulating funds may be plastering the facades of the frame house.

Plastering the facades of wooden houses with us was widespread after the fire of 1812, and was often used until the beginning of the 20th century. Then this method of decorating the facades was almost 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 the stucco mixture to the facade of the house. The first, the most common, is that the external walls of the house are glued over, with sheets of polystyrene foam and a plaster mixture is already applied to them. At the same time, the thermal insulation and energy-saving characteristics of the house are improved.

Step 1. We pass all the joints of the OSB sheets with frost-resistant sealant, over the seams we impose a self-adhesive "sickle", and putty.

Step 2. Ground 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. We put a thin first layer on the pre-primed sheets of the outer casing, on top we spread the fiberglass mesh, slightly recessed it in the first layer (in addition, the mesh can be “shot” with a construction stapler). Then we impose the second layer of plaster mix.

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

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 boards without spending additional materials and efforts.

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

Expensive building materials can be successfully replaced with OSB wood boards. The practice of using them for exterior walls is widespread.

The popularity of the use of OSB plates

OSB slabs for exterior decoration of the facade and residential premises are a great alternative, affordable and affordable. Any type of construction and each building material have positive and negative sides.

Lightness and heat-insulating properties of plates made of layers of wood chips are an indisputable advantage, but, according to builders, such walls require additional decorative decoration.

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

OSB boards are used in construction both inside and outside the building. However, when applying plaster to wood boards, there are some problems. 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 from our article.

To protect the relatively inexpensive material from atmospheric phenomena, OSB is recommended to apply plaster. However, in practice this is not so simple, since it is necessary to ensure sufficient adhesion, reduced moisture absorption and the absence of cracks. But with the right advice, good stucco is possible in both the exterior and interior of the building.

OSB panels are a pleasure to use indoors for interior decoration. However, since they are made of wood, they absorb moisture well.

Apply the plaster directly to the slab, the plaster becomes dry and falls off over time, changes in humidity in the room also lead to cracks, as the slabs respond to this. One of the ways to eliminate this negative property is to use drywall boards indoors. They protect the surface of the OSB and create an additional layer that can be easily plastered. For joints in this case, fiberglass tape is used, the seams of drywall boards are sealed with soil, and after drying, the surface is ready for plastering. We recommend reading on our site how to install OSB - several methods are described.

If you installed OSB panels outside, then they can be lined with foam sheets, then apply a reinforcing fabric, and finally plaster. In the open air there is a risk of moisture, even with good plastering - heavy rain, snow, temperature fluctuations pose a risk to OSB sheets.

Direct plastering on OSB panels
  Although it is better not to plaster it outside to preserve the OSB plate, treat it with other means. But if such needs arose make it possible. To do this, treat the surface with special acrylic primer. Make sure that it has completely covered the surface and that there are no transparent or translucent spots. Only in this way can OSB sheets be protected from moisture. Let the surface dry and apply a reinforcing cloth. This should protect the plaster from cracking.

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

Tip: when working outdoors, make sure that the panels receive enough time to dry. Therefore, pay attention to the weather forecast and choose the most dry day during the work.

Preparation of OSB board for plaster (both inside and outside the house)

Plaster cannot stick to smooth OSB sheets. Due to the fact that this material is supplied without a protective treatment against moisture, it swells quickly and is thereby damaged. In order to fix this, mechanical adhesion intermediaries are needed. Alternatively, sticky paint can be used. Suitable, for example, galvanized iron mesh. It should have sufficient strength and be well fixed.

Foundation preparation

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

Tip: Press firmly on the net so that it does not slip and is well fixed. Allow the prepared base to dry well before continuing.

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

OSB plastering

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

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

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

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

As a rule, a plastic bucket is sufficient to mix the solution. Finishing mixtures are now mixed with water, resulting in plaster. To knead, place the mixture in a bucket and add and add water in the quantity indicated on the package. For mixing, you can use a drill with the appropriate nozzle. After mixing, the solution should be left for 10 minutes.

These tools and materials are necessary for plastering:

• Flat trowel
• Plaster grater
• Level
• Rail
• Putty knife
• Plastic containers
• Drill
• Drill head
• The finished mixture, or, respectively, cement, slaked lime and sand

1. First, using a spatula, evenly distribute the solution on the wall. Material consistency is important for speed and other work processes. The mixture should not be too wet or too dry. Thanks to the optimum mixing ratio, you get enough time to ensure an even coat of plaster.

2. In addition, plastering requires a rail. It should be long enough and can be made of wood or metal. It serves to evenly distribute the plaster on the wall surface. Pull the rail from one side to the other so that the surface becomes smooth.

3. After this, you should pay attention to empty places, troughs. Report the solution there and go over the staff again to make the surface even.

4. These operations should be performed until a smooth surface is obtained and the plaster has sufficient thickness.

5. Use an aquatic building level to check for uniformity. If you find small irregularities, then you will have to modify them until the surface becomes perfectly smooth.

6. Then use the wide spatula, slide it along the wall. He will remove the excesses of the solution, and even small irregularities on the wall will disappear.

7. Allow the solution to dry before proceeding.

8. After the solution has dried, you can correct minor irregularities - the task will already be simpler.

9. After completion of work, the plaster should dry for several days.

10. If you plan to paint the plaster, then first you need to apply a gypsum mixture. And when finishing do not use a grater - the surface should remain smooth.

Features of plastering OSB boards

The edges and places of the seam are an important point when plastering OSB boards. Special seam tapes that can be used for edges are on sale. Self-adhesive versions are especially easy to handle. To prevent cracking in the joints, versions with artificial fibers can also be used as plaster. Additives provide the most flexible form and the material is easily stretched. This reduces pressure and the risk of cracking.

Oriented particle board (OSB), it is also OSB (OSB or OSBI) is perfect for construction. These plates are increasingly being used in house building. This is especially true for the construction of frame houses. They are used both for cladding facades outside, and for arranging interior space inside. Therefore, the question of which method to prefer for interior decoration is relevant for each owner of the house.

The main types of decoration

In the quality of interior decoration, the walls of which are made of OSB, you can use different methods. The choice is always the owners. A brief list of finishing work that is suitable for OSB is given below:

• wallpapering
• painting
• varnishing
• decorative putty and decorative plaster
• gluing tiles or ceramic tiles

All of these finishes have one thing in common. The surface of the OSB must be prepared in a certain way before the finishing coat is applied.

The weakness of oriented particle boards is essentially only one. This is the ability to absorb and gradually accumulate moisture. Over time, swelling and deformation of the entire plate or part thereof occurs. Therefore, the surface of the OSB should be isolated from exposure to high humidity. And here many people have a question: is it better to putty the walls of the OSB or cover them with a layer of plaster?

Initially, the puttying process is used to seal joints between the plates and to align the walls. This layer serves as the basis for applying paint, pasting partitions with wallpaper and, oddly enough, for the finishing layer of plaster. So the conclusion is quite definite: putty is an element of the rough finishing of the premises.

So plastering the interior walls of the OSB is quite possible. This, along with others, is a fairly common decoration method that designers often use. It should be added that the use of a conventional sand-cement mixture in this case is not recommended. There are special varieties of plaster that are designed for internal work with OSB panels.

What plaster is used for indoor OSB

Plaster, in this case, is used to create the last layer, which largely determines the design of the premises. These mixtures are called decorative plaster. For wooden surfaces, it is recommended to use compounds that have high adhesion. We are talking about polymer-based plaster mixes.A layer of such plaster "breathes" and prevents the formation of fungi and mold. The plaster layer contributes to a significant reduction in sound permeability and heat preservation. It is environmentally friendly and absolutely safe. The wall covered with plaster looks absolutely uniform. Joints between plates and other defects are hidden. Such coverage will last more than twenty-five years.

Plaster mixes are sold in finished or dry form. Dry varieties before application should be diluted with water or another reagent, in accordance with the instructions. It is very important to make sure that OSB boards are rigidly fixed and not subject to movement.  Only then can you get to work. Otherwise, the plaster may crack and in places begin to peel off.

OSB decorative plaster indoors. Types, characteristics.

Decorative plaster can be classified according to two parameters: the composition of the filler and the type of adhesive components. By the type of filler, one can distinguish Venetian, structural, textured and flock.

Venetian plaster capable of forming a smooth surface when applied. It contains an admixture of the smallest marble chips. This gives the surface a mirror finish.

Structural mixture  has small impurities of quartz and other components. The surface is rough. Its main difference is that when applied to a wall, colorful spots appear on it.

Textured plaster  may be of various forms and include impurities of any suitable material. It can be small pebbles, pieces of mica, silk fibers or other fabric. Wall panels coated with this mixture have a pronounced texture, which is determined by the filler.

The most difficult to work seems flock mix. But she is very advantageous in design. The fact is that it consists of three layers - the main layer with flocks and varnish. Pieces of dried acrylic paint are used as flocks.

Types of decorative plaster for indoor OSB composition

By the presence in the mixture of different binder components, the textured plaster can be divided into the following types:

• mineral
• acrylic
• silicone
• silicate

AT mineral plaster  cement acts as an astringent. It is not very suitable for OSB, since when hardening it is afraid of shock. Although the finished layer only gets stronger over time, it lacks a certain plasticity. In the event of an accidental impact, a piece of coating may come off the wall.

Acrylic plaster  made on the basis of acrylic resin. Compared to the previous mixture, it has lower strength and durability. It has many color schemes. You can color the mixture yourself by adding a special colored paste. It is quite suitable for application to the prepared OSB surface.

Synthetic resins serve as a binder for silicone decorative plaster. It is very flexible and can easily be applied to the wall. Silicone plaster is moisture resistant, vapor permeable and antiseptic. There are many color variations. This type of textured plaster fits perfectly into the solution of the task.

Silicate Plaster  It stands out because liquid glass is used to create an astringent effect. The hardened surface has increased strength, moisture resistance, vapor permeability and antifungal effects. Such plaster will last a long time, up to fifty years or more. This option can also be used to work with OSB.

Relief of textured plaster for OSB in the house

According to the shape of the surface relief, the most famous types of textured plaster are: “lamb”, “bark beetle” and “fur coat”.

"Lamb"  has a fine-grained structure, due to the filler from small unprocessed pebbles.

The plastered surface "Lamb".

Bark beetle  resembles a tree that has been attacked by bark beetles.

  Plastered surface "Bark beetle"

"Fur coat"  has a smoother surface than the first option, since the filler in this case is cement.

  Plastered surface "Fur coat"

OSB surface preparation

As already mentioned, the decoration of walls and ceilings from OSB sheets indoors takes place in two stages. The first, draft, includes the preparation of the facade of the slabs for the finish coating. The second, finishing, consists in applying the plaster to the prepared base.

Surface preparation begins with sealing joints between the plates. To do this, it is advisable to use acrylic or silicone sealant. After completing this operation, it is recommended to get rid of all visible bumps and defects using a grinding machine. If this is not possible, then you can walk along the walls with ordinary sandpaper.

  Sealing joints with sealant.

Walls should be cleaned of dust with a vacuum cleaner. For ceilings, all processes are similar. If necessary, wipe the surface with white spirit. After that, the first coat of primer is applied. Best applied acrylic primer with additivesthat improve its properties . Adhesion class primers have also proven themselves well.  They contain fine quartz chips, which helps to keep the putty on the walls. After the solidification of the first layer of soil is complete, the operation should be repeated.

Next in line is puttying the walls. For OSB panels, there are specially designed mixtures. It is better to use adhesive-based putties.  Before applying the composition, a special metal or plastic mesh is attached to the walls, which contributes to a better fit of the putty. The easiest way to mount is with a construction stapler. Then the first layer of putty is applied. The mesh should completely hide under the mixture. To create a perfectly flat surface, you can putty the wall a second time when the first layer dries.

In the next two videos, the preparation process is shown clearly.

For more details about the intricacies of the choice of putty, preparation of the base and putty can be found in a separate article:.

After that, you can come up with a decorative coating, whether it be wallpaper, paint, or decorative plaster.

Application of decorative plaster indoors

The selected mixture is prepared as described on the packaging. Work is not much different from puttying. However, for the wall surface to look as it was intended, some skill is required.

A flat spatula is used to apply the mixture, as shown in the figure. The plaster is carefully applied in several layers. The layer thickness is small, within one and a half to five millimeters. As a rule, two or three layers are enough. It is very important to ensure that before applying the next layer, the previous one has dried and gained strength.

  Plastering on the prepared surface

This is the basic scheme of plastering internal surfaces from OSB. It should be noted that for each type of decorative plaster there are certain nuances when applied. This type of finish is relatively inexpensive. And if everything is done correctly, the resulting interior will satisfy the most demanding taste and will last for many years.

  An example of Venetian stucco with a pattern.