Selection of paint for OSB boards and painting technology

What are the advantages of painting?

The use of properly selected paints and varnishes will give the owners of a house lined with OSB boards the following advantages:

• less effort and time when compared with traditional wall decoration;
• the ability to mask the texture if it is created by large enough chips;
• protection from moisture – the surface does not suffer from deformation, because water does not penetrate inside.

Painting OSB for interior decoration is used only for interior decoration, because the outside of the slabs will experience serious influence from the environment. The base will require more serious protection. This should be remembered by everyone who is interested in how to paint OSB boards inside houses.

Which paint is best to choose for exterior painting of OSB boards?

What is the best way to paint OSB outdoors? Despite the wide choice, it is worth taking a closer look at the special compositions intended for painting OSB boards. This is a paint-primer that has a number of advantages:

• Its composition already includes additives that provide protection from moisture and ultraviolet radiation;
• Good adhesion to the wood-chip surface is a guarantee that the paint will not fall off several weeks after painting;
• The dense structure of the paint eliminates the appearance of the natural texture of the slab;
• The composition allows air to pass through, which ensures good vapor permeability;
• The primer paint is sold in white, but with the possibility of adding any color.

This is an ecological composition, water-based with the addition of mineral fillers, acrylic components and antiseptics. This type can be used both for surface preparation and for decorative purposes.

It already contains additives that provide protection from moisture and ultraviolet radiation.

What features need to be considered when choosing paint for OSB

When choosing a paint coating for OSB, it is necessary to take into account certain features of this material.

Adhesion of paint and varnish coatings and OSB boards

Some paints adhere very poorly to the surface of the OSB board due to poor adhesion between the materials. This happens because OSB boards are initially impregnated with resins and do not absorb paint well. For painting OSB, it is not recommended to use water-based paint and other water-soluble compositions. It is necessary to give preference to acrylic or other polymer-based compositions.

OSB board texture

A special feature of this material is its pronounced texture. The surface of the slab is uneven and rough - this increases paint consumption and requires preliminary preparation before painting.

Age of OSB board

OSB boards that are not properly protected with coatings and have stood outside for more than one year are the worst to paint. Under the influence of ultraviolet radiation and humidity, the quality of the surface of the OSB board greatly deteriorates. Even paint specially designed for OSB boards does not adhere well to such surfaces. In this case, for high-quality painting, the surface must be cleaned of dirt, sanded and treated with antiseptics.

Why do you need painting?

OSB boards are painted for many reasons.

• Firstly, a layer of paint forms a stable, dense film on the surface, which provides additional protection from exposure to excess moisture and ultraviolet rays;
• Secondly, some coloring compositions have a fairly dense texture, which allows you to completely smooth out the uneven surface of the slabs. Not many people like the pristine appearance of this finishing material;
• Thirdly, painting is the most cost-effective way to protect and decorate the surface of OSB boards. Often this reason plays a decisive role.

How to paint OSB board outdoors

If you choose paint for exterior use, make sure that it contains special additives that protect against ultraviolet radiation. Otherwise, under the influence of sunlight, the surface will quickly delaminate and require repainting.

When choosing how to paint an OSB board on the outside, you should give preference to polymer-based paints, which are recommended for coating wooden surfaces. They fit well on uneven surfaces and reliably protect the base from exposure to ultraviolet radiation and precipitation. Before applying a coat of paint, you should prepare the surface, level it and apply a primer. It is better to putty large holes and joints.

When applying paint, follow the manufacturer's instructions. Continuous painting in one color favorably highlights the expressive structure of OSB boards and prevents the penetration of moisture.

Suitable for painting external walls and facades:

Oil paints.

This is one of the best and most reliable options. They are quite viscous and poorly absorbed into the slab. This paint takes a long time to dry, but forms a durable protective layer with good performance characteristics.

Modern alkyd enamels and specialized alkyd-based paints for wood panels.

They penetrate deeply into the structure of the slab and last a long time. Walls painted with alkyd paints do not need to be coated with a protective varnish - this significantly reduces finishing costs.

Acrylic paints.

They cover unevenness well and allow you to achieve a uniform tone. If you treat the exterior walls with a mold-resistant primer, you can paint them with quality waterproof acrylic paints.

Professionals believe that the choice of material for painting OSB slabs outdoors is determined by the characteristics of the slab itself and its operating conditions. Modern waterproof polymer-based coatings better protect walls from moisture penetration and active ultraviolet radiation than water-based paints. At the same time, acrylic paints make it easy to wash and clean painted boards, and compositions based on latex, alkyd resins or polyurethane form a durable, impermeable film on the surface.

Selection of compositions for interior painting

How to paint OSB inside? This can be done with acrylic, latex, oil, or polyurethane paint. The latter creates additional protection for the inner surface of the slab. The requirements for paint and varnish material for finishing the internal surface are not so stringent. When choosing paint for interior decoration, you should consider the following parameters:

1. What kind of OSB sheet is used. The main thing here is the type and quality of the wood, as well as the characteristics of the binding material.
2. Decoration method. Does the buyer want to paint the surface while maintaining the wood structure or completely masking it?
3. Which area is to be painted? Will it be walls, floors or ceilings.
4. The nuances of the room itself. Specifically what room you plan to paint.

With a limited budget for repairs, oil compositions come out on top - economical in consumption, with a good degree of adhesion and hiding power. Stain or varnish for finishing the external surface has two functional meanings (protection and decoration). When processing the interior space, they are needed to preserve the structure of the wood.

A similar sequence is followed here: apply the product in any convenient way, treat it with a primer, and varnish the surface.

Latex paint is ideal. It dries quickly, is absolutely harmless and fits well on the surface. However, at the same time, it is overpriced, is not entirely resistant to temperature fluctuations, and requires application in several layers. To paint rooms with minimal moisture content, water-based OSB paints are used. The main advantage is that such walls allow for regular wet cleaning.

Latex paint dries quickly, is absolutely harmless and adheres well to the surface.

How to paint an OSB board inside a house

When choosing paint for interior decoration, it is necessary to take into account compliance with environmental requirements. Not all varnishes and polymer-based compositions can be called harmless to health.

If you are going to paint OSB boards indoors, you are better off with the following options:

Acrylic paint.

It is perfect for walls and floors inside the house. The surface is uniform in tone, leveled, with good coverage.

Stain + varnish

If you prefer the natural texture of OSB boards, use an idea popular among designers. They advise using stain or patina-effect compositions to give the desired shade, and then covering the surface of the slab with varnish, vinyl or polyurethane-based.

It is worth mentioning separately about such a variety of paints and varnishes as glazing azures. Glazing azures are transparent, thin paints that can give wood a certain shade and preserve its texture. Glazes can be produced on both acrylic and alkyd bases. Acrylic-based glazes, as a rule, can be used for both interior and exterior work, and alkyd-based glazes can only be used for exterior use.

Some manufacturers allow the use of glaze on OSB boards

When using these coatings for exterior finishing of OSB boards, pay attention to the ability of the coating to withstand UV rays. Taking into account the texture of OSB boards and the decorative capabilities of glaze paints, it is possible to obtain very attractive surfaces of various shades

What to consider when choosing a coating for OSB

When choosing paint and varnish material for OSB, consider:

• The size of the wood chips, which determines the texture of the slab.
• Facade or interior covering.
• Planned method of treating slabs before painting.
• Microclimatic conditions.

OSB is a textured material; its bonding function is performed by resins that do not allow paint to be absorbed. Therefore, the degree of adhesion of particle boards is low. It is not advisable to paint OSB with water-based pigment compositions, since they will not adhere well. Polymer paints are preferred.

It is problematic to paint slabs that have stood for several months without protection from climatic factors. Dampness and ultraviolet radiation negatively affect the quality characteristics of the finishing material. Adhesion deteriorates even with paints designed specifically for OSB. Before painting, the surface must be cleaned, sanded, and treated with an antiseptic.

High demands are placed on interior paints. They must be environmentally friendly and harmless to the body. Paint and varnish products containing volatile toxic substances are unacceptable. The flooring requires paint with high resistance to abrasion, liquids and household chemicals.

Staining

Another way to design OSB is to treat it with stain. This is a composition that gives wood a tint, but does not create a film on its surface.

Treatment of OS boards with stain:

1. Sand the surface with sandpaper, drill or grinder with a special wheel.
2. Remove dust.
3. If there are cracks, fill them with putty and sand them again.
4. Apply the composition in 3 layers. The first and last along, the second across.
5. After the last layer has dried, sand the surface of the slabs again with sandpaper or a wheel with the finest grain.
6. Remove sanding dust.

Stains, like impregnations, protect the painted surface from rotting, moisture, and impart fire-retardant properties. The coating can be transparent, translucent, or completely opaque. There are stain varnishes on sale that combine the properties of both types of paints and varnishes. They simultaneously protect the surface, give a beautiful shade and create a glossy film.

Unusual dyeing methods

No matter how carefully you polish the surface of the slabs, it is very difficult to completely mask its characteristic pattern using ordinary paint.

This type of finish is not suitable for every interior. Therefore, there are several ways to perform decorative painting.

Imitation of stone surface

This technology will require a lot of time and patience, as it involves multi-layer painting.

• First of all, draw or download from the Internet an image with the desired stone pattern. Do not choose too intricate textures, they will be difficult to reproduce;
• Determine how many colors you will need and paint the desired surface with a base color primer paint. Usually the lightest shade is used as the base shade. Please note that the surface does not need to be sanded. To ensure that the paint is evenly distributed over an uneven surface, it is best to apply it using a spray gun;
• After the paint has dried, lightly clean the surface to emphasize the relief and make it deeper;
• Using a pencil, transfer the outline of the stonework from the image to the floor surface;
• Now paint the outline with a thin brush and darker paint;
• After this, individual “pebbles” can be additionally tinted with other colors to add volume;
• After this, update the outline in the right places;
• After the paint has dried, the result is secured with varnish.

Painting with plaster effect

This method does not require the performer to have artistic talent.

• First of all, the surface needs to be sanded. The purpose of sanding is only to remove the layer of wax protective coating;
• Padding;
• Application of pigment primer. The color should be chosen based on personal preferences;
• To obtain a pattern like in our photo example, a white primer was used;
• After the soil has completely dried, the surface is ground again, but using a wheel with a finer grain;
• Removing dust from the surface;
• Next, you can apply a composition with the effect of mother-of-pearl or patina, or you can do both, but in turn. Each composition must dry before applying the next. Patina will give an aging effect. After applying it, you need to wait 5-7 minutes and walk over the surface with a block of sandpaper;
• Clean the surface from dust;
• Secure the result by applying clear or tinted varnish.

Tags: Enamels and paints

Features of applying compositions to OSB boards with your own hands

Work is carried out in warm, dry, windless weather, preferably cloudy

Painting work begins in warm, windless weather, recommended air temperature is +10-25°C. It is advisable to avoid direct sunlight, which will lead to uneven drying. First of all, the composition is applied to the edges of the panels. These areas are characterized by the greatest absorption. Then the entire surface is evenly covered with paint. Movements with a brush (roller) are performed in one direction. It is recommended to apply a thin first coat and avoid wide overlap of stripes. After the paint has dried, a second layer is applied. If the expected result is not achieved, a third coat will be required.

There are several coloring options that can be used to finish the slabs.

Applying stain

The application of stain will allow you to emphasize the structure of the material, giving it a deeper shade. The composition is diluted with a solvent and applied with a spray gun. After drying, the surface is coated with polyurethane varnish.

Artificial aging

Artificial aging

To give the slabs a stylish decorative effect, special varnishes and patinas are used. The process is complex and consists of many stages:

• the surface of the plates is polished;
• a barrier primer is applied;
• the slab is coated with a white matte primer;
• the top layer of the coating is removed with a grinding wheel;
• the plate is treated with acrylic varnish in 2-3 layers;
• A black patina is applied to the OSB using a sprayer;
• The surface is polished to provide an aging effect.

The work takes a lot of time, it is necessary to take breaks and wait for each applied composition to dry. Artificial aging preserves the texture of OSB, but without noticeable chip protrusions.

Painting with primer paint

Facade primer-paints for OSB combine the properties of a finishing coating, primer and bioprotection. They have the necessary adhesion and good hiding power. They are applied to the textured surface of the slabs in two layers, in one the stripes are placed vertically, and in the second horizontally. The work is performed with a fur or foam roller, previously soaked in water. Before use, the primer paint is stirred until smooth. After drying, the result is an elastic, non-flammable and vapor-permeable coating with a service life of up to 10 years. The OSB texture does not show through it. The composition is sold in white, but there are thousands of color options.

Relief paint

Relief paint

To create a relief coating, silicone, latex or alkyd water-dispersed paints are used. Thick viscous compounds do not need to be diluted. They are applied to the primed surface with a wide spatula or roller. The layer should be 1.5-2 mm. The relief is created by mineral chips or filler fibers. The design is created manually by treating the surface with a dry roller. The intensity of pressure regulates the depth of the texture.

Slab preparation and painting technology

If you prepare OSB sheets, then any paint will lay on them more evenly. The slabs need to be painted when they are fully assembled and in place, since the installation process always requires adjusting the corners, followed by sanding, filing, and so on.

The slabs need to be painted when they are fully assembled and in place.

Stages of painting OSB boards

Having decided how to paint the OSB outdoors, the preparatory work should begin with sanding.

• The surface needs to be sanded to remove small irregularities and improve the texture. It is better to perform this action using a grinding machine, since the entire area needs to be processed. Both OSB-4 and OSB-3 boards especially need grinding;

  
  The surface needs to be sanded to remove small irregularities and improve the texture.

• Puttying is a process necessary for sealing microcracks and joints between slabs. However, experts do not recommend wasting putty and time on masking the seams and borders of the slabs, since after painting they will still remain. At the end of the work, it is better to cover them with profiles or planks;

When choosing OSB sheets, attention should be paid to the quality of the wood. There should be no small particles of bark on the surface, as they will subsequently peel off. Outside, this process will accelerate.

Puttying is a process necessary for sealing microcracks and joints between slabs.

• Priming is done using acrylic or water-polyurethane based varnishes. They are diluted with water in a ratio of 1 to 10. If an alkyd-based varnish is used, then it is diluted with a solvent. The main thing is that the composition is applied slowly, gradually, allowing it to be absorbed into the surface.

  
  Priming is done using acrylic or water-polyurethane based varnishes.

Coloring and subsequent drying. You need to rely on recommendations from the manufacturer, taking into account the characteristics of paintwork materials. Painting begins from the edges of the slab and then spread over the entire surface. The edges are painted in 2 – 3 layers. Each subsequent layer is applied 8 hours after the previous one has dried. You can paint anything, fortunately the range of paints and varnishes allows you to do this. It is very important to comply with the conditions for coloring natural materials, taking into account their characteristics.

General characteristics of slabs

Technical characteristics of OSB boards

Materials with specific markers are suitable for each specific purpose. The installation technique depends on the structure of the product.

Among the main characteristics it is worth highlighting:

• Density. The indicator can vary from 640 to 700 kg/m³.
• Fire resistance level. Elevated marker. G4 involves treating the slabs with fire-resistant solutions.
• Paintability. Often such panels are coated with various types of varnish.
• Manufacturability. Susceptibility of the material to sawing, cutting, grinding and standardized installation.
• Swelling. The figure ranges from 10 to 22%.
• Fastener holding capacity. The fibrous texture ensures a strong hold even on the outer edge of the sheet. Fastening with self-tapping screws, nails and staples is allowed.

Maintaining the appearance and structure

Many people like the unusual texture of OSB boards, and they do not want to cover the natural pattern of wood chips. Whereas they paint OSB boards, which have an unusual appearance, in order to both preserve the beauty of the wooden structure and protect the house from bad weather.

On video: methods of decorative coating of OSB panels.

When deciding how to cover an uneven surface, consider clear paint with a UV filter. This varnish is created on the basis of alkyd resins; its components reliably protect the slab from external aggressive influences. The varnish gives a matte tint to the chipboard and preserves the pattern and structure.

Transparent varnish can be:

• water based;

• oil based;

• on acrylic base.

A matte or semi-matte acrylic varnish for exterior use will give a beautiful look to a painted slab. It is convenient to apply, and to obtain a better effect, you can treat the surface of the OSB board with water-based impregnation.

Types of paints for painting OSB boards on the facade

The modern building materials market offers many types of paint and varnish products. But not every paint can be suitable for painting an OSB board on a facade. What and how to paint correctly should be decided after a thorough acquaintance with the properties of paints and your financial capabilities. When choosing paints, you need to remember that oriented strand panels are 90 percent wood

This means that you should pay attention to the area of ​​application and their properties first of all. Let's take a closer look at some types of paint and varnish products.

Alkyd

Alkyd paints for painting facades are most loved by finishers and home-grown builders. Such paints are perfectly absorbed into wood and dry quickly due to the water component. But this is associated with a small disadvantage of this paint. It needs to be stored only at above-zero temperatures, although in a hardened state it can withstand frost up to 30 degrees. Negative features also include low resistance to fire and alkalis. But despite this, paints of this class are popular due to:

• absence of unpleasant odor or harmful secretions;
• quick drying, retaining color for a long time, that is, they do not fade;
• excellent hiding power or the ability to create a flat, smooth surface without streaks;
• long service life without changes in quality;
• relatively loyal price.

Acrylic

Acrylic facade paints for exterior use are no less popular than alkyd paints. They consist of a polymer component, color and water

The most important property important for outdoor service is the ability of paint to create a durable film on the surface being painted. At the same time, acrylics are endowed with good adhesion to WWS

These two qualities significantly influence the demand for these paints for facade finishing. Manufacturers have learned to create acrylic mixtures not only of beautiful, rich colors in the widest range, but with different physical characteristics. Surfaces treated with acrylic paints can be matte or glossy, transparent or dull. In addition they:

• dry quickly and have sufficient strength;
• suitable for covering porous, loose surfaces, such paints do not spread;
• have excellent water and vapor resistance;
• paints withstand sudden temperature changes well and withstand weather problems well.

Oily

Oil-based paints are among the traditional and oldest. But, in comparison with modern coatings, they are certainly losing their position, since, despite all their popularity, they have some harmful qualities, such as:

• increased toxicity - it is recommended to work with oil dyes only in protective equipment, even outdoors;
• it takes a long time to dry, since the basis for the manufacture of such paints is drying oil;
• experience is needed to apply the coating evenly because drips often form when painting;
• low resistance to weathering, which means short service life, annual updates.

Positive aspects include good absorption into the painted surface and unpretentiousness to storage conditions. Thickened paint is easily thinned with drying oil.

Latex

Latex-based paints perform well on wood materials. To produce such paints, ordinary water, acrylic resin, and latex polymer liquid substance are used. It is this that transforms ordinary acrylic enamel into a coloring mixture with additional properties. For this purpose, polyvinyl, silicone, and other additives are added to the main composition in order to improve performance characteristics. Facade latex paints are produced to produce OSV textured or dense, shiny, semi-gloss or matte.

Water-based

In addition to the water-based paints described above, there are also types of water-based paints that are successfully used when finishing external walls made of OSB panels and more. These paints can also be used to paint concrete and stone materials, which must be treated with putty and primers before finishing. Water-based painting emulsions are:

• silicate paints, the main component of which is liquid potassium glass; such paints are endowed with the highest possible resistance to steam;
• silicone paints, which are based on silicone resin and fungicidal additives; after drying, they do not allow water to pass through and repel street dust and dirt.

Methods for finishing OSB facades

OSB boards, which are made by pressing wood chips, are not the easiest material for facade finishing. The chips in the two outer layers of the board are perpendicular to the chips in the inner layer, and although all layers are impregnated with glue, OSB is considered a material that is not resistant to weathering and ultraviolet radiation.

But, despite the fact that the debate on the topic “is it possible to make external cladding of a house from OSB” still does not cease, many FORUMHOUSE participants believe that “this game is worth the candle”: in terms of speed, ease of installation, and especially - low cost of such a facade.

And, as practice has shown, if moisture-resistant OSB-3 (or OSB-4) is used for facade work, then all the horror stories about “swelling” are completely refuted by time. Under one condition - that such a facade will be closed (“protected”) from the effects of external unfavorable conditions as quickly as possible.

BirdofpreyForumHouse Member

If you want to throw away money, then you can use OSB as a finish, and a complete one at that.

OSB is a moisture-resistant material, that is, it tolerates high air humidity without changing its physical and mechanical properties. But, like any material made from untreated wood, it absorbs water when directly exposed. Such a facade should be closed in the very near future, says our expert, head of the SOPPKA project, Artem Vladimirovich Solovyov.

Artem Vladimirovich SolovyovHead of the SOPPKA project

Having extensive experience, high-quality feedback from our clients, as well as recommendations from OSB manufacturing plants, we can say with confidence that leaving the slab outdoors for more than 1-2 months will have the most negative impact on it.

How long a slab can remain outdoors without protection or finishing without losing its performance depends on weather conditions, but with regular interaction with water it will inevitably change its physical and mechanical properties. Also, the slab is exposed to ultraviolet radiation; under the sun it darkens, the binding resins burn out, and the top layer of wood chips begins to peel off.

Soloviev Artem Vladimirovich

We do not recommend leaving OSB unprotected over the winter. If the stove has been used in atmospheric conditions for more than a year, it must be restored because:

• the destruction of the top layer of the slab began;
• The stove, due to moisture, may be affected by fungus.

OSB consists of 90% wood, so for finishing the facade made of OSB or SIP panels, you can use the same materials as for wooden house construction.

The most popular finishing options for such facades include:

• siding;
• fake diamond;
• clinker tiles;
• ceramic tiles imitating brick;
• decorative plaster;
• painting.

Method of application of compositions

The slabs consist of pressed and glued wood chips. Both surfaces do not have the required smoothness for applying paints and varnishes - they are rough. This feature gives it a special texture, but painting or wallpapering will require surface treatment of the building material.

Manufacturers produce several models of panels. 1;2 for front finishing and 3;4 for frame construction. The second option is cheaper, has the appropriate characteristics, but its use requires thorough processing.

Covering enamels

Before painting an OSB board on the street or in the house, you need to determine the types of enamels and paints that hide the protrusions of the chips.

Floor slabs covered with enamelSource pinimg.com

Among them, the following options are offered:

Latex. High level of moisture resistance, an excellent option for buildings located near water. Good covering ability. Not demanding on the surface condition. Facade paints can withstand many freezing cycles.

Latex paintSource gidkaminov.ru

Water soluble. It is considered the best option: inexpensive, withstands temperature changes, the influence of moisture and sun, and allows air to pass through. Can be used in winter. Do not use at temperatures of 20 degrees below zero. Such paints are also called acrylic.

Acrylic paintSource static.tildacdn.com

Pentaphthalic. They have a high level of viscosity and adhesion, forming a smooth and dense surface. They practically do not absorb moisture. Small expense. It takes a long time to dry, not for outdoor use. Instability to the influence of sun and moisture.

Pentaphthalic paint optionsSource farbagroup.com.ua

Alkyd. They have all the characteristics for facades. Forms a moisture-resistant film. The color does not change under the influence of ultraviolet radiation. They can withstand large temperature changes for any region of the country.

Alkyd paintSource gidpokraske.ru

Silicone. Dear ones, they fully meet the requirements for facades. Resistant to mechanical action, moisture and cracking. Used for slabs that have previously been whitewashed or painted.

Silicone paintSource caparol161.ru

So, it’s up to you to choose how to cover the OSB board indoors. Consider the performance and aesthetics you want. It is not recommended to use water-dispersed formulations. They contain a lot of water, which can deform the slabs.

Tinting

Stain makes it possible to emphasize the texture of wood. The required shade is obtained by adding acetone, solvent or water. The diluted stain dries within 5-10 minutes. The stain preserves the natural grain of the wood and protects it from the sun and moisture. Apply with a spray gun/brush. A layer of polyurethane primer is applied on top.

To achieve an aging effect, patina of any color will be used. When the patina has dried, sanding with a soft sponge is carried out to remove any remaining material. After this, the panel must be coated with transparent varnish.

Artificial agingSource pinimg.com

Transparent coatings

How to paint an OSB board to preserve the texture: for this purpose, special transparent compounds with a UV filter, water repellents and stabilizers based on alkyd resins are used. Can be used outside, providing protection from the negative influence of the environment.

Plates with transparent coatingSource teremforum.ru

You can preserve the natural appearance of the slabs using the following compositions:

• impregnation – provide good protection of the material;
• glazes are the most effective, they preserve the design and add shine;
• varnishes – provide gloss, protect from moisture, and give a special shade.

In some cases, slabs can be varnished in several layers. The process is long because the material takes a long time to dry. But this allows you to get a fairly strong, durable and reliable coating that will thoroughly protect the wood.

Fire protection

When OSB burns, harmful substances are released, the smoke becomes very dangerous even with a small fire. At the same time, you can increase the fire protection and paint the surface with Soppka paint. It is designed for such slabs, has high adhesion, lasts more than 15 years and can withstand various negative influences.

Fire protection for OSB boardsSource diymall.co

OSB can be painted with various specially developed paints. They allow you to give an aesthetic appearance, extend the service life of the panel and increase fire resistance properties. Enamels have a high covering ability, do not change color over time, and protect against rot.

How to use Tikkuril Vinha

1. Coating antiseptic for finishing wood:
   façade walls
2. window frames
3. lining boards
4. For painting new surfaces and surfaces treated with covering or glazing materials:
   sawn
5. planed
6. log
7. with pressure impregnation
8. with industrial priming
9. Do not use on floors

We sell a wide range of paints and varnishes for various purposes. It is convenient to choose a suitable water antiseptic, primer or façade glaze by visiting the section

Tikkurila for exterior woodworking

Advantages of Tikkurila Vinha

1. Emphasizes the structure of the tree
2. Excellent hiding power
3. You can paint over old coatings of fundamentally different shades - the old paint is completely covered in 2 times
4. Economical consumption
5. Creates a water-repellent protective film
6. Protects against moisture, blue stains and mold
7. Resistance to weather and mechanical influences
8. Advantageous purchase of Vinha Tikkuril - the price depends on the volume of the order
9. Can be diluted with water
10. Noble semi-matte shades

Tikkurila Vinha technical data...

Color	VVA base – white, VC – colorless base
Tinting	Color catalog "Vinha" 30 colors
Gloss level	Semi-matte
Consumption	Sawn surface 4 – 6 m2/liter, planed and log surface 8 – 10 m2/liter
Diluent	Water
Packing	0.9 l, 2.7 l, 9 l, 18 l
Application method	Apply by brush or spray. When applying by airless spray under high pressure, use a 0.018" - 0.023" nozzle, dilute 0-10% by volume
Drying time at +23ºС and relative humidity 50%	Unstuck - 1 hour. The next layer can be applied after 2 hours

Complementary organic based primer coating:

Valtti Pohjuste

A colorless antiseptic based on natural linseed oil is excellent as a primer for Vinha. It is universal and applicable to all plank and log structures. The impregnating material creates a water-repellent, even layer on which the finishing paint lies smoothly. The only thing you should know is that this primer does not provide protection from direct sunlight, so it must be painted without delay.

Accompanying water-based priming coating:

Valtti Aquabase

Tikkurila Vinha paint also goes well with this colorless oil-based primer. It is diluted with water and is suitable for external priming of plank facades, structures, window frames, lumber and logs. The primer is quickly absorbed and forms a waterproof layer, inhibiting the development of rot and blue stains. The composition is not intended to protect against UV, so in this case you should not delay painting either.

We help you select the necessary paints and varnishes and will be happy to advise on all products of the Finnish brand, including Tikkuril Vinha. Buying paint of the right shade is not a problem. We will tint the composition in the color of your choice according to catalogs and fans with the manufacturer’s original colorants. The color selection and computer tinting service is provided free of charge.

Semi-matte, water-borne protection for exterior wood surfaces that keeps the wood grain visible. Acrylate with the addition of alkyd was used as a binder. Forms a water-repellent, wood-protecting surface.

Application area.

Designed for painting new or previously treated with Vinha coating protection or glaze materials on external wooden surfaces, sawn and planed surfaces, log surfaces, as well as pressure-impregnated wood. Also suitable for industrially primed wooden surfaces. Not suitable for floor treatment.

Objects of application.

It is used for processing external walls, window frames, lining boards, etc. surfaces.

Preparatory work

Before you begin work, you should know what preparation should be for painting and finishing OSB boards. Its quality determines the further consumption of the paint and varnish and its appearance.

1. The sheets are polished to remove manufacturing defects.
2. Fill cracks with sealant.
3. Level the surface with putty (it is recommended to use an acrylic composition for this purpose).
4. Sand the dried layer with fine-grained sandpaper.
5. Apply primer.

Before painting OSB indoors, you should pay attention to the commercially available primer options. They come in three types:

• acrylic;
• alkyd;
• adhesive.

Acrylic primer is odorless. This primer is easy to apply and wash off from tools. The line of acrylic compositions includes antiseptic mixtures that prevent the appearance of fungus and mold. They are suitable for processing OSB sheets inside the house and for work related to wallpapering.

Alkyd primer. It is used only in conjunction with alkyd paints. This type of primer is universal: it is good for both interior work and when processing facade panels. The only drawback is the strong smell.

Adhesive primer. This composition is almost never used when painting OSB boards inside a building due to the quartz filler included in the base of the primer mixture. After using adhesive agents of this type, additional sanding of the surface is required.

Preparing for painting

Since OSB is a textured fabric, it must be carefully processed to reduce paint consumption. Preparing slabs for painting involves 3 activities:

• Sanding is a method of eliminating texture. The significant roughness of the slabs is due to their manufacture from large wood shavings. OSB should be processed with a grinding machine. Moreover, grinding must be thorough and intensive, especially when using high-quality moisture-resistant boards. You will have to remove the varnish coating from them so that the paint adheres well.
• Putty is a method of eliminating unevenness. With its help, minor recesses are sealed. To remove a deep defect, an oil-adhesive putty is useful; it is also suitable for leveling out unevenness from fasteners. The putty slab must be sanded again. Putty is not used on OSB joints; after painting they will still be noticeable. Decorative linear inserts are used to hide them. When using latex and other elastic compounds, putty becomes an optional processing step.
• Primer is a means of increasing the adhesion of paint to the surface. Most often, polyurethane or acrylic varnishes are used. They are diluted according to the instructions, usually 1 liter of concentrate is added to a 10-liter bucket of water. You can also take alkyd varnish; to dilute it you need to use a solvent. An adhesion primer is needed to protect light painted surfaces from oil and tar stains. The soil should be laid tightly and slowly to ensure high-quality impregnation of the slab.

A little introduction

Even before I started working with these boards, I learned from my friend that OSB is a composite element that is created by gluing wood chips. Polymers and various resins are used for these purposes.

How to paint OSB indoors

There is also a classification of this material, which you should not forget about when purchasing OSB boards:

• OSB 1 - suitable for interior design of rooms where there is a low level of humidity
• OSB 2 – for rooms with normal humidity
• OSB 3 – for high humidity levels and floors that can get wet
• OSB 4 – are the most moisture resistant, they are used for load-bearing structures

For my room I used OSB 3 - together with OSB 2 they are best suited for interior decoration. Deciding to play it safe once again, I chose this particular class, but if you are confident in the humidity of the room, then you can use the second class, it is usually a little cheaper in cost.

Paint with stain

Stain of different shades will help emphasize the texture of the wood, while the composition will protect the slab from destruction. The choice of color is due to the variety of stains on the building materials market:

• oak;
• chestnut;
• cherry;
• nut;
• tobacco;
• wenge.

Technology for coating OSB boards with stain:

1. Apply stain with a spray gun or brush.
2. Leave until completely dry.
3. Apply the primer.

After covering the wall with stain, you can create an artificially aged effect on it by covering the surface with a patina. After it dries, remove the remaining composition with a soft sponge and cover the wall with colorless varnish. The varnish will protect the surface and give it additional effect.

general information

Material Details

Oriented Strand Board (OSB) is a composite material made from wood chips glued together using various resins, adhesives, polymers, etc. As a rule, OSB is made from aspen waste, but panels made from other materials are also found.

To protect the composite from moisture, it can be impregnated with a water-repellent composition or painted.

Depending on the characteristics of the chemical composition (impregnations, fillers, protective coatings, etc.), these products are classified into:

• OSB-1 - used for interior decoration of rooms with minimal humidity. They practically do not contain moisture-protective components.
• OSB-2 - used in rooms with normal humidity.
• OSB-3 - used for finishing walls and ceilings where there is a risk of getting wet or where there is increased background humidity.
• OSB-4 is the most durable and moisture-resistant variety. Such slabs should be purchased for the construction of load-bearing structures.

As a rule, panels of the second and third categories are used in finishing work. These are the ones we will focus on in our painting recommendations.

Benefits of painting

Finishing oriented strand materials using paints and varnishes has a number of advantages:

• Firstly, a layer of paint on the surface acts as an additional protection against moisture. Water does not penetrate into the thickness of the slab, which means the surface is not deformed.
• Secondly, the use of modern paints makes it possible to disguise the texture of OSB, formed from fairly large chips.
• Thirdly, this technique is less labor-intensive and expensive than cladding with decorative panels.

Protective painting technologies are used both in everyday life and in industry.

As a rule, after painting, the treated slab is covered with a layer of varnish. This will protect the pigments from fading, and the base itself from damage.

Wet facade on OSB

Recently I came across an interesting finishing option; it turns out that OSB can be immediately finished with “Bark Beetle” type plaster. The Holzer Elastish system is an innovation in the design of facades of frame houses.

One of the main problems in the use of decorative plasters and paints when finishing the facade of a frame building is significant deformations of the structure (OSB, DSP, etc.) during operation, which are inevitable, both in the case of using a wooden frame and when using lightweight thin-walled steel structures (LSTS). The applied materials crack and deteriorate over time.

With the Holzer Elastish system, finishing the facades of frame houses with decorative plasters and paints has become possible. Simple, cost-effective and reliable design of a frame structure with materials from the Elastisch series.

Holzer Structurefarbe Elastish paint is intended for the installation of decorative textured coatings in finishing systems for the facades of frame houses. The paint can be applied to prepared surfaces of cement-bonded and fiber cement boards, OSB, as well as concrete, brick, plasterboard, plastered and other mineral substrates.

The manufacturer claims the following advantages of Elastich series materials:

• Resistant to deformation caused by temperature changes.

• Reduce energy consumption for heating the room due to greater tightness of the building. • They are elastic and durable. • “Breathable” materials with vapor permeability. • Wide selection of color and decorative solutions. • Do not form cracks. • Warranty for more than 30 years. • Has no analogues.

Unfortunately, Elastisch is a fairly new material for us; I haven’t found any statistics on it yet, but the description of the material is not bad. Frame houses have been built all over the world for decades, so there must be such finishing materials, and this is probably the first one that has come down to us. As new materials appear, we will add their descriptions and characteristics.

In the video below you will see how OSB successfully resists moisture for several years.

• Vapor permeability of OSB
• Construction of a frame house - video
• Frame house construction technology
• How to cover a roof: choosing roofing materials

How to prepare OSB boards for painting

The technology for preparing facades made of OSB boards for painting is the same for all types of paints.

Pore ​​filling

First of all, it is necessary to fill the pores that the OSB board has. Each tree contains hundreds of microscopic pores per square centimeter for the passage of water and nutrients. After the OSB board is formed and pressed, the sheets are polished. After grinding, microscopic pores open, and not only moisture can get into them, but also spores of mold and putrefactive fungi.

If the consumer wants to leave the natural appearance of the OSB board and cover it with a transparent wood varnish, then a special filler varnish must be used.

Grinding

After the first application, the surface is sanded. This is a required step.

Sanding is done because the varnish raises microscopic fibers and the surface becomes like a hedgehog. These fibers are removed by sanding.

After the first layer of filler, apply the second. To obtain a high-quality surface, each subsequent layer of enamel or varnish is sanded. If such quality is not required, then grinding the primer or filler does not need to be done.

Before painting OSB, you need to select a primer. Its purpose is to fill pores in wood and create a preparatory layer for painting.

Primer

The industry produces five types of alkyd primers, and only glyphthalic is suitable for OSB. It is universal and suitable not only for wood, but also for concrete, glass and other materials. Glypthal primers (GF) can be used indoors and outdoors. They are liquid and easily penetrate into pores.

Their use not only significantly extends the service life of OSB boards, but also makes the painted surface water-repellent. Apply GF primer with a brush or roller. Drying time at room temperature is at least 24 hours.

Glypthal primer is fire hazardous and toxic. It is recommended to use it outside or in a ventilated area; a respirator will not help here.

OSB boards must be primed several times with intermediate sanding of each layer until a flat and smooth surface is obtained. Why do you need to sand each layer? The fact is that the soil, filling the pores, creates a waviness that is invisible to the eye. And although these waves are measured in hundredths of a millimeter, in the sun, due to light and shadow, the OSB surface receives spots visible to the eye.

How to paint OSB correctly

OSB is a board made from layers of pressed wood chips, in which the chips in the outer layers are perpendicular to the chips in the inner. It consists of 90% wood, 10% binder resins. The main problem of this material is its lack of resistance to the sun and moisture; under their influence, the slab can swell and become deformed.

But practice shows that if you close the slab as quickly as possible from adverse external influences, it will not swell (provided that OSB-3 and OSB-4 boards were used for exterior finishing). Such a facade will serve for a long time and reliably.

Most paints do not adhere well to OSB due to the binder resins in the board. Poor adhesion between materials is a really big problem, and this literally baffles many Mastergrad forum participants:

“The country house is sheathed with moisture-resistant OSB (oriented strand board). The surface is smooth. It looks like a tree, but on the other hand, there is almost nothing left of the “pure” tree.

What kind of paint should I use to paint this, wood or regular façade paint?”

OSB correctly

Finishing OSB is a process that consists of several stages:

• surface cleaning;
• material protection;
• OSB surface preparation;
• decorative OSB coating;
• OSB finishing coating.

As a result, we get a smooth, perfectly painted surface, protected from external influences.

Everything is clear about cleaning the surface: before starting finishing work, the surface of the slab must be clean, dry, free from dust and traces of old coatings.

Sealing seams

Let's take a closer look at sealing the seams - this is an important stage that cannot be skipped if we are interested in the facade serving for a long time and impeccably.

OSB boards, like any wood materials, react to increases in temperature and humidity and increase in volume. Therefore, they are mounted with gaps of 3 mm wide.

The most vulnerable place of OSB is the ends; they are not moisture resistant, they swell under the influence of precipitation, and mold and various fungi simply love to settle on them.

— OSB is a moisture-resistant material, but until moisture gets to the end of the slab. The ends are not moisture resistant! The slab swells at the edges, but after drying it does not shrink back. In short, it behaves like a banal chipboard,” wrote a member of our forum with the nickname sansan21.

Therefore, the joints must be sealed - this is the only way the material will be protected from moisture penetration. The seam must be elastic, and for sealing it is recommended to use a compound with elasticity up to 200%, specially designed for long-term protection of OSB boards. One of the main advantages of such a sealant is its high adhesion to paint and varnish materials. It is resistant to ultraviolet radiation and moisture, retains heat well and protects the slabs not only from getting wet, but also from freezing. This sealant has high thixotropy, so it can be applied to any surface: vertical, horizontal, or inclined at any angle.

Let us remind you once again that all connected slabs must be:

• clean;
• free from remnants of old coatings;
• low fat;
• dry;
• in winter – cleared of snow and ice.

To ensure a neat seam, the front edges of the structure must be protected with adhesive tape before starting work.

The cartridge cap is cut to the width of the seam, the sealant is applied from a special gun with a tight seam without voids and smoothed with a flat spatula. If the seam is not as perfectly smooth as you would like, it can be corrected with a damp cloth. It is very important that no moisture gets on the seam during the first five hours, so sealant should not be applied in rainy or snowy weather. And once dry, it will become moisture resistant. The sealant dries at a rate of 2 millimeters per day, but forms a surface film within an hour.

If everything is done correctly, such protection will last at least 15 years.

Surface priming

There are two types of soils:

1. Adhesive are simpler compounds that are designed to create adhesion to substrates. In the case of WWS, this is relevant due to the weak absorbency of the slabs.
2. Insulating - creates a dense coating. For OSB, this is relevant primarily because it prevents yellow tannin stains from bleeding from the board onto the painted surface.

According to our experts, when dealing with OSB, you need a primer designed specifically for this complex material. It guarantees good adhesion between the slab and future coatings. Decorative plaster, putty, paint will fit perfectly on OSB treated with such a primer, and if we are talking about interior decoration, wallpaper will stick perfectly to the primed surface. Ordinary soil does not guarantee this.

In addition, the primer for OSB will protect the slab from precipitation and ultraviolet radiation, and it is even used to treat the façade for protection until the finishing coating is completed. You can treat OSB with this primer and safely leave the facade for a year until finishing.

The primer is vapor permeable, has an elastic structure and good adhesion, so it is easily applied to the slab. It protects OSB from mold and mildew, strengthens the porous structure of the board, makes it less absorbent and saves the consumption of the finishing coating.

This is a ready-made composition, it is applied in 1-2 layers with an interval of three hours. The composition lays down smoothly and does not form voids. The primer is white, matte, translucent.

Puttying slabs

In principle, after the last layer of primer has dried, you can proceed to painting the OSB board, but it would be better to putty it. This way we will level the slab and seal all remaining unevenness and joints. Our experts recommend puttingtying OSB regardless of whether it is indoors or outdoors. The surface will not only be leveled, it will become stronger, more durable, and most importantly, cracks will never appear on it.

It is very important not to change the sequence of steps and be sure to apply primer before filling. If you apply putty to an unprimed slab, it will most likely crack.

Before use, the putty must be mixed thoroughly. The putty is applied in two layers.

• The first layer is to be peeled off!
• the second layer is leveling. It should not be too thin, the thickness in one pass is up to 5 millimeters.

After application, each layer must dry. At air temperatures from +5 to +35 degrees, complete drying takes from a day to two.

When the putty is completely dry, it needs to be sanded and you can proceed to painting.

OSB staining

Special paint for OSB does not just create a beautiful semi-matte finish. It will be vapor permeable and allow the slab to “breathe”, and will also provide excellent protection from the sun and moisture. Paint can be both an independent finishing coating and a reliable basis for final finishing.

Painting clean, dry, primed and, ideally, leveled OSB is completely different from painting an unfinished board. And the process is much simpler (as if you weren’t painting OSB), and the result is better.

Before applying the paint, you need to mix it well and add any acrylic color. It is better to paint with a roller with a good set, in two layers, in good weather (calm, clear and dry). The paint will dry touch-free in half an hour, completely dry in a day.

How to speed up facade painting

If this technology seems too complicated and time-consuming, you can use a three-in-one product to paint the facade. This is a special facade primer paint that can be applied directly to the slab. Practice has shown that this is a very good option. It is this paint, specially developed for OSB, that has good adhesion to the slab. It paints the slab well and does not leave those famous translucent spots. It contains bioprotection components, and is resistant to moisture and ultraviolet radiation, that is, it slows down the aging of the slab. The requirement for the painted surfaces of such primer paint is one: they must be dry and clean: no dirt, grease or peeling surfaces. Then everything is simple: mix the paint, if it is too thick, then dilute it with water (but in an amount of no more than 5%) and apply it to the surface with a roller or brush. You can paint at an air temperature of at least 10 degrees, and the temperature of the composition should be the same.

conclusions

You can act like your neighbors, buy any paint, as long as it’s cheaper, get exhausted while applying it, and end up with an unknown coating. There are many such stories on the Mastregrad forum:

“Of the paint available (for free) was PF-115. To achieve at least some significant result, I had to paint in three layers. The first one was absorbed like a sponge. The ceiling was hemmed with another OSB, obviously of better quality. We painted it with latex paint, but it didn’t stick very readily. I was dragging around for a brush and the coating turned out to be streaky.”

So, it is more correct and ultimately more profitable when working with such a complex material as OSB to use compounds designed specifically for it. Only in this case will we get a smooth, perfectly painted surface, and the OSB itself will be reliably protected from destruction. Time, rain and sun cannot harm her.

What is OSB board?

The first OSB boards were 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.

The first houses made using frame technology required reliable cladding that was resistant to sunlight and moisture. Wood was not suitable for this type of installation, as its installation took too much time and effort.

Traditional fiberboard panels also could not be used for their intended purpose, because they were too heavy. In addition, experts have noticed that such material is afraid of fumes.

After selecting the options, we developed a special technology based on laying long wood chips. The chips are glued together under the influence of wax and special resins that can withstand moisture.

OSB panel technologies make it possible to build a house from a frame with reliable cladding material without any special financial costs. This type of panel can be affected by any of the carpentry tools designed for cutting.

The panels are applied to the facade of the building using carpentry adhesive, which is made on a synthetic basis.

OSB panels are divided into four types according to strength:

1. OSB-1 is a panel that is often used in rooms with a dry microclimate prepared for work. It should be noted that this type of panel is used only in interior work;
2. OSB-2 is also used for interior decoration of premises, such as bedrooms or living rooms. But an important condition is the presence of dryness in the home;
3. OSB-3 class boards are made with increased strength and resistance to moisture. They are suitable for interior and exterior work;
4. One of the most durable boards is OSB-4. It can withstand significant loads and is durable. The cost of the material is significantly higher than that of other types of panels.

OSB-3 is often used in construction, as it has an affordable price and meets the basic requirements for quality products.

Preparation of material

Proper preparation greatly influences how high-quality the final coloring result will be. The more thorough the preparation, the higher the adhesion of the material and base to other surfaces. Then the decorative layer will last much longer.

There are several important rules:

• Painting can be done before installing the panels, if this is permissible. But this option negatively affects the appearance of the structure. Therefore, more often they still process the cladding, the installation of which has already been completed.
• Sanding is carefully carried out on the surface of the slabs. Standard sandpaper works fine. This will not only allow you to disguise the structure of the slab itself, but also get rid of the layer of protection that often prevents the primer from penetrating deeper.

The OSB-3 variety requires particularly careful grinding. The wax-varnish coating cannot be removed so easily.

Pre-processing is performed in the following sequence:

1. We use putty to level the surface of any parts and places where screws are attached. An adhesive-oil base is the best choice.
2. The seams between the slabs are sealed with an adhesive-oil mixture. But the boundaries often become visible and remain a little noticeable. Advice from experienced craftsmen is not to waste time trying to disguise the material, but simply hide the seams themselves with the help of decorative elements.
3. When the putty dries, it must be sanded until the surface is perfectly smooth. How OSB can be covered is a separate question.

The priming process is as follows. Here's what you can use:

• The simplest option is water-based varnish for wooden surfaces. Acrylic or acrylic-polyurethane compositions are diluted using a ratio of 1:10. Then they are applied to the slabs until the impregnation is uniform.
• Alkyd varnish is one of the available alternatives. But for dilution they use not water, but white spirit or other similar means. Then the painted item will look better.
• A good alternative is the so-called adhesive primers. Such compositions help create high-quality surface protection from paint.

Painting slabs indoors

The process can be performed in two ways, depending on preference. But preliminary preparations are carried out, almost similar to those for external areas. The only difference is that moldings are not used to hide seams inside the house, unless provided for by the interior design.

Classic method

This method involves simply applying OSB paint to the wall surface. After preparing the base, the decorative mixture is mixed and applied evenly and sequentially in several layers to all treated areas. If putty was previously used, the painted surface will be uniform, but if it is absent, a strong or weak texture will be observed, depending on the amount of material applied.

Painting OSB without prior puttying allows you to preserve the texture of the material

It is much easier to treat the floor: after sanding, it is prepared and covered with 4-5 layers of clear varnish.

Decorative method

To decorate the base of oriented strand panels beautifully, you can use various techniques. For example, aging of the coating. Instructions:

1. The slabs are carefully sanded and primed until smooth.
2. Acrylic patina is being prepared. It is quickly applied to the desired areas or the entire surface. The longer the mixture sits on the base, the richer the color becomes.
3. The solution is wiped off with a rag.
4. Next, you need to paint the material with a light shade to highlight the darker areas.

An alternative method would be to simply layer several colors, but each subsequent layer should be “softer” than the previous one.

Is it possible to paint OSB boards with facade paint?

When answering this question, it is necessary to remember that the OSB board consists of wood material; therefore, to treat the surfaces of OSB boards, you can use any material intended for facade work on wood.

These can be various impregnations, enamels or facade paints . Depending on what effect you want to achieve by treating the surface of the OSB board, choose the required material. They can be either pigmented or colorless.

In the first case, the texture of the slab is painted over and a solid, dense, colored coating becomes boring. The second case involves increasing the severity of the texture of the slab.

When using facade paint as a material for processing OSB boards, you need to know some features of carrying out such work:

1. Considering that the OSB board has sharp corners , which can cause cracking of any type of paint and varnish coating, it is necessary to begin work by sanding these areas.
2. The edges of the slab are characterized by a higher level of porosity than the rest of the surface, so these areas require additional sealing measures.
3. Preliminary preparation of the surface of OSB boards using a primer is mandatory. It is necessary to increase the degree of adhesion and reduce the level of water absorption properties.
4. The painting process requires multiple layers of paint , with each layer being as thin as possible.

Choosing paint for OSB

It is possible to obtain a truly high-quality result in terms of both technical and aesthetic criteria only if the construction and decorative mortar is chosen correctly. In order not to make a mistake, when deciding how to paint the OSB board on the facade, focus on the following possible options.

Alkyd paint

It consists of resins welded from a special mixture, acids and vegetable oils. After drying, this type of paint leaves a thin but durable layer of film on the surface, which protects from the external environment.

Advantages:

• cheap price;
• the coating provides a moisture-resistant insulating layer;
• does not fade in the sun, tolerates frost well down to -30°C;
• dries quickly;
• non-toxic.

Flaws:

• ignites quickly;
• afraid of alkaline exposure;
• It stinks when painted and dries.

Important! This type of enamel is suitable if you need to paint OSB boards on the facade and inside the house. Popular brands among buyers: Tikkurila, Enamel, Farbex

Acrylic mixture for painting OSB

The composition of this enamel includes water and acrylic, as well as elements connecting them. When the paint dries, the water evaporates. Only the polymer protective film will remain.

Pros:

• simplicity and ease of use;
• large assortment of colors;
• cheap price;
• high moisture resistance and resistance to temperature changes;
• has fire-resistant properties;
• no unpleasant odors during application;
• service life up to 10 years. There are no disadvantages!

Important! When storing, follow the rules:

• cannot be stored in the cold;
• do not dilute with water.

Can be used for both internal and external work.

Latex enamel

Latex mixtures also refer to water-based dyes, but a synthetic rubber polymer (latex) is added to their composition. Like all paints and varnishes, it has its advantages and disadvantages.

Advantages:

• high moisture resistance;
• reliability - after application, a thin, durable film of latex appears on the surface, which can be wiped with a damp cloth;
• thermal insulation - the latex base additionally gives the walls thermal insulation qualities;
• very economical - when applied it is distributed in a thin layer;
• non-toxic;
• dries very quickly;
• long service life.

Flaws:

• does not hide wall defects; the painting surface must be well prepared;
• does not tolerate sub-zero temperatures;
• there is a high probability of the development of fungus and mold; additional treatment of the walls with special means will be required;
• high price.

Important! Can only be used for interior work

Oil paint for OSB

Oil mixtures are made on the basis of drying oil. This is a traditional look if you need to paint an OSB board on a facade, but it is too outdated and has many disadvantages:

• shallow penetration into wood;
• toxicity;
• long drying time - more than a day;
• short service life;
• high price.

Important! Can be used both indoors and on the facade of buildings. Service life inside - 3 years, and outside the building - 2 years

Manufacturers of quality paint: Coloray, Syntilor.

Scuba diving

The main composition of scuba gear includes:

• water;
• microwax;
• means for antiseptic treatment;
• modifiers.

Advantages:

• non-toxic;
• a film appears on the painted area, which protects the wood from moisture and dirt;
• has antiseptic properties;
• there is no pungent odor, which allows you to work in enclosed spaces;
• easy to use;
• There are brands of varnish that can withstand sub-zero temperatures and direct sunlight. Due to these properties, they are widely used for processing OSB both inside and outside buildings.

Important! When choosing aqualac for the facade, make sure that it contains frost-resistant and sun-protective additives

What is fire protection?

OSB boards burn as well as any wood product. During the combustion process, very caustic substances are released into the atmosphere, including poisonous hydrocyanic acid.

Often it is toxic smoke that leads to irreversible consequences. To increase the resistance of OSB to fire, special compounds called “fire-bioprotection” are used. The most common at the moment are 2 compositions:

• "Soppka". This is a paint with the addition of resins, which is designed specifically for application to OSB. Unlike conventional antiseptics, it is thicker and more viscous. After drying, a durable film is formed on the surface, which is not washed off in the rain due to the deep penetration of the composition into the structure of the base. The service life of the coating exceeds 15 years;
• "Valtti Color Satin". This is a high-quality facade glaze that has a high covering ability and protects wood from rotting.

Both compositions, in addition to fire protection, are also antiseptics that prevent the development of mold.

Painting nuances

Wide brush

To apply each coating, it is better to use a separate tool suitable for the characteristics of viscosity, relief and absorbency.

You can apply coloring compounds using:

• roller
• wide brush
• spray gun

Recommended combinations of paint and tools are shown in the table.

Type of paintWhat is best to apply

Water-based	Roller with pile from 1.5 cm and above
Alkyd	Felt roller or fine-pore foam tool
Relief water-dispersion	Hair roller
Latex	Wide flat synthetic bristle brush
Embossed	Spatula with blade width 500 mm

Tips for the dyeing process:

1. When using alkyd paint, the roller is first dipped into the solution and then rolled out on a horizontal surface so that the mixture is evenly distributed.
2. The recommended path of the roller along the wall is in the shape of the letter W: a vertical strip from top to bottom, two strips at an angle of 20 degrees and again a vertical strip from bottom to top.
3. When painting with silicone paint, the primer should also be silicone-based for better adhesion
4. Relief paint is applied with a spatula, but distributed over the surface with a roller. The thickness of the paint layer and the nature of the relief depend on the forces applied to press the roller.
5. The edges of the building material absorb more paint than the front surface, so they need to be covered very carefully
6. Structural elements made of OSB are painted at a humidity of no more than 60%
7. When using transparent paints, it is better to choose those that contain inhibitors
8. It is preferable to apply 2-3 thin layers of paint rather than 1 thick one.

Coloring Tips

• When painting slabs with a roller, right-handers should apply the composition starting from the left corner of the room, and left-handers should apply it from the right. First, a line is made along the entire height of the surface, the second strip is drawn from the bottom up, shifted to the side by 15 cm. Then the angle changes, and the roller must be moved downwards. The roller movement should resemble the Latin letter W.
• To achieve a smooth surface, you need to apply the paint in a few words. Depending on the method of painting the slabs and the selected paint, 2 to 3 paintings may be required.
• When applying several layers, you need to wait for each layer to dry completely.
• The edges of OSB and joints need to be painted more carefully and carefully, since they absorb much more dye.
• If transparent paints are used, you need to choose formulations with inhibitors.
• To refresh the facade, 6 years after painting it, you need to reapply the paint. To make application comfortable, the composition can be diluted to a liquid consistency.

Painting technology

How to paint OSB boards? First you need to prepare the material itself. The slabs need to be primed, then the covering enamels will lie more evenly. The only problem is that the surface of the new slab is smooth: the primer collects in drops. Therefore, do not waste time - if you decide to paint a new slab, do not treat it with OSB, but immediately start painting.

After standing for a while, the slabs become rough; they absorb the soil composition well. Therefore, before painting OSB slabs, they are impregnated with Ceresite.

If you decide to paint OSB boards carefully following all the technology before painting, the stages of preparatory work will look like this:

1. Surface priming.
2. Installation of fiberglass mesh.
3. Puttying treated surfaces.
4. Painting.

Floors made of OSB boards are treated in the same way before painting. With this step-by-step work, the result will please you. But you can apply paint or enamel directly to the finished surface in different ways:

• spray gun;

• wide roller;

• with a brush.

Which method to choose - see for yourself. You can quickly paint a house with a spray gun, but only in the absence of wind. Brush – long, roller – the best option. If you take a wide roller, you can cover the surface of the house facade quickly and evenly.

Painting the slabs should be carried out in several layers - this way the paint will lie more evenly, creating a dense, bright film on the surface. Start painting from the top, so the paint will not flow onto the already painted surface. Work should be carried out outdoors in dry, windless weather.

Well, our miracle house is ready, and not every passerby will guess that under an even layer of enamel there are initially unsightly OSV panels. The painted facade of a house is easy to maintain and unpretentious - wash painted surfaces periodically, do not use aggressive abrasives that can damage the surface - and admire the results of your labor.

Tips for creative finishing of OSB boards (1 video)

Paints for coating OSB boards (27 photos)

Why is it necessary to paint OSB façade slabs?

If the facades of buildings are planned to be finished with clapboard, siding or expanded polystyrene, which will provide the necessary insulation of the house, then painting OSB boards is necessary to improve the technical characteristics, in particular, moisture resistance, non-flammability, etc. For this purpose, emulsions or special compositions are also applied. This finishing is completed with any inexpensive acrylic paint. Paintwork will protect the applied compositions from loss of properties due to the passage of time or cyclical changes in humidity, temperature, and so on.

Painting OSB can be one of the options for finishing a house - the paintwork must be façade and provide the following properties:

• Reduces flammability;
• Moisture protection;
• Guaranteed aesthetics of the exterior;
• UV protection;
• Protection against mechanical damage due to precipitation, frozen ice, and so on;
• Types of materials for painting OSB outside the house;
• The following paints are used to treat such surfaces;
• water-based.

Recommended paint and tool combinations

The choice of tool for painting OSB will depend on the type of paint. To apply water-based, alkyd and oil-based paints, it is better to use a brush or roller.

If the consistency of the coloring agent is too thick, the composition must be diluted with solvents to prevent smudges and stains.

• Water-based or water-dispersion paint is diluted with pre-purified water heated to room temperature.
• Alkyd and oil paints are diluted with white spirit, turpentine or RS-2.

• The optimal tool for applying water-based paint is a roller with a nap length of no more than 1.5 cm.
• It is better to apply alkyd dye with a felt or fine-pored foam roller.

Before applying paint, the roller is placed in the mixture and then carefully rolled out in a special basin (paint bath). This is done to evenly distribute the composition throughout the instrument.

Water-dispersed paints are best applied with a fleecy roller. The slabs are painted with latex paint using a wide flat brush. Relief type dyes do not need to be diluted. If they are too thick, then you need to apply the mixture with a spatula 40-60 cm wide. The thickness of the applied layer should not exceed 1.5 mm. To obtain the required relief, you can use a dry, large-pored roller. The formation of the relief will depend on the force of pressing the tool.