OSB (OSB in transliteration) or OSB sheets are in demand in draft repair construction works Oh. To obtain a non-trivial result, they are occasionally used in finishing, finishing. What is stopping people? First of all, rumors that OSB boards are unhealthy. Let's try to figure out how dangerous they are to humans.

Brief description of OSB

Oriented strand board is a building and finishing material, 86-90% consisting of large finely planed wood chips up to 25 cm long and no more than 4 mm thick chips. The rest of the total mass is thermosetting synthetic resins, special additives and additives.

Manufacturers offer 4 types of slabs for different purposes:

• OSB-1 - thin sheets for packaging, furniture blanks, temporary structures, etc.
• OSB-2 - used in rooms with normal humidity (no more than 60%). Applications: interior roughing, including leveling floors, walls, ceilings and primary cladding (utility boxes, roof sheathing in warm attics, SIP panels, etc.).
• OSB-3 - moisture resistant boards that can be used both outside and inside premises (in the bathroom, kitchen, bathhouse, laundry, etc.). Can be used as a leveling layer for exterior finishing under plaster, thermal panels, facing clinker plates or bricks, siding and other types of curtain facades
• OSB-4 - reinforced high-density slabs used to form load-bearing structures.

Basic physical and technical characteristics of OSB are shown in the table below:

The advantages of OSB are widely known through advertising:

In the pluses, we also write down the low coefficient of change in geometric dimensions with changes in temperature and humidity. Thanks to this characteristic, the material can be mounted with minimal gaps around the perimeter of the room.

Now let's look at the disadvantages of OSB:

• High percentage of slabs swelling in direct contact with water. This indicator for sheets of some manufacturers reaches 25%;
• Difficulties with laying communications and replacing insulation under the mounted OSB sheets;
• Combustible or fire hazardous material. The risk of fire is slightly reduced when treated with fire retardants (Rogneda, Novbytkhim);
• Biodefeated. Mold, fungi, rodents and bugs are dangerous for the stove;
• High price. OSB from well-known manufacturers (Egger, Glunz) is 30-60% more expensive than gypsum board or chipboard in similar dimensions.

The disadvantages of the material are not limited to this list. According to market research, potential buyers consider the harm of these stoves to human health the biggest disadvantage. The main criterion here is the concept of "environmental friendliness". Let's take a closer look.

OSB sheets - harm or benefit?

An environmentally friendly product is a product that, according to research, does not harm the environment and users. Applied to OSB greatest harm people can bring formaldehyde, phenol and methanol fumes. Where do they come from?

The thing is that synthetic resins such as phenol-formaldehyde, urea-formaldehyde, melamine-formaldehyde and many others are used as a binder.

The advantages of polymer binders make it possible to produce inexpensive, high strength products. But the disadvantages of their use are so significant that they repel potential buyers. This is, first of all, their toxicity both before solidification and after.

Poisonous flammable gases such as formaldehyde, phenol, benzene, methanol and others are emitted. They belong to allergenic, mutagenic and carcinogenic substances, provoke skin diseases, as well as diseases internal organs, including reproductive, respiratory and cardiovascular systems, eyes.

Although many GOSTs and SNiPs were canceled or underwent serious processing towards mitigation, some construction and Decoration Materials still have to undergo a sanitary and hygienic examination. Based on the results, a certificate or conclusion is issued for each batch. The document specifies the test methodology, limit values ​​(MPC) and the results obtained. They can be used to judge how harmful a particular product is.

In the Russian Federation today, it is customary to mark OSB and its analogues according to the European standard DIN EN120, which determines the emission class of formaldehyde and some other toxic substances:

• E3 - up to 30 mg per 100 g of dry matter;
• E2 - 10-20 mg;
• E1 - up to 10 mg;
• E0 - up to 6.5 mg.

For example, let us give the maximum permissible concentration for formaldehyde in atmospheric air - 0.003 mg / m 3, and in household water - no more than 0.05 mg / l.

In accordance with this classification, OSB of the E0-E1 class is produced by such giants as Glunz (Germany), Norbord (Canada),Egger(Austria)... The harm is minimal, and the advantages are obvious, therefore they are recommended for use inside residential premises with subsequent cladding (including children's rooms, hospitals).

Products marked E2-E3 (Kronospan, Kronopol) can only be used for outdoor work, including roof cladding of non-residential attics, supporting structures in temporary shelters, etc.

Serious manufacturers, as a rule, willingly provide their products for additional voluntary checks. Thus, the Austrian company Egger periodically receives a Blue Angel certificate confirming the environmental friendliness of its products.

Unfortunately, a rare Russian plant can boast that its products are tested for harmfulness and comply with the high standards of DIN EN120. OSB of many manufacturers does not pass the tests. The Federal State Healthcare Institution "Center for Hygiene and Epidemiology" some time ago published data independent expertise OSB boards (manufactured in the Russian Federation): the formaldehyde content in the ambient air at +20 ° C is 0.067 mg / m 3, that is, 22 times higher than the MPC norm.

If you are going to buy OSB, you can determine the harm of products:

1. Pay attention to the smell of the sheets. Toxic fumes give the characteristic harsh "aroma" of formalin or cheap plastic.
2. Ask the seller for a copy of the certificates certified by the blue seal of the supplier or directly from the manufacturer.
3. Inspect the packaging if possible. Large factories mark it and additionally complete it with inserts with basic information.

Do not save on your health - in order to minimize harm, choose products labeled E0-E1 from trusted manufacturers.

Wood waste materials have all the positive qualities of natural materials and a lower cost. Modern technologies made them stronger and more resistant to water and fire. Frame construction is becoming more and more popular. People like a house made of OSB slabs, a warm, light, long-lasting forest smell. By ordering parts in accordance with the project, you can build a house with your own hands without lifting equipment and wet works.

How to build a house from osb?

Improved qualities of natural wood in OSB panels

Wood surpasses all other natural materials in its qualities that create comfort in the house. Its disadvantage is swelling from water and fire hazard. Rodents and insects love to settle in warm walls destroying them prematurely.

A lot of waste is left in the production of solid wood products:

• small pieces of wood;
• branches;
• chips;
• sawdust;
• shavings.

They are sorted, connected in various ways and pressed. The panels are obtained, taking from the tree its best qualities.

The production of OSB panels uses large chips that make up 80% of the slab weight. It is laid in layers, orienting the direction of the outer sides along the sheet. Internal chips are located across. The perpendicularly oriented fiber eliminates warping and shrinkage of the panels. Pressing and impregnation with synthetic resins makes the material more resistant to fire. It is non-flammable and does not support combustion, but it will char and degrade. At the same time, toxic substances are not released.

OSB panels for building a house

In construction, 4 groups of OSB panels are distinguished by strength and moisture resistance. The table shows the main application of each type.

Walls made of OSB panels retain heat and absorb noise slightly worse than natural wood. The material has high environmental friendliness. The lack of wood in its combustion and moisture absorption is eliminated by impregnation, additives and pressing.

When making home parts from panels with your own hands, you should take into account the peculiarities of the location of the fibers and hardness. OSB is cut and drilled worse than solid wood.

Frame houses are cheaper and quick to assemble

Frame house

The construction of residential buildings from OSB boards is done according to an approved project. Blocks are made at the plant, they are marked. A light foundation is made on site and then the frame of the house is mounted on it and sheathed with the resulting details. Insulation is laid during the production of blocks. This construction method has several advantages over standard brick buildings.

1. You can move into the house immediately after laying the roof and do the decoration or simply varnish the walls inside.
2. Construction is done in a dry way and takes less than a month along with the creation of the foundation.
3. A frame house is 3 - 5 times lighter than a brick one. A light foundation is made under it to a shallow depth or support-columnar.
4. There is no need to use lifting devices to erect walls and roofs.
5. The smooth surface of the panels is finished without complex plastering. There is enough putty for painting and wallpapering.
6. The material of the OSB panels is used for insulation of brick and wooden house... Additionally, expanded polystyrene or other extruded plastic is laid inside. The warmth in the house is retained better than with brick walls 1 meter thick.
7. It is comfortable inside the house, the walls breathe.
8. They do not shrink.
9. There is no waste during installation, the blocks are made at the factory to size.
10. Price frame house from OSB is much lower than brick.

Frame houses also have their drawbacks. If you want to have a basement in the house, you need to do strip foundation to its entire depth or dig and lay out the walls separately, at a distance from supporting structure... It is more difficult to hide the wiring with your own hands. Do not hang heavy equipment and cabinets on OSB walls.

Construction of frame houses

We build a house from OSB on our own

If you want to build a house with your own hands from OSB, then you will need helpers. The optimal number for work is 4 people. You can get by with the minimum number of hands - 2 builders. Then one must have experience in assembling frame houses... The second one is to be able to understand it, submit it, hold it back.

1. A waterproofing layer is laid on the foundation. The lower harness is on it.
2. The racks, the corners of the walls are fastened and the fastening is made diagonally, which prevents the structure from "folding".
3. The upper harness is mounted.
4. Floor and floor beams are laid.
5. The frames of the openings are installed.
6. Rafters are installed and sheathed.
7. The floor and overlap are covered.
8. Sheathing with OSB panels is made.
9. Sealing extensions are installed at the corners and joints of the panels.

When building with your own hands, the walls outside and inside are sheathed separately in a residential building. Insulation is laid between the layers of OSB, wires and life support systems are laid.

Advice! Self-tapping screws are poorly screwed into OSB, warped. It is advisable to drill a hole for them. The drill diameter must be smaller than the screw thread.

For thermal expansion along the perimeter of the floor, a gap of 3 mm is left between the panels and the uprights. Between the slabs themselves, the gap along the entire sheathing is 2 mm. Wall panels do not reach the floor covering 10 - 12 mm. The finishing gap is closed by skirting boards.

Floor panels are laid on beams across their location. There should be at least 3 crossbars under each OSB board. Along the length, the ends of the sheets are connected on a bar. Both edges are secured with self-tapping screws. The spacing between the floor beams is 500 - 600 mm.

A house built from OSB panels can freely withstand outside temperatures from 40 degrees below zero to the same heat reading. The comfort of buildings is not inferior to brick buildings with insulation and wooden houses... The walls breathe, drawing moisture out. The air inside remains fresh. Fungus and mold do not appear.

OSB sandwich panel

DIY osb sandwich panel house

OSB sheets are also used to create sandwich panels. The space between the two slabs of pressed chips is filled with expanded polystyrene. Such a house is assembled by a specialized team. Sheathing, installation and fasteners are used similarly to the structure of buildings from sandwich panels.

The frame and lining of the openings are made of a board 3 cm thick. The starting profile is a strip in width equal to the groove in the end of the panel. It is fastened along the entire perimeter to the foundation with metal brackets. The panels are fastened together with a bar. They are fixed to the uprights with long screws.

The interior of the buildings is inferior to the houses made of OSB boards in aesthetics. Therefore, such technologies are rarely used for residential buildings.

OSB boards (OSB, OSB, oriented strand board) - a material consisting of layers of wood chips bound with synthetic resin. In the inner layers, the chips are located transversely, and in the outer ones - longitudinally. This design is highly durable and reliable. Whether for indoor or outdoor use is determined by the composition of the respective polymer resins and additives.

One of the most demanded areas of OSB use is interior decoration of premises. Oriented strand board can be part of the interior design, along with drywall, chipboard, MDF and similar materials. At a low cost, sheet OSB has a number of advantages over competitors, which greatly contributes to the growth of its popularity.

Varieties

Depending on the technical characteristics there are several classes of OSB boards:

• standard (class 1) - for the assembly of furniture, repair and interior cladding of rooms with normal humidity;
• reinforced (class 2) - for the construction of walls, partitions, floors, ceilings;
• moisture resistant (class 3) - the most common type of OSB. It is used in bathrooms, showers and other rooms with wet processes;
• high strength moisture resistant (class 4), the most expensive type. It can be operated under the influence of significant loads, it is used for interior and exterior decoration of houses (including OSB-4, interfloor ceilings, floors and other critical structures are made).

In addition to the types listed above, there are slabs on sale that are coated on the front side with varnish or laminate. The main area of ​​their use is the production of furniture facades and decorative elements for interior decoration. Especially for covering large surfaces (floors, ceilings, roofs), OSB sheets with profiled tongue-and-groove ends are made. Such materials are joined with a reliable lock, which greatly facilitates the installation process.

The thickness of oriented strand boards is from 8 to 26 mm. To update and interior decoration of existing structures, OSB up to 16 mm is applied. Sheets over 16 mm are used directly for floors, stair treads, walls and roofs. The permissible load per square meter of OSB-3 slab 25 mm with a distance between the bearing supports of 500 mm is about 1 ton.

The main production of the material is concentrated in the USA (brands Georgia, Louisiana), Canada (Norboard) and European countries (Kronospan, Kronopol, Egger). The traditional supplier of OSB to the Russian markets is Latvia (Bolderaja products). Chinese manufacturers are represented in an insignificant range, which is associated with the unstable quality of the product (in particular, non-compliance with sanitary standards limits its use for interior lining). Domestic OSB is manufactured under the Hillman, Kalevala, Kronospan trademarks (the latter is also produced in Belarus and Ukraine).

Features of slabs

One of the most important advantages of OSB is its high strength and reliability in comparison with competitors. The material is attached to any structure without fear of damage at the points of support and suspension. OSB sheets can be part of the load-bearing elements of buildings and structures. Low specific gravity, convenience, ease of fitting and processing provide the ability to independently carry out interior decoration using the usual tools available in every home.

OSB boards have an aesthetic appearance, suitable for covering with transparent and colored varnishes. They can be additionally plastered for wallpapering or painting. The resistance of the panels to water allows them to be used outdoors, in rooms with damp and wet processes. Thanks to the factory impregnation with special OSB compounds, they are reliably protected from damage by insects and rodents. They are not susceptible to attack by fungi and microorganisms, and also do not support combustion.

The disadvantages of oriented strand boards include poor vapor permeability. They are not suitable for finishing the exterior walls of a building from the inside, as they create the effect of a steam room with the formation of condensation on the surface. Sometimes, when heated, OSB boards can emit toxic substances, which is unacceptable for internal lining. As a rule, this refers to low-quality products manufactured in violation of the technology of pressing and impregnating the chip mass. The situation will be corrected in this case by applying paintwork or additional finishing of sheets.

Installation and preparation of OSB

One of the most common applications for OSB boards is the device of internal partitions in the room. The material is easily cut, sawn and drilled, as a result of which it provides a wide field for creativity when shaping the interior decoration of rooms. Installation is carried out by analogy with plasterboard structures: for their fastening, you can use a frame made of wooden slats or from a special metal profile. Fixation is done with self-tapping screws.

To complete the final finishing of the mounted OSB, their surface must be prepared as follows:

1. you need to perform the initial processing of the sheets with sandpaper to remove the wax protective coating;

2. flaws and dents must be leveled with sanding and wood putty;

3. for ends and edges with the highest porosity, preliminary finishing should also be performed (grind, round off and putty);

4. the gaps between the boards are filled with acrylic sealant (this polymer is best suited for further painting);

5. OSB needs to be primed to increase adhesion and reduce the consumption of facing materials. For this, an acrylic or gypsum-based primer is used. Water-soluble surface treatments are not used.

OSB finishes

As finishing wood-based oriented strand board painting is often used. For this purpose, any types of paintwork that are combined with wood are suitable. The coating is applied in several layers. Each subsequent one fits on the previous one after it dries. In some cases, colorless compounds are used: putty and varnish. OSB boards for interior decoration have a rather beautiful texture, which can be slightly emphasized by applying stain.

Smooth and durable sheet surface is an excellent base for wallpapering. Before gluing, OSB must be primed and covered with a layer of putty to prevent the glue from absorbing. The material is also good for plastering. A mesh of polymer or zinc-containing fibers is attached to its plane, which serves as an auxiliary element for fixing special solutions (Henkel Cerersit, Deitermann and others). OSB can also be the basis for the installation of other products: plastic panels, ceramic tiles, mirror mosaics. Suitable for upholstery with fabric, natural or vinyl leather.

OSB boards for interior decoration are an excellent material. It applies to the most different types works: insulation of walls, floors, ceilings, facades, interior wall decoration, furniture production, decorations.

The second name of OSB boards is OSB (oriented strand board). The history of the material is quite short, we can say that it appeared on the market relatively recently. But the material has already gained popularity. Its advantage lies in its practicality and ease of decoration. In addition, it is highly technical and has a low price, since the production technology is very simple, and the raw materials from which OSB boards are made are secondary.

OSB boards are not inferior in their characteristics to chipboard and drywall. Some types of OSB are even superior to them. For example, if there is a need to level the wall, then the chipboard will be much more effective, since it will not bend under the unevenness in the wall, unlike drywall. An excellent partition will also come out of the OSB.

Boards are made from pressed wood chips, which are connected using various adhesives with the addition of boric acid, wax, various resins. Depending on the climatic conditions of the region in which the board will be used, the composition of the adhesive may vary. To ensure the strength, the chips have a different orientation. Most often used aspen shavings.

Varieties of OSB

The material is classified according to its strength. There are 4 types of slabs from the lowest level of strength to the highest:

1. OSB-1. The most common type of product, it has the least strength. It is used for interior wall decoration. Can be used to repair furniture or construct structures required for construction work. This species does not tolerate high humidity.
2. OSB-2. Reinforced type of material that can withstand much more serious stress. Most often used for the construction of partitions. This species is also water sensitive.
3. OSB-3. Analogous to the previous board, but it is waterproof due to the use of other gluing methods. It is suitable for finishing walls in contact with moisture, for example, in the bathroom or in the kitchen.
4. OSB-4. Due to the special form of gluing, more layers and strong pressing, it is the strongest of all types. It is the most resistant to moisture, so it can be used for outdoor use. The material is designed for heavy loads, which allows it to be used in construction. Frequent guest in frame buildings.

The boards can be varnished and laminated depending on the purpose for which they will be used.

Erection of partitions and finishing of the inner surface of the house

OSB is ideal for building partitions in the house. The material is durable, lightweight, cheap, and also provides a huge space for creativity, as it easily changes its shape.

You can fix OSB both on a wooden frame and on a metal profile for drywall. Due to the fact that the slabs are lightweight, the load on the profile will be minimal, and the stiffness of the slabs will allow you to securely fix the structure without fear of fractures and cracks, as is the case with drywall. The slab can be cut easily and with high quality, being confident in its integrity. This will allow you to fit the material to any section of the wall or for the construction of decor.

OSB for interior decoration of the house is very decorative material due to the fact that it is made from natural ingredients. But if there is a desire to make the finishing of the material itself, then almost any substance is suitable here. The main thing is to know not what to decorate, but how to do it correctly. The boards have a smooth surface due to adhesion with the addition of wax, resin and paraffin. The finishing of the slabs begins with priming. Then you can choose any suitable way to arrange the walls. For example:

1. Coating with varnish. Suitable for sections of walls that will come into contact with water. The varnish will provide greater moisture resistance. Before applying, it is necessary to clean the surface from dust and degrease it.
2. Painting. The most commonly used acrylic primer or water-based paint. The second is water-repellent.
3. Putty. It is recommended to add non-woven material to the priming process, otherwise the putty will not adhere to the slippery surface of the walls.
4. Wallpaper. The process of gluing wallpaper is ordinary, you just need to add PVA glue.

Thus, OSB is ideal for any finishing works and does not require any additional effort.

Conclusion

Finishing walls of OSB- not laborious process. The material allows you to use it in any part of the room, you just need to choose the type of plates suitable for a particular room. Plates are easy to cut, which allows them to be adjusted to non-standard sizes. Wall decoration with slabs gives them a presentable appearance due to the naturalness of the material. If a surface coating of the material is required, then this will not be difficult.

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OSB finishing - 4 ways to do it yourself

Greetings. Today I will tell you about OSB boards, as well as about the ways of their decorative and protective finishing. I hope that this topic will be of interest to you, since OSB as a building and finishing material is becoming more widespread.

Basic information about OSB

Oriented strand board OSB is a multi-layer construction and finishing material made from shavings that are glued together with a mixture of natural resins, wax and a number of syntactic additives. High strength of the material is achieved due to the cross arrangement of chips in adjacent layers.

Oriented strand board is not a universal material, since there are four classes of boards on the market with different technical and operational properties. As a rule, boards with the designation OSB 2 are purchased for decoration, while OSB 3, due to its greater moisture resistance, are used for cladding the facade.

Among the advantages of the material, I note the following:

• Durability compared to other particle boards;
• Affordable price in comparison with other categories of sawn timber;
• Attractive appearance even without additional finishing;
• Low weight in comparison with other chip materials.

Are there any disadvantages? Unfortunately, there are, and among them:

• A high degree of formaldehyde emission and, as a result, the harmfulness of OSB board for interior decoration;
• Low vapor permeability and, as a result, the impossibility of using when decorating rooms with a high moisture content in the air.

How serious are the listed disadvantages? The low degree of vapor permeability is easily compensated for by installing a supply and exhaust ventilation system. The situation is much more sad with the release of formaldehydes.

As a result of a long stay in a room decorated with OSB without additional coverage, you risk your health. So can smallpox be used for interior decoration of living quarters? It turns out you can. After all, if properly processed, oriented strand board, they become no more dangerous than sheet plywood.

Let's look at some effective and easy-to-implement methods that you can apply yourself.

Decorative finishing methods

There are many ways to finish oriented strand board. All these methods are based on the application of one or more layers of coating, which, after drying, will create an airtight barrier that prevents the penetration of toxic waste into the external environment. However, in addition to the protective function, the surface finish makes the OSB outwardly more attractive.

Consider what methods of finishing the chipboard you can do yourself.

Method 1 - Finish using wood stain

The instructions for decorating OSB with stain are as follows:

• The stain is soluble in water or solvent;

Since the oriented strand board consists of glued chips, our task is to apply a solution that will not soften or raise the chips. To do this, dilute the stain with acetone. The advantage of this solution is that the coating dries quickly, as the solvent will literally evaporate after application.

• The coating is applied in several layers with a spray gun with a break to dry the previous layer;

• On top of the dried stain, a polyurethane primer is applied, which, after drying, will exclude direct contact of the stain with subsequent layers;
• A layer of patina is applied over the primer;

The patina is applied only over the primer. If applied directly to the stain, the decorative effect will be ruined.

• After the patina has dried, the surface is lightly sanded with the hard side of a dishwashing sponge or scotch-bright;
• The sanded surface is dust-free and then covered with a protective layer of matte or glossy varnish.

This photo shows the result of processing a small fragment of the board material. But nothing prevents from performing such decoration on the surface of an entire wall sheathed with oriented strand board. I am sure that a properly decorated surface will look no worse than textured plaster, which is fashionable today.

Method 2 - Finishing without the use of stain

This instruction is in many ways similar to the previous finishing method, but there are some differences. For example, by eliminating the use of stains, you can simplify and speed up the process of decorative processing.

Let's take a closer look at how this is done.

• On initial stage processing, the plate is sanded with a grinder (grain P180);
• After one pass with a grinder, sweep the dust from the surface to be treated;

• We apply a polyurethane primer to the surface, which will close the gaps between the chips and exclude the release of formaldehydes;

In order to create a barrier to formaldehyde, the coating is applied at least 50 grams of PU soil per 1 m². Drying time of the applied layer before further work is at least 1.5 hours.

• Apply a pigment primer to the surface;
• After the soil has completely dried (at least 2 hours), we grind the surface with grain P320 in one pass;
• We clean the surface from dust and apply a pearlescent dye;

• After an hour, the dye layer is completely dry, which means we can start applying the patina in one layer;

• After the patina has dried, we process the surface with a sponge, removing the dye only along the top;
• The prepared surface is treated with colored acrylic lacquer.

The decorative effect can be different, depending on the choice of tinting materials and depending on the degree of gloss of the varnish. That is why the proposed instructions allow you not only to follow the technology, but also to show imagination when processing particle boards.

Method 3 - Applying liquid wallpaper

If the first two instructions were solely for decorating particle boards, then the following guides will serve more practical purposes. For example, by applying liquid wallpaper, it is possible not only to reduce the emission class of the particle board, but also to extend the service life of the finish made with the use of this material.

I suggest that you familiarize yourself with the photo report on the decoration of the wall sheathed with OSB with liquid wallpaper.

• At the initial stage, the wall was sanded, dust-free and covered with two layers of moisture-resistant acrylic primer with an hour interval for each previous layer to dry;

The use of a primer is necessary not only to increase the hydrophobicity of the board, but also to ensure the adhesion of the surface to the application of liquid wallpaper. If you apply liquid wallpaper directly to the smooth surface of the OSB, there is a chance that they will not stick and peel off.

• After the primer has completely dried, we putty the joints between the plates, using the joint putty, laid on the serpyanka mesh;

In order for the putty to hold firmly on the seams, add to it before applying a small amount of undiluted PVA glue and stir well.

• In addition to the seams, we putty the abutments in the corners, since there probably also are gaps;

• After the putty on the seams has dried, we putty the entire wall with a thin layer without using a reinforcing mesh;

• We prepare liquid wallpaper in accordance with the manufacturer's instructions (ideally, the consistency should be like minced meat);

• Apply wallpaper with a trowel;

• After the applied wallpaper is completely dry, excess material on the site and window openings can be cut with a knife;
• As a result, the wall can be covered with a protective layer of colorless varnish.

Method 4 - Plastering with a leveling putty for subsequent painting

If in the previous instruction the quality of wall alignment was not fundamental, then this instruction will be focused specifically on the high quality of the surface for painting.

• Before processing the OSB for interior decoration, we glue its surface with a masking net;

The paint net can be quickly and easily secured with conventional push pins at the junction of the ceiling and wall. When the main area of ​​the wall has been plastered, the buttons can be removed and plastering can continue.

• Add a small amount of PVA glue to the previously prepared putty and mix thoroughly until a homogeneous consistency;

• We spread the putty with a narrow spatula on a long spatula and begin to apply from the corner to the side;

The alignment technology is simple. We apply the first layer as if by imprinting the solution into the grid so that the cells are visible. Already the second layer will be applied so that the average thickness of the putty is about 2 mm.

• After the first layer of putty is completely dry, apply the second finishing layer;

Attention! Do not determine the degree of dryness of the putty according to the manufacturer's instructions. This parameter depends on many factors, such as temperature and humidity.

It is possible to determine exactly how dry the putty is by the color and the uniformity of the surface. That is, a dry wall should have one color without spots and stripes over the entire surface. If the second coat is applied to the first coat while it is still wet, streaks and stains will show through after painting.

The optimal sanding tool - a paint float

• After applying the second layer of putty, the surface is sanded for maximum leveling;
• At the final stage, dust from the surface is swept away and a primer is applied.

Not sure how to treat OSB for exterior decoration? You can apply this instruction to pre-level the outer surface. On top of the alignment, finishing materials for external finishing works can be applied.

Output

So, I talked about those types of decoration of oriented strand boards that can be applied both inside and outside the building object.

Do you have any questions about the suggested instructions? Ask in your comments, I will definitely answer. I also recommend watching the video in this article.