Today, frame house construction using OSB boards and SIP panels is very popular. These materials, like any other natural origin, need a protective finish.
The outside of such houses is most often faced with curtain walls. facade systems, and putty on OSB boards is used inside for subsequent decorative finishing - wallpapering or painting. In this article we will talk about the technology of this process and the materials that can be used.

OSB boards are a multilayer material made from wood chips glued together under the influence of high pressure and temperature of synthetic resin. Each layer has a different orientation, which makes the slab very resistant to deformation.

Despite the high content of artificial substances, 80-90% of the slabs are made of wood, therefore they have many properties natural material. One of them is the ability to absorb moisture.
It is this that raises doubts about whether it is possible to putty on an OSB board, glue wallpaper on it (see Finishing walls with wallpaper in the correct design) or coat it with introduction-dispersion paints. After all, both paint and wallpaper glue, and putty can lead to swelling of the material, an increase in its size and deformation.

Note. Oriented- particle boards Available in varying degrees of moisture resistance. The most reliable ones are sold with the OSP-3 marking. They are used for external cladding and in rooms with high humidity.

Many developers are quite satisfied with the natural look of the material, especially if we're talking about O country house or utility room, so they are content to simply coat the surface with varnish.
But what if you need it? decorative finishing? Is it possible to putty OSB (see Finishing walls with OSB boards and roofing work), what mixtures to use and how to do it correctly?
The answer to the first question is clear: you can. It is simply advisable to use the mixtures not on water based to avoid deformation of the sheets.

Features of OSB finishing

Let's look at the technology of puttying slabs and outline the range of materials that can be used for this.

Selection of putty and other materials

Before you putty the OSB board, the surface must be prepared: sanded to eliminate defects and primed.

Advice. It is easier to use slabs that have already been sanded in production. Their price is not much higher, and it takes much less time and effort to finish.

The question immediately arises about the primer - which one to choose. Of course, the one that is intended for wooden surfaces(see Priming wood - process features) and does not contain water. For example, drying oil or primer based on glyphthalic varnish.

Advice. The ends of the slabs have the greatest moisture absorption capacity. It is advisable to treat them with a protective primer before installing the sheets, since this will be impossible to do later.

Let's move on to choosing the main material. You need to choose from those compositions that are intended for finishing wooden bases and have an oil, adhesive, synthetic base. Mixes for brick or concrete most likely will not last long on your surface.
The most suitable are the following formulations, sold in ready-to-use form:

• A special acrylic putty for OSB boards, also intended for leveling any wooden and particle board substrates.

• Nitro putty ASh-24, ASh-32, MBSh. They are made from resins and cellulose ethers with various fillers and plasticizing additives. To achieve the desired consistency, they can be diluted with solvents.
• Oil-adhesive putties are compositions based on drying oil, varnishes and glue with the addition of chalk, thickeners, and modifying additives. Diluted with drying oil.

Also, special paints with fillers are used for finishing OSB.
Regardless of the composition, putty for OSB boards must have the following properties:

• Good adhesion to smooth, resin-coated substrate surfaces;
• Low degree of shrinkage when drying with a low probability of cracking;
• High strength created coverage and its suitability for subsequent decorative finishing;
• No solid fillers in the mixture, homogeneous consistency.

To avoid the appearance of cracks when finishing oriented strand boards, experts recommend reinforcing them with elastic materials. The best option– painting (repair) non-woven fabric.

To stick it, you will need glue for the corresponding wall coverings.

Putty technology

All necessary materials have been selected and purchased, you can start working.
There is no difference in how to putty OSB for wallpaper or for painting, the procedure is the same:

• The first step is to apply a primer with sealing properties, which creates a film on the surface. It will protect subsequent coatings from emerging resin stains, essential oils and tannins contained in wood.

• Further, the instructions require a technological break in work to dry the surface. Its duration depends on the type of primer and can range from 4 to 12 hours.
• The second step is the direct application of putty. Work is performed only at positive air temperatures and humidity not exceeding 60%.
  How this is done can be studied in detail by watching the video in this article or reading other articles on the site dedicated to puttying walls and ceilings.

• The second technological break is arranged to dry the putty layer.
• The third step is grinding the surface to eliminate minor defects and make it smooth.
• The fourth step is reinforcement. The interlining is glued overlapping, but in order to ensure that there are no thickenings at the joints, a double cut is made along the ruler in this place, excess material is removed, and adjacent sheets are fixed end-to-end.

Judging by the description, the process is simple and you can do it yourself. However, theoretical knowledge alone is not enough to finish such a capricious material, so if you have no experience in such work, it is better to use the services of a professional.

Conclusion

We tried to most fully and comprehensively answer the question of how to putty OSB and what materials to use for this. This is not necessary if you do not plan to hide the structure of the material, but such a finish is needed under paint or wallpaper - it will protect the base from moisture and allow you to create a high-quality decorative coating.

With the widespread use of oriented strand panels (OSB) in residential construction, the question arose whether it was possible to plaster OSB boards. A wood base bonded with resins is not suitable for conventional mixtures based on cement, lime or gypsum.

Polymer-based pox board plaster

With the advent of plaster compositions on polymer based With high adhesion to wood, the problem of how to plaster OSB on the outside has lost its relevance. Effortless elastic mixture thin layer lies on the base of the slab, tightens minor irregularities. A kind of rubber shell is formed, resistant to mechanical and atmospheric influences.

Suitable for indoor and exterior finishing. Tinted with acrylic dyes. Technical requirements standardized:

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

Plastering on OSB with elastic putty is performed in the following sequence:

• The plate is cleaned with coarse sandpaper. This removes protruding wood fibers that have weak connection with base;
• to increase adhesion, the cleaned surface is primed with an appropriate agent;
• after the soil dries acrylic sealant fill the unevenness and smooth it with a spatula soaked in a soapy solution. This will protect the instrument from sticking of the composition;
• The composition is applied to the prepared surface and leveled to obtain a layer up to 5 mm thick. The maximum thickness of plaster on the OSB board is applied to the façade, insulating the room from cold and moisture leaks. For decorative finishing interior walls 1.5 - 2 mm is enough.

OSB is especially practical with the use of decorative polymer compositions:

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

The high cost of composite structures forces the developer to look for alternative options. Plastering OSB boards on the outside is possible using oil-adhesive mixtures and nitro putties.

Alternative to elastic plaster

The most widely used is oil-adhesive putty. Available in prepared or concentrated form. Derivative mixtures:

• drying oil or Oil paint- binding component of the composition;
• CMC glue forms a strong connection between the plaster and the OSB board;
• chalk as mineral filler;
• driers to speed up the drying of drying oil;
• plasticizers soften the composition, making it easier to apply and level the putty;
• water is added in small quantities to prevent the mixture from drying out during storage.

Nitro putties are applied in a thin layer. Used to treat minor damage or decorative purposes. They have a pungent odor. Work is carried out in well-ventilated areas. Solvents act as a base. Fillers: red lead, koalin, zinc white. Required finishing touches surfaces: painting or wallpapering.

There is another way to apply plaster to the surface of an oriented strand board: glue to the surface thin sheets polyurethane foam and plastered with mixtures based on cement, lime or gypsum.

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

Is it possible to plaster OSB

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

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

The most commonly used types of finishes are:

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

Types of OSB board finishes

Properties that must have protective covering for OSB:

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

Why do OSB panels need to be plastered?

Plaster has all of the above properties.

Plaster coating also:

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

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

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

What plaster is used for OSB boards

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

Layer cake pattern

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

Plaster mixtures are divided into types:

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

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

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

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

Mineral

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

Binding components are polymers.

Basics of two types:

• water soluble;
• soluble in organic diluents.

The prices of the trains are higher than the prices for mineral mixtures.

Decorative

Specially formulated mixtures for decorative work.

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

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

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

Methods for plastering OSB boards

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

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

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

• without insulation;
• with insulation.

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

Traditional way

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

For plastering you will need:

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

Sequence of work:

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

Scheme of the standard method of plastering using OSB

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

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

puttying OSB under plaster

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

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

Insulation and plastering

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

Subsequence:

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

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

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

Using drywall

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

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

Features of plastering indoors and on the façade of a building

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

Indoor conditions are more comfortable. Here great importance humidity plays a role (no more than 65%), absence of drafts. Use fans and heaters to speed up the drying process plaster solutions it is forbidden. Violation of the conditions will lead to the appearance of cracks. Before plastering, de-energize the electrical wiring.

Tool

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

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

OSB surface preparation

OS boards may be dusty and dirty. It is necessary to sand the surface, remove dust and dirt stains. Because wash wood material no, they are used for cleansing special means in organic solvents, for example, white spirit. The seams are sealed (the sealant for OSB is elastic, since the slab must have an expansion gap on the sides), primed and puttied to obtain a flat surface.

Sealing seams between slabs with sealant

Step-by-step plastering technology

Plaster on OSB board on the facade in sequence:

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

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

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

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

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

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

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

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

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

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

Traditional way

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

IN preparatory stage includes:

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

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

The solution is applied in a thin layer of 1.5 to 5 mm. Therefore, this process is reminiscent of applying putty. Such OSB plaster slabs require time and Money. But, once everything is done efficiently, the owner can forget about repair work for a long time.

Insulation and plastering

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

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

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

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

Polymer compositions for plastering

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

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

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

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

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

Today, OSB boards are widely used in construction and interior decoration. The OSB board itself is a panel with dimensions of 2.5 × 1.2 m, which is made from compressed wood chips and has good performance, such as strength, ease of processing, resistance to mechanical damage.

OSB also has high sound and heat insulation. However, when the time comes finishing premises, many novice builders are wondering: How to properly putty OSB. After all, every OSB board covered with wax that preserves quality characteristics material, and the putty simply won’t work on such a coating. How can one be, the material is so praised, but as a result, some ridiculous problems appear in the simplest finishing.

In this article, we will look in detail at how to properly putty OSB boards with your own hands, using quite simple diagram. Moreover, it doesn’t matter at all what needs to be puttied, the wall or the ceiling.
So, below is a wall covered with OSB, on the left before finishing, on the right - puttied, which is ready for painting or wallpapering.

Some builders, before starting to putty OSB, prefer to first sand the entire surface, thereby removing the wax layer and making the surface rough. True, this method will take a lot of time, and there will be a lot of dust, especially if you use a power tool. Others choose a simpler and no less reliable way– treating the OSB surface with a special primer and using mesh during the puttying process. Moreover, both methods incur approximately the same costs for tools and materials, but differ greatly in the time spent on work.

Selecting the necessary material and tools

In order for the putty to adhere well to smooth OSB, its surface must be prepared. To do this, we purchase at any hardware store a primer called “Concrete Contact” and a small brush, or a roller. After applying the primer, a rough layer forms on the smooth OSB surface. This surface, as a result, allows the putty to adhere well to the base.

Now you can start next stage OSB surface preparation. In order for the putty to stay on the wall not only firmly, but also for a long time, it is advisable to reinforce it. Therefore, when buying soil, be sure to take a plaster mesh with you. Almost all plaster meshes, as a rule, are made of either metal or polymer materials and have different sizes cells. Of course, to reinforce a thick layer of putty or plaster, it is advisable to use metal mesh, but, for finishing interior walls rooms made of OSB, it is enough to use fiberglass (or glass-fabric) mesh with a cell size of 5x5 mm. The main advantages of using such a grid:

- relatively low cost;
- simple material to use;
— improves the strength of the coating;
— prevents the appearance of cracks during shrinkage of the putty.

How to putty OSB

- creates a fairly durable and elastic coating;
— does not crumble or crack when drying;
— the finished surface can practically not be sanded;
- quick-drying material.


However, such putty is much more expensive than regular putty, but you can live with this, since the cost of purchasing it is easily offset by the quality and speed of work. To apply the putty, you will need two metal spatulas, one wide 20-30 cm, the second narrower 10-15 cm. We will apply the first spatula layer by layer, and the second we will work in the corners and hard to reach places, and also scoop the putty from the bucket.

Preparing the surface
If desired, for greater confidence, you can lightly sand the OSB panels with coarse sandpaper on critical areas of the walls, for example in corners or near doors and window openings. The primer is applied to the wall with a regular brush or roller in 2-3 layers with an interval of 20-30 minutes. After applying the last layer, it is necessary to allow the primer to completely absorb and dry, for which 3-4 hours is enough. Then we take the plaster mesh and cut it into strips with a length equal to the height of the ceiling. The mesh is applied in one layer over the entire wall area. It is recommended to place each adjacent mesh with a slight overlap of 2-10 cm - as glued before wallpaper. Attach the mesh to the wall with a stapler, screws or glue. It is not at all necessary to glue it over the entire area, just “smear” it with putty and it will easily stick to the rough surface of the OSB. It is better to start laying the mesh from the corner of the room.




Having glued the plaster mesh to the wall behind it top part, we begin to putty. We work only within the mesh strip, leaving small margins from the edges to overlap the edge of the next mesh. The first layer of putty should only attach and smooth out the mesh, so you shouldn't sculpt a lot at once. Consistency and accuracy are important here. We carry out putty according to standard rules puttying. We scoop up the putty with a small spatula and put it on a large one, with which we spread it on the wall. The direction of applying the putty itself does not matter, the main thing is that the surface is as smooth as possible. To avoid sagging and unevenness, try to hold the spatula correctly while working. Start spreading the putty on the wall, holding the spatula at an angle of 45-60 degrees to the surface, and finish the putty by gradually reducing the angle to 15-30 degrees.




It will be easier to putty an OSB wall with a mesh if you gradually move from the ceiling to the floor. This way we will gradually smooth out and evenly cover the entire plaster mesh. In total, the putty is applied to the OSB panel in 2-3 layers with a thickness of 1-2 mm. After applying each layer, you need to let the coating dry for 30-60 minutes. The first layer can be made 1 mm thick - just to attach and smooth the mesh. The second layer should cover the plaster mesh. The last layer We level the almost finished surface.



Finishing the putty
We finish the puttying, leveling out all the unevenness, using only a large spatula. The plaster mesh may be slightly translucent, but in no case should it protrude or be flush. If, after the putty has dried, the mesh still appears, you need to add another layer of putty. Ideally plaster mesh should be 2-3 mm from the surface of the finishing layer of putty. Trying to apply the putty carefully and evenly, layer by layer. If you don't rush, you may end up not having to sand the finished surface.



We count the consumption of materials
Before you buy primer, putty, brushes and a whole set of spatulas in the store, you need to decide how much and what to buy. After all, although the remaining extra can of putty will be useful on the farm, you will still spend a certain amount of money on it, which could be used to buy the missing can of soil. Therefore, it is better to calculate, at least approximately, how many materials will be needed. Here is the approximate consumption building materials for puttying OSB panels.