Plaster on the OSB slabs: the choice of materials and the technique of execution

Slabs of OSB (Oriented Strand Board) can be difficult to plaster because of the peculiar characteristics of the material. Because of its strength and longevity, OSB is frequently used in construction. However, its smooth, non-porous surface makes it difficult for plaster to adhere to. However, you can achieve a long-lasting and attractive finish with the correct materials and technique.

Choosing products that are specifically made to stick to OSB is essential when choosing plastering materials. Conventional plaster is insufficient; instead, seek out specialty primers and bonding agents that provide an appropriate plaster base. These goods give a more stable foundation and improve plaster adhesion.

The method of application holds equal significance to the materials selected. Making sure the OSB is dust- and debris-free and clean is essential for proper surface preparation. Use a premium primer made for wood surfaces, and think about reinforcing the plaster with fiberglass tape or mesh. This increases the finished surface’s overall durability and helps to prevent cracking.

The plaster can be applied after the primer has dried. Apply a base coat first, and let it completely dry before adding more layers. The final appearance will be affected by how smooth and even each layer is, so take your time. Plastering OSB can produce a beautifully finished surface that improves the appearance and feel of any space if done carefully and patiently.

Is it possible to cover the plate plate

One common method of external cladding for oriented-brown plates is plaster in OSB. This wood-based material can swell, darken, and delay in the absence of a protective layer. Its service life will consequently be cut short by multiple times.

Plassing will provide the following benefits, which will help reduce these risks:

  • moisture resistance;
  • mechanical strength;
  • tolerance of temperature changes;
  • vapor permeability;
  • fire safety;
  • Resistance to UV radiation.

Plaster is an extremely good material to decorate OSB with before applying any final coats. Paint, wallpaper, tiles, or stone are the materials most frequently used as interior decor. The OSB stamps’ exterior structures are either plastered or covered in siding.

Plaster finishing will be inexpensive, and the layer that is applied won’t overload the structure. The internal wall or facade will appear more appealing after work, and the working and exiting environments will continue to be cozy.

Difficulties in plastering OSB

OSB panels are great for a variety of tasks. However, due to the fact that this material is made of wood and thus absorbs water well, there are limitations on their use. Plaster that has been applied directly to the stove and has a high moisture content will dry out and crackle. The plaster’s disintegration and crushing are additional factors contributing to the room’s low humidity and temperature.

Among other things, the OSB may begin to "play" when it comes into contact with moisture. This will cause cracks to appear in the material itself and shorten its lifespan. Because the plate is smooth rather than rough, low ASB adhesion with plaster may also be an issue. The issues that have emerged can be resolved in a variety of methods. Depending on the technology selected, this can be accomplished with drywall sheets, insulation, and specialized plaster appliances.

Why are the panels you need to plaster

The tree will defrost in the winter and swell in the summer if the OSB-plate used for street work or inside unheated rooms is saturated with moisture. Strength will be lost, deformation will occur, and the material will seep in.

The chemicals that bind wood to OSB cannot withstand temperature drops below -30 degrees. Plastering the area will form a barrier that will shield the material from harm. The plastering coating also serves the following purposes:

  • strengthening the heat, sound insulation of the building;
  • prevention of drafts;
  • the formation of a monolithic coating without seams, defects;
  • concealment of damage, pits and chips;
  • giving the wall a more aesthetic species;
  • getting rid of the need to make re -repairs for many years;
  • the possibility of staining and changing color at the request of the owners;
  • Relief of washing or dry surface.

Plastering OSB (Oriented Strand Board) can be challenging, but a smooth and long-lasting finish can be achieved by selecting the right materials and applying the right techniques. This post walks you through the process of choosing plaster types and primers that work well with OSB and provides step-by-step instructions for priming, plastering, and finishing a surface. Whether you’re starting from scratch or renovating an existing building, following these pointers will help you get expert results.

What can be used

While not often available for purchase, there are compositions made specifically for plastering OSB stamps. The majority of funds are split into different principles and are regarded as universal.

For instance, the characteristics and particulars of plaster use are:

  • aligning;
  • finish;
  • special: noise -powered, waterproofing, etc.D.

Finish plasters are usually used for cladding because they don’t require plate alignment. Plasting agents can be obtained fully formed or through the dilution of fluids. Furthermore, the composition of construction mixtures can vary; some are meant only for use on internal surfaces, while others can be used in any environment. Plaster’s base, along with its fillers and additives, provide the variation in quality and functions.

Polymer compositions

Plasters on polymer binders: this material is perfect for OSB processing. They are built on polymers with high strength and extended service lives, such as synthetic resins.

Among the group, the most widely used materials are:

  1. Silicone plaster. Very plastic, easily lays down on the surface, resistant to moisture, while vapor permeable. It has antiseptic properties. Implemented in white, as well as in pigmented options.
  2. Silicate plaster. Contains liquid glass, which after solidification provides the coating of a special strength. The plaster is not afraid of water, does not violate the microclimate in the room, and helps to destroy the fungus. The service life of the material is 30-50 years, but its price is quite high.
  3. Acrylic plaster. Made on the basis of acrylic resin, suitable only for internal work. Has less strength than other representatives of polymer compositions. It is easily tinted or stained after solidification, it costs inexpensively.
  4. Silovsanic plaster. It is a modification of the silicone mixture, which is based on Silovsan – silicone with a simplified molecule. Has less pronounced moisture resistance than silicone, is gradually destroying from ultraviolet radiation. The service life of such plasters is 3-5 years.
  5. Polymer -cement plaster. This is an improved cement-sand mixture enriched with polymers. Due to changes in the composition, the material becomes elastic, receives greater strength for bending, shrinkage, gains excellent adhesion with building materials and resistance to abrasion.

You can only purchase environmentally friendly water-based compositions if you plan to process OSB indoors. Plasters with organic solvents are better suited for facade work because of their increased strength and resistance to moisture.

Decorative plaster

The materials in this category are meant to protect OSB stamps as well as add a decorative layer. They have different fillers and are appropriate for both internal and external work. When using focusing and steering plates, the following are the primary types of decorative plasters that can be used:

  1. Structural. Include quartz impurities, small pebbles. When applied to the basis, they allow you to get a rough surface. When lining the OSB in some types of structural plasters, multi -colored spots appear.
  2. Venetian. Contain small marble crumbs. After drying, the base will resemble stone, which looks noble and very beautiful.
  3. Textured. May contain a wide variety of impurities: cellulose, pebbles, mica, silk, pieces of fabric.
  4. Flok. There are three layers of them: basic, flower (with pieces of dried acrylic) and varnish. Are quite expensive, difficult to use.

Mineral plaster

These plasters are made of cement, gypsum, lime, and clay. Their lack of proper plasticity and fear of shock effects make them unsuitable for use with OBS in their pure form. The stove may drop a whole chunk of plaster if you knock against the wall. The layer may fracture due to the building’s vibrations. Gypsum mixtures are extremely sensitive to moisture and should not be used in wet rooms or on streets. Among mineral plasters’ benefits are:

  • vapor permeability;
  • environmental friendliness;
  • strength (with static loads);
  • frost resistance;
  • maintainability;
  • durability;
  • affordable price.

Elastic plaster

Elastic compositions are based on synthetic acrylic resins, just like regular polymer plasters, but they contain a higher percentage of acrylic resin. The material’s high elasticity—its capacity to stretch in the face of deformations, vibrations, and base displacement—is without a doubt its greatest advantage.

These plasters are perfect for newly constructed homes, especially those located in seismic zones.

Positive attributes consist of:

  • moisture protection;
  • strength;
  • environmental friendliness;
  • long service life;
  • High adhesion to OSB;
  • maintainability;
  • simplicity in application, plasticity;
  • Easy to care.

An undeniable drawback of many elastic plasters is that they tend to attract dust and dirt. Furthermore, compared to standard polymer compositions and mineral compositions, the cost of materials is higher.

Options for plastering OSB stamps

Plaster work can be done in a variety of ways, depending on the user’s needs and the OSB-stamp’soperatingconditions.

The traditional method of plaster

This method is less common since it doesn’t require the use of insulation. A membrane vapor barrier, a reinforcement grid, double-sided tape, primer, plaster, and adhesive composition must be ready for use. Among the tools needed are a roller, spatulas, graters, and construction staplers.

The following will be the work order:

  1. Cut a piece of vapor barrier of the desired size, fixed using a stapler to the OSB plate (at the joints, a 10 cm overlap is made).
  2. Glue the boundaries and seams between the slabs by double -sided tape.
  3. They put a reinforcing net on adhesive tape.
  4. Knead building glue according to the instructions, apply to the surface of the mesh in 1-2 layers.
  5. After drying, the coating is treated with a primer using a comfortable roller.
  6. Apply plaster on the grid using spatulas and leveling the layer with graters.

It makes sense to use elastic mixtures with this plastering technique so that OSB seam displacements won’t cause cracks. In the event that contemporary vapor barrier material is not available, bitumen cardboard or even standard roofing material can be substituted.

Plaster with insulation

They most frequently use leaf foam (40 mm) as a heater. The processing of interior spaces in cold rooms or exterior walls is appropriate for this technology. The steps that will be taken are as follows:

  1. On a clean, primed and dried surface of the OSB stamp, gluing sheets of insulation.
  2. After drying the glue in the center and corners, the foam is fixed with dowels, deepening the hats well.
  3. In order to avoid the formation of the “cold bridges”, the joints of the foam sheets are closed with mounting foam, after drying it is cut off.
  4. Apply building glue (a layer of 3 mm), a reinforcing fiberglass grid is laid on top, lining it to the composition with a spatula.
  5. Spended glue is aligned with a spatula.
  6. As they dry, the glue layer is plastered.

Plaster work should never be done in an environment where the street temperature is higher than +5 to +35 degrees and there is wind or extreme cold. The same restrictions on temperature and humidity should apply to the premises: neither should be higher than 65%.

Using drywall

Generally, "OSB + drywall" is used to both seriously reduce noise levels and warm buildings. First, screws are used to secure the oriented stove to the guides.Afterwards, fresh screws are used to install the drywall sheets on the same guides. An alternative would be to adhere GKL to the OSB and use self-tapping screws to secure the structure.

In order to prevent the appearance of "cold bridges," the joints between the materials must not match. When the fasteners are finished, drywall is installed using putty that has been mixed properly. You can skip the vapor barrier during the dry stage, but it is installed in the wet rooms beneath the GCL.

Features of the plaster indoors and out

Though there are some variations, the technology used to work with OSB stamps from the outside and inside of buildings is generally the same. The type of work must be considered when selecting a plaster; for street use, frost-resistant material with enhanced moisture and UV resistance should be purchased.

Plastering a facade should only be done on a calm, dry day. Polyethylene reliably closes the wall in the event of unexpected precipitation. The work is stopped when the temperature rises by more than +35 degrees.

The working environment is more comfortable on the premises. Making sure there are no drafts and appropriate humidity levels is crucial.

Fans, heaters, and heat guns cannot be used to dry plaster on OSB in the home as this will cause cracks. It is crucial to de-energize the wiring completely before beginning the plastering process.

Topic Details
Material Choice Use a primer designed for OSB boards to improve adhesion. Choose a flexible plaster that can handle the natural movement of the wood.
Surface Preparation Clean the OSB surface thoroughly. Ensure it is dry and free of dust and grease before applying any materials.
Primer Application Apply a coat of primer evenly over the OSB surface. Allow it to dry completely as per the manufacturer"s instructions.
Plaster Application Spread the plaster using a trowel. Apply in thin, even layers to avoid cracks and ensure proper bonding.
Finishing Once the plaster is dry, sand the surface lightly to achieve a smooth finish. Apply paint or other finishing coats as desired.

Plastering over OSB (Oriented Strand Board) can be difficult, but it is completely doable with the correct tools and methods. Selecting appropriate materials is an essential first step. To guarantee correct plaster adhesion, use a premium primer made especially for OSB surfaces. This is an important step because the composition and texture of OSB can make it harder to bond with regular plasters.

The next crucial step is choosing the right plaster after using a suitable primer to prepare the surface. Seek for plasters that are robust and flexible, as these will allow for the OSB’s normal movements. Plaster that has been reinforced—possibly with fiberglass mesh—can offer more stability and lower the chance of cracking over time.

The application method is just as crucial. Apply a thin, even layer of plaster first, and wait for it to solidify before adding more layers. This multi-layered strategy aids in creating a strong, seamless finish. In order to guarantee that each layer adheres correctly, pay attention to the curing times in between. A more polished and long-lasting finish can be achieved with plaster that has been mixed properly, applied carefully, and free of lumps.

Lastly, think about the surroundings in which the plastered OSB will be utilized. To withstand weather, different plaster types or extra protective coatings may be needed for indoor and outdoor applications. Your plastered OSB surface’s longevity and appearance can be improved with proper sealing and finishing.

OSB slabs can have a long-lasting, attractive finish if the plaster is applied precisely and the materials are chosen carefully. In the end, this process will produce a dependable and appealing surface appropriate for a range of applications, despite the need for patience and accuracy.

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Daria Yakovlev

Interior designer, author of online color design courses. I will help you create a harmonious interior using color.

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