With the massive use of oriented strand board in housing (), the question arose whether it was possible to plaster OSB slabs. The resin bonded wood base is not suitable for conventional cement, lime or gypsum mixes.
Polymer-based smallpox plaster
With the advent of polymer-based plastering compounds with high adhesion to wood, the problem of how to plaster OSB outside has lost its relevance. The elastic mixture effortlessly lays down on the base of the board in a thin layer, tightening up minor irregularities. A semblance of a rubber sheath is formed, resistant to mechanical and weathering.
Suitable for interior and exterior decoration. Tinted with acrylic dyes. Technical requirements are standardized:
- withstands 10% linear tension (compression) per square meter of coverage;
- 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 quality loss;
- 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 a weak connection with the base;
- to increase adhesion, the cleaned surface is primed with a suitable agent;
- after the soil has dried, the irregularities are filled with acrylic sealant and smoothed with a spatula soaked in soapy water. This will keep the instrument from sticking to the composition;
- the composition is applied to the prepared surface and leveled to obtain a layer up to 5 mm thick. Plastering on the OSB slab on the facade is applied to the maximum thickness, isolating the room from cold and moisture leaks. For decorative finishing of interior walls, 1.5 - 2 mm is enough.
From osb it is especially practical with the use of decorative polymer compounds:
- bright colors will decorate any facade;
- color for the entire thickness of the layer will hide the damage to the surface;
- the building will receive additional external protection.
The high cost of composite compounds forces the developer to look for alternative options. Outside plastering of OSB boards is possible with the use of oil-glue mixtures and nitro-fillers.
Alternative to elastic plaster
The most widespread is oil-glue putty. Supplied ready-made or concentrated. Derivative mixtures:
- drying oil or oil paint - a binder component of the composition;
- KMC glue forms a strong connection of the plaster with the osb board;
- chalk as a mineral filler;
- driers to accelerate drying of drying oil;
- plasticizers soften the composition, facilitate the application and leveling of the putty;
- water is added in small amounts to prevent the mixture from drying out during storage.
Nitro putty is applied in a thin layer. Used for minor damage or decorative purposes. They have a pungent odor. Work is carried out in well-ventilated areas. Solvents are used as a basis. Fillers: iron red lead, koalin, zinc white. Surface finishing is required: painting or wallpapering.
There is another way of applying plaster to the surface of an oriented strand board: thin sheets of polyurethane foam are glued to the surface and plastered with mixtures on a cement, lime or gypsum base.
The subject of numerous discussions of those who build houses or make repairs with their own hands was the question of whether it is possible to plaster OSB slabs without spending additional materials and efforts for this.
Plaster is a great way to improve and strengthen residential buildings erected using frame technology, to equip and insulate walls.
Expensive building materials can be successfully replaced with OSB wood boards. The practice of using them for external walls is widespread.
The popularity of the use of OSB boards
OSB is a popular material in the construction of frame houses OSB slabs for exterior decoration of the facade and living quarters are a great alternative, affordable and affordable. Every type of building and every building material has positive and negative sides.
The lightness and thermal insulation properties of boards made from layers of wood shavings is an indisputable advantage, but, according to builders, such walls require additional decorative finishing.
Detailed information on each type of waterproofing layer should be carefully studied. It is advisable to consult with specialists. Sometimes savings on building materials today translate into significant expenses in a short time.
When working with OSB boards, you must first of all remember that more than 90% of these products consist of wood. Therefore, high-quality finishing of OSB boards is associated with the use of materials typical for working with solid wood surfaces.
Plates lend themselves to almost any finish: they can be glued, painted, putty, varnished and even, subject to certain rules, plaster. All processing methods have their own characteristics, so each should be disassembled separately.Painting the slab
A material such as OSB can be painted with water-based or oil compositions applied with a brush, spray gun or roller.
The question often arises, is it possible to paint the OSB slab with water-based compositions? It is possible, but at the same time the shape of the leaf will slightly increase (swelling is possible), therefore it is highly desirable to use it. Painting on one side only may cause the panel to bend slightly. Therefore, it is worth treating the board with water-based paints in the case when the appearance is not important. In opposite situations, it is necessary to use oil formulations. What are the features?
1. Any paint tends to spread at sharp corners... Therefore, before the start of staining, they must be rounded off by means of light grinding (with a radius of at least 3 mm). This is especially important for OSB used for outdoor decoration.
When treating outdoor boards, use paints intended for outdoor use. In this case, the manufacturer's recommendations for painting wooden surfaces should be followed.
2. Edges. Their surface is more porous than the plane of the slab. The result is greater absorption, i.e. moisture absorption. Therefore, special attention should be paid to edge sealing. Moreover, this operation must be carried out before priming and applying the base coat.
3. Padding... If you decide to treat the slabs with an antiseptic, fire retardant impregnations, then you should carefully read the instructions - some of these chemicals may contain an increased alkali content, which will require the use of a special primer.
4. Layers of paint... The opinion that the thicker the layer, the better it will protect the surface, is not entirely true. It is better to apply several thin coats than one thick one. In this case, each layer must be thoroughly dried.
- the edges must be processed before starting the assembly of the structure (rounded and sealed);
- if water-based sealants are used, then in the future, due to swelling, compulsory grinding will be required. Therefore, it is better to use solvent-based formulations (for initial processing);
- when using transparent dyes, it is necessary to use those that prevent the penetration of ultraviolet rays (i.e., inhibitors must be present in the composition of such materials);
- the boards must be fixed in such a way that potential areas of moisture accumulation cannot arise;
- it is necessary to cover both sides with dye equally;
- 45 degree end connection is not recommended (due to sharp edges). If the finish provides that the edges will be visible after completion of the work, then they must be filled with cellulose (wood) aggregate, and then sanded and primed.
Putty and varnishing
The design of the OSB board itself, its texture are decorative and look attractive in aesthetic terms. The use of a colorless putty or varnish will only emphasize the naturalness of the surface. But do not forget about the "tendency" of the material to swell.
So is it possible to putty OSB? It is possible if oil-based formulations are used. A good effect is given by the use of a putty when applied to a floor covering made of slabs. The surface is glossy and sufficiently protected from mechanical stress.
Any special OSB putty or varnish does not exist. The usual compound used for wood surfaces will work. If it is necessary to use them, it is better to use special plates that have already been sanded by the manufacturer - such panels do not need preliminary preparation. Sanded boards can also be used for film coating or lamination.
If you use drywall for home decoration, we advise you to read the article about.
Pasting wallpaper on OSB
The traditional approach is no longer suitable here. The board is highly absorbent. Therefore, you cannot just stick the wallpaper using glue containing water in its composition - the plate will begin to swell, the wallpaper will simply fall off.
In order for the wallpaper to reliably adhere to the OSB surface, a number of preparatory measures must be taken.
First, a coat of primer must be applied to the panel. After its complete (complete!) Drying, any dispersion putty based on synthetic resin is applied. Drying time should not be less than 12 hours.
And the final preparatory step is gluing an elastic material for reinforcement. Only compliance with the above rules will allow the pasted wallpaper to stay on the OSB surface.
Plastering OSB boards
Very often, OSB slabs are in demand during construction - they are used to upholster the supporting frame. One of the ways to protect it in this case is plastering. However, here again the problem of absorption arises, and the question "is it possible to plaster osb" is quite pertinent.
The process of plastering slabs has its own characteristics. These include, first of all, the preliminary fastening to the surface of the bituminized cardboard. It is also possible to use roofing material with a paper base or facing kraft paper.
The next step is to fix the galvanized plaster mesh. The resulting structure is poured with a special adhesive (the lattice should be completely immersed in it). Any special plaster on the OSB board is not required. The only requirement is that it must be vapor-permeable and polymer-acrylic.
Gluing elements on OSB
If necessary, various decorative elements can be glued to the OSB board for interior decoration. For outdoor use, bonding may be necessary, for example on a roof. Usually, several types of glue are used, depending on the place of application and the required strength of the joints:
- thermoplastics: for work in dry conditions (the items to be glued must be fixed);
- thermal hardening compositions: serve as structural, i.e. load bearing, glue (harden when heated, but there are compounds that harden at room temperature);
- urea-formaldehyde, melamine-formaldehyde: have limited resistance to weathering. It is better to apply in a place protected from precipitation or indoors;
- elastomers: they include 2 components (binder, glue itself), used for gluing thick parts (quickly sets, no pre-fixing is required);
- on a bituminous basis: more often used for fixations when arranging a roof.
Oriented strand board (OSB), aka OSB (OSB or OSBI) is perfect for construction. These slabs are increasingly used in housing construction. This is especially true for the construction of frame houses. They are used both for cladding facades from the outside, and for arranging the interior space inside. Therefore, the question of which method to prefer for interior decoration is relevant for every home owner.
The main types of interior decoration
As a decoration for interiors, the walls of which are folded from OSB, you can use different methods. The choice is always up to the owners. A short list of finishing works that are suitable for OSB is given below:
- wallpapering
- painting
- varnishing
- decorative putty and decorative plaster
- gluing tiles or ceramic tiles
All of these finishes have one thing in common. The OSB surface must be properly prepared before the topcoat is applied.
The weak point of oriented strand boards is essentially only one. It is the ability to absorb and gradually accumulate moisture. Over time, the entire slab or part of it swells and deforms. Therefore, the OSB surface must be isolated from the effects of high humidity. And here many people have a question whether it is better to putty the walls from OSB or cover them with a layer of plaster?
Initially, the plastering process is used to seal the joints between the slabs and to level the walls. This layer serves as the basis for applying paint, wallpapering partitions and, oddly enough, for the finishing layer of plaster. So the conclusion suggests itself quite definite: putty is an element of rough finishing of premises.
So it is quite possible to plaster the interior walls from OSB. This, along with others, is a fairly common finishing method that designers often use. It should be added that the use of a conventional sand-cement mixture in this case is not recommended. There are special types of plaster that are intended for interior work with OSB panels.
What plaster is used for indoor OSB
Plaster, in this case, is used to create the last layer, which largely determines the design of the premises. These mixtures are called decorative plaster. For wooden surfaces, it is recommended to use compounds that have high adhesion. We are talking about polymer-based plaster mixes. A layer of such plaster "breathes" and prevents the formation of fungi and mold. The plaster layer significantly reduces sound transmission and heat retention. It is environmentally friendly and absolutely safe. The wall covered with plaster looks absolutely uniform. Joints between slabs and other defects are hidden. Such a coating will last more than twenty-five years.
Plaster mixes are sold ready-made or dry. Dry varieties should be diluted with water or another reagent before application, according to the instructions. It is very important to make sure that the OSB boards are rigidly fixed and not subject to movement. Only then can you start working. Otherwise, the plaster may crack and flake off in places.
Decorative OSB plaster indoors. Types, characteristics.
Decorative plaster can be classified according to two parameters: by the composition of the filler and by the type of binding components. By the type of filler, one can distinguish Venetian, structural, textured and flock.
Venetian plaster when applied, it is capable of forming a smooth surface. It contains an admixture of the smallest marble chips. This gives the surface a mirror finish.
Structural blend has small admixtures of quartz and other components. The surface is rough. Its main difference is that when applied to a wall, multi-colored spots appear on it.
Textured plaster can be of various forms and include impurities of any suitable material. These can be small stones, pieces of mica, fibers of silk or other fabric. Wall panels covered with this mixture have a pronounced texture, which is determined by the filler.
The hardest to work seems to be flock mix... But it is very winning in design. The fact is that it consists of three layers - the main one, a layer with flocks and a varnish coating. Pieces of dried acrylic paint are used as flocks.
Types of decorative plaster for indoor OSB by composition
According to the presence of different binding components in the mixture, textured plaster can be divided into the following types:
- mineral
- acrylic
- silicone
- silicate
V mineral plaster cement acts as a binder. It is not very suitable for OSB, since it is afraid of shock when hardened. Although the finished layer only gets stronger over time, it lacks a certain amount of plasticity. In case of accidental impact from the wall, a piece of the covering may come off.
Acrylic plaster made on the basis of acrylic resin. Compared to the previous mixture, it has a lower strength and durability. Has a variety of colors. You can color the mixture yourself by adding a special colored paste. It is quite suitable for application to the surface prepared by OSB.
Synthetic resins serve as a binder for silicone decorative plaster... It is very flexible and can be easily applied to the wall. Silicone plaster is resistant to moisture, vapor permeable and has an antiseptic effect. There are many colors available. This type of textured plaster fits perfectly into the solution of the task.
Silicate plaster It stands out in that liquid glass is used to create an astringent effect. The hardened surface has increased strength, moisture resistance, vapor permeability and antifungal effect. Such plaster will last a long time, up to fifty years or more. This option can also be used to work with OSB.
Relief of textured plaster for OSB in the house
According to the shape of the surface relief, the most famous types of textured plaster are: "lamb", "bark beetle" and "fur coat".
"Lamb" has a fine-grained structure, due to the filler of small untreated stones.
Plastered surface "Lamb".
"Bark beetle" resembles a tree that has been attacked by bark beetles.
Plastered surface "Bark beetle"
"Fur coat" has a smoother surface compared to the first option, since the filler in this case is cement.
Plastered surface "Fur coat"
Surface preparation OSB
As already mentioned, interior decoration of walls and ceilings from OSB sheets takes place in two stages. The first, rough, includes the preparation of the facade of the slabs for the finishing coat. The second, final, consists in applying plaster to the prepared base.
Surface preparation begins with sealing the joints between the slabs. For this, it is advisable to use acrylic or silicone sealant... After completing this operation, it is recommended to get rid of all visible irregularities and defects using a grinder. If this is not possible, then you can walk along the walls with ordinary sandpaper.
Sealing the joints with a sealant.
The walls should be cleaned of dust with a vacuum cleaner. For ceilings, all processes are similar. If necessary, wipe the surface with white spirit. The first coat of primer is then applied. Best applied acrylic primer with additives that improve its properties ... Primers of the adhesive class have also proven themselves well. They contain fine quartz aggregates, which help to keep the putty on the walls. After the first layer of soil has completely solidified, the operation should be repeated.
The next step is to putty the walls. There are specially designed mixtures for OSB panels. It is better to use adhesive-based putty compounds. Before applying the composition, a special metal or plastic mesh is attached to the walls, which contributes to a better adhesion of the putty. Fastening is easiest to do with a construction stapler. Then the first layer of putty is applied. The mesh should be completely hidden under the mixture. To create a perfectly flat surface, you can putty the wall a second time when the first layer is dry.
The next two videos illustrate the preparation process.
More details about the intricacies of the choice of putty, preparation of the base and puttying can be found in a separate article:.
After that, you can come up with a decorative coating, be it wallpaper, paint or decorative plaster.
Indoor decorative plastering
The selected mixture is prepared in the same way as it is written on the package. Work is not much different from puttying. However, it takes some skill to get the wall surface to look as intended.
A flat trowel is used to apply the mixture, as shown in the figure. The plaster is carefully applied in several layers. The layer thickness is small, within one and a half to five millimeters. As a rule, two or three coats are sufficient. It is very important to ensure that before applying the next layer, the previous one has dried and gained strength.
Plastering the prepared surface
This is the basic scheme of work on plastering internal surfaces from OSB. It should be noted that each type of decorative plaster has its own nuances when applied. This type of finish is relatively inexpensive. And if everything is done correctly, the resulting interior will satisfy the most demanding taste and will last for many years.
An example of Venetian plaster with a picture.
When building a house, you often have to think about saving money, or preserving construction for a certain period. Plastering the facades of a frame house can be one of these ways of saving or taking a break to accumulate funds.
Plastering the facades of wooden houses in our country became widespread after the fire of 1812, and was often used until the beginning of the 20th century. Then this method of facade decoration was practically forgotten. But in the USA, it was used until the 70s of the last century, until plastic siding appeared on the construction market.
Today there are two ways to apply the plaster mixture to the facade of the house. The first, the most common, is that the outer walls of the house are pasted over with sheets of foam plastic and a plaster mixture is already applied to them. At the same time, the thermal insulation and energy-saving characteristics of the house are improved.
Step 1. We go through all the joints of the OSB sheets with a frost-resistant sealant, put a self-adhesive "serpyanka" over the seams, and putty.
Step 2. We ground all the walls. It is important that the primer allows the walls to "breathe" and does not isolate water vapor inside the house, for example, for this you can use a primer "Knauf-Tiefengrunt" or similar.
Step 3. We apply a thin first layer on the pre-primed outer sheathing sheets, spread a fiberglass mesh on top, embed it a little into the first layer (in addition, the mesh can be “shot” with a construction stippler). Then we apply the second layer of plaster mixture.
Step 4. Painting the facades in the selected color. The paint used for facades should also not isolate water vapor in the wall.
