When the need arises to carry out construction or finishing work, the problem immediately arises: what material to use. After all, the work must be done reliably, and the structure must last a long time. We must not forget about financial investments; they must be fully justified. Therefore, OSB boards, which have many positive characteristics, are increasingly used.
What is OSB or OSB? You should immediately pay attention to the variety of names that are found everywhere. Sometimes there are even disagreements on this issue. So, OSB and OSB are an abbreviation for oriented strand boards, which comes from the English OSB.
The process of manufacturing OSB boards from wood chips in several layers Based on the name, we can conclude about the manufacturing method. For production, wood chips are used, which have different sizes. This is how such a board differs from chipboard and fiberboard, where the base is sawdust. Strength and elasticity are obtained due to the arrangement of layers - each of them is perpendicular to the previous one. This feature is borrowed from plywood, where the veneer has the same consistency. Of course, we must not forget about the adhesive composition, which affects the quality characteristics.
OSB is divided into types, or rather into classes. They vary in scope. It is customary to highlight:
- OSP-1. The material has low stability. Used for minor work.
- OSP-2. Suitable as cladding for load-bearing structures, but only inside dry rooms.
- OSP-3. The most common type that can be used for finishing and construction work. Withstands interaction well with humid environments. But prolonged exposure leads to gradual warping.
- OSP-4. The most sustainable option. But there is one drawback - high cost.
OSB is divided into several classes for use in various areas Note! Nowadays there is a lot of talk about the harmfulness of OSB. Indeed, the binder is formaldehyde resins with additives. But modern technologies make the material completely safe for humans. Although when choosing slabs, you must definitely pay attention to the certificate of conformity.
Oriented strand boards are a popular material used in home construction. From the above it becomes extremely clear what OSB is. The popularity of the material has become quite natural, thanks to its characteristics, which are combined with a fairly low price. That is why OSB has a wide range of applications. But it must be taken into account that even with all the resistance of the slabs to a humid environment, they are susceptible to destruction.
Indoor work
For interior decoration, OSB is used in the following situations:
1. Creation of floor coverings
Slabs are an ideal material for such work. They are quite smooth (error no more than 0.3 mm) and strong. They can be laid directly on the base. For example, they are perfect for covering concrete screeds. Laminate or tiles are ideal for laying on such a surface.
OSB boards are perfect for creating flooring But most often OSB is used for the subfloor of households. Although it is in this case that the greatest number of mistakes are made. Therefore, the following parameters need to be taken into account:
- Lag location. The distance between them depends on the selected product class. If you make a mistake in this indicator, the floor will begin to sag.
- Substrate device. A typical mistake is considered to be direct location above open ground. This causes the slab to begin to absorb moisture. Everything happens over a long period of time, but the result is the same - the appearance of mold and subsidence of the structure.
- OSB class. For such work, third class material is used. Although, if the work is carried out for surface cladding, then types with lower performance can be used.
2. Use of OSB boards for installation of internal partitions
The construction of internal partitions using OSB is a universal and practical solution. It allows you to quickly obtain a flat surface that requires minimal preparation for final finishing.
Construction of internal partitions using OSB
The convenience of this option lies in the fact that it becomes possible to additionally insulate the room. OSB is laid on a pre-built cellular frame, which is pre-filled with mineral wool.
Construction of the frame and insulation with mineral wool is an important stage in the installation of internal partitions made of OSB Note! For such work, material of the second and third classes is used. Additional processing consists of applying paints and varnishes. The final decorative coating is also taken into account. For example, to cover walls with tiles, it is necessary to putty the surface.
Installation of slabs
There is a general scheme of work:
- At the first stage, preliminary priming is carried out. This is done with penetrating compounds. This measure allows you to reduce the absorbency of the slabs, as well as eliminate the possibility of resin release. The further process depends entirely on the decorative coatings.
- If you plan to use wallpaper, then add a little PVA to the glue.
- When painting, it is better to choose oil paints. And the surface is impregnated with drying oil.
Before using OSB boards, they must be treated with a primer. Note! Minor problems may arise when OSB sheets have a glossy front. This means that wax or paraffin was previously added to the glue. Therefore, impregnation must be done with a primer containing quartz sand. This creates a roughness that will allow other materials to adhere.
Using slabs outside buildings
Excellent performance characteristics allow the use of OSB boards as a building material It is not surprising that this material has become widely used for cladding work on houses and other buildings. Most often it can be found in the following situations.
Construction of frame structures
In this case, the use of OSB boards occurs in interaction with other materials. Namely, the sheets are used to create sandwich panels. They are ready-made blocks that are lined with particle boards. There is insulation inside this structure.
Thus, it is possible to significantly reduce the time required to construct objects. Of course, it is necessary to take into account the special climatic conditions of each territory. The main mistake is that the sandwich is assembled in violation of technologies that are quite simple.
Note! Sandwich panels are not used for many jobs. For example, during multi-story construction.
Sheathing of external partitions
For such purposes, only OSB-3 is used. Of course, you can use a higher, fourth class, but this is unreasonably expensive.
To install OSB boards, a frame is built on the basis of wooden beams Such work is carried out using the following technology:
- The main frame is being erected. This is done using a wooden beam, which is pre-treated with the necessary compounds. It must be taken into account that the use of OSB boards requires a rigid structure. Particular attention is paid to the foundation or supports.
- Before facing, the slabs require preliminary preparation. They are quite sensitive to constant environmental influences. The ends begin to suffer first, so they are thoroughly impregnated.
- The surface itself needs painting or primer. Much depends on the final type of finish.
It is important to consider that OSB boards cannot act as the final layer. They must be covered with a protective material.
Working with external walls
The use of OSB occurs according to the following scenario (when painting):
- The ends are well processed. The sheets are laid leaving small gaps. Such seams are filled with acrylic sealants.
- Primer mixtures are applied. If required, additional impregnation with water-based sealants occurs. It is necessary to dry and sand the surface.
- Next, façade plaster is laid; it is better to choose elastic compounds. Attention is paid to joints that are pre-reinforced.
- Now you can paint the walls with acrylic or oil mixtures. They have good stability.
Building facades made of OSB boards look very attractive Other OSB features
In fact, all types of OSB are becoming increasingly popular. Therefore, the scope of their application is not limited only to finishing or construction activities. Several alternative uses:
- Manufacturing of interior items. In particular - furniture. For the most part, these are frames for sofas and armchairs. Although there are options for cabinet products.
- Various types of containers. This may be packaging for transportation.
- Vehicle finishing. Most often truck trailers.
A material such as OSB is the key to successful construction. But many people mistakenly believe that it becomes possible not to comply with the rules and technology. OSP makes the process easier, but does not make it less responsible.
OSB is an oriented strand board made from spruce or pine using synthetic resins. This article will discuss the main types of boards, technical characteristics of the OSB-3 board (OSB) and its scope.
The following types of plates are distinguished:
- OSB-1 for use in dry conditions, general purpose;
- OSB-2 for use in dry conditions, load-bearing boards;
- OSB-3 for conditions of high humidity, load-bearing boards;
- OSB-4 for high humidity conditions. These plates are designed for heavy loads.
OSB board (OSB-3) and its main technical characteristics
You can measure how suitable an OSB board is for use in wet or dry conditions by the degree of swelling of a given material in thickness. According to the standard, the swelling of slabs from interaction with moisture should not exceed the following indicators: OSB 1 - 25%, OSB 2 - 20%, OSB 3 - 15%, OSB 4 - 12%.
The strength of the slabs is helped by measuring the flexural strength modulus and tensile strength. According to the EN 300 standard, the following indicators must be met.
| Unit change | Flexural modulus, longitudinal axis | Flexural modulus, transverse axis | |
| OSB-1 | N/mm2 | 2500 | 1200 |
| OSB-2 | 3500 | 1400 | |
| OSB-3 | 3500 | 1400 | |
| OSB-4 | 4800 | 1800 |
In terms of strength, type 2 and 3 slabs are the same, but in terms of moisture resistance, type 3 is better. In comparison with types 3 and 4 of boards, the characteristics of OSB-4 are better in terms of both strength and moisture resistance. For construction, OSB-3 is most often used, which is explained by its attractive price and characteristics quite suitable for this.
Main technical characteristics of the OSB-3 board (OSB) relative to other OSB boards and other building materials:
- high degree of strength. The indicators are 2.5 more than those of chipboard, but lower than OSB-4;
- high degree of moisture resistance. Higher than many materials and similar to OSB-2;
- convenience and ease of processing. The plate is easy to cut, drill, glue and paint;
- a small amount of voids, knots and peeling;
- protected from insects, fungi and mold;
- holds fasteners 25% better than chipboard and softwood plywood.
Using OSB-3 board
Based on the technical characteristics of the OSB-3 board, it is used for:
- external and internal wall cladding;
- production of SIP panels;
- flooring;
- roof decking, bases for soft roofing;
- production of temporary fencing;
- production of I-beams.
To summarize the above, you can be sure that the OSB board (OSB-3), the technical characteristics of which are excellent for many types of construction work. It has many positive characteristics, which gives a high level of quality to buildings where this material is used.
Moisture-resistant OSB board is used for sheathing roofs, walls and ceilings. It is particularly durable and stable in shape. Oriented strand boards are resistant to any climatic conditions and mechanical stress, and also have high sound absorption. The products comply with all building codes and have manufacturer warranties.
Buy OSB-3 boards in our store at a price of 589 rubles per sheet. Fast delivery in Moscow and the Moscow region. Moisture-resistant OSB is available in various sizes and thicknesses. Discounts for wholesale buyers!
OSB prices and manufacturers
| Kronospan OSB board in its structure is a three-layer wood panel made from oriented wood chips. Wide variety of thicknesses and sizes. | from 597 rub./sheet | |
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Taleon OSB board - withstands loads in conditions of high humidity. Over time they do not lose their quality characteristics. | from 552 rub./sheet |
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Kalevala OSB board - meets high environmental safety requirements, has all Russian certificates of conformity, sanitary and epidemiological conclusions and fire safety certificates. | from 627 rub./sheet |
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OSB board Bolderaja - made in Latvia (Oriented Strand Board with oriented flat chips). High performance material. | from 627 rub./sheet |
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OSB board Egger brand Eurostrand. The products manufactured by Egger are of the highest quality with a very wide range of thicknesses and sizes. |
from 627 rub./sheet |
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OSB sheets Kronopol - moisture-resistant panels are produced by one of the world's largest OSB production enterprises. Kronopol is manufactured using high technology and meets all safety requirements. | from 630 rub./sheet |
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OSB Norbord is one of the world's leading manufacturers of oriented strand boards (Belgium, Canada). | from 627 rub./sheet |
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OSB Louisiana Pacific is the largest North American corporation producing boards that are actively used for cladding exterior and interior walls and ceilings. | from 627 rub./sheet |
Characteristics of Oriented Strand Board
30 years ago, OSB 3 oriented strand boards began to be produced. The cost of such panels was significantly lower than their analogues, and therefore they almost immediately became widely used in construction. They are used for cladding walls outside the building, roofing (sheathing), and rough flooring. The panels are also used for the manufacture of furniture, commercial equipment, high-end containers, and even as removable formwork when constructing foundations or walls. OSB-3 sheets are cheaper than their analogues, and their consumer characteristics are in no way inferior to them.
Specifications:
The OSB-3 board is distinguished by its high strength, homogeneity of structure, and bending resistance. When loaded, the long interlaced chips transfer it to each other, forming a single structural element, free of stress concentrators and combining high strength with high elasticity. Thanks to this, screws, nails and other fasteners are firmly held in OSB sheets.
Order the product at our sales offices in Moscow and the region. The weight and density of the boards depends on the type of wood and technological processes. On average, the density is 600 – 700 kg per cubic meter. For example, OSB with a thickness of 12 millimeters and dimensions of 2440 x 1220 mm will weigh about 20-22 kilograms.
Classification:
- OSB/1 – used for interior decoration, not resistant to moisture;
- OSB/2 – used for structures and structures that are not used in wet environments;
- OSB/3 – used in wet and dry environments;
- OSB/4 is the most undemanding board. They can be used in any environment. Versatile in all respects.
Production of moisture-resistant OSB panels
OSB translated from English (Oriented Strand Board) is a board with increased moisture resistance. This material, consisting of three layers of coniferous wood chips, oriented longitudinally in the outer layers and transversely in the inner layers, is easy to process, does not crumble and holds fasteners well.
Moisture-resistant OSB panels are made by pressing and gluing long wood chips. The inner and outer layers are located perpendicular to each other, and there can be 3-4 such layers. The surface of the plate is always smooth. It is superior in strength to chipboard and MDF, but is close to plywood in its mechanical and physical properties. The products are relatively easy to sand.
It is advisable to use OSB with a thickness of 3. only in strict accordance with their intended purpose. Swapping is not recommended. A slab intended for an external wall cannot be installed from the inside. Since harmful substances can be released into the room and harm your health.
Where are OSB-3 panels used?
- wall cladding;
- roof sheathing - for concrete tiles, metal tiles, slate;
- subfloors and single-layer floors;
- partitions, decorative wall cladding;
- I-beams or I-beams;
- removable reusable formwork for concrete work;
- production of packaging - boxes, containers.
How choose quality OSB board products
Panels of varying quality are available on the construction market. You should choose products and manufacturers very carefully. Order moisture-resistant OSB boards in our online store. Please check with managers for sizes. The goods can be picked up or ordered delivered.
What properties should a quality product have:
- When sawing, the slab does not crumble, deteriorate or break.
- In addition, they do not warp when wet and dry.
- The nail or screw fits easily into the OSB.
- It can be sanded, varnished, painted, laminated, tinted.
There are no delaminations, knots or other mechanical damage in the thickness of the OSB, leading to a decrease in the quality of the finished product. Elasticity and strength are significantly higher than that of solid wood. Increased moisture resistance, resistance to rotting and fungi. Standard boards do not have cavities, knots and other similar defects that may be observed with other wood panels.
When producing OSB panels, their ends are treated with moisture-resistant sealants. This significantly extends their shelf life on the construction site. In addition, the sheets are less susceptible to drying out than plywood and have a better combination of cost and quality. Contractors are increasingly buying this particular one for roofing work. Markings are applied to the surface of the sheets. The thickness of OSB is usually 6 – 18 millimeters. But, if the customer needs a sheet of other size and thickness parameters, then producing it will not be a big problem.
The edges of the products can be either smooth or milled, with grooves and ridges for connecting adjacent slabs. When covering the floor, OSB is used, milled on both sides. If a house is being built using frame technology, then they are used for external and internal cladding. The rest of the space between the sheets is filled with insulation.
Size Chart
Which OSB is best to choose for finishing is up to you to decide!
- Panel composition
- Comparison of OSB and plywood
- Applications
- Specifications
- Characteristics
- Installation features
- Conclusion
OSB (English OSB - oriented strand board) is an oriented strand board, for the production of which waste from the woodworking industry is used.
Panel composition
OSB sheets are made from shavings of different types of trees. Fragments of certain sizes are glued together with synthetic wax and natural resins. The plate is multilayer, the layers are oriented in different directions, which increases the technical characteristics of the material.
The components for the production of panels are safe and environmentally friendly.
Comparison of OSB and plywood
Both materials are made from wood waste, but there is a difference between them.
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Indicator |
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Shavings of a certain size obtained from one type of wood |
Peeled fine veneer from any trees |
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Binder |
Natural resins, wax |
Resins, including phenolic and formaldehyde |
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Strength |
Depends on the marking |
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Uniformity |
Absent within operating conditions |
Possibility of delamination, knotiness |
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550–700 kg/m 3 |
500–700 kg/m 3 |
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What oriented plates exist?
- OSB1. Sheet with low weight, density, thickness. Used in the furniture industry.
- OSB2. A denser sample with an increased number of layers. Used for cladding structures inside dry rooms.
- OSB3. Suitable for rooms with high humidity, periodic (intermittent) exposure. The thickness of the sheet is increased, the strength allows the product to be used under conditions of moderate mechanical stress.
- OSB4. Reinforced panel with a high moisture resistance coefficient. The downside is the price.
Size range
OSB dimensions are not standardized. Suppliers offer cutting to individual measurements; sellers may also offer slabs of different sizes.
The main parameter that determines the types and technical properties is sheet thickness:
- 2–16 mm. Thin sheets with low strength, low weight. Designed for covering surfaces with small, unstable loads: walls, ceilings, roof bases. Used in the production of furniture fragments.
- 17–32 mm. The increased thickness provides increased bending strength of the panel; the moisture-resistant effect of the coating allows cladding of wet rooms. The sheets are used to create SIP panels, finishing surfaces with high loads: walls, floors in industrial premises.
Finished products are sawn according to the dimensional grid, leaving smooth edges on the slabs. For ease of installation, the sections are tongue-and-groove.
The dimensions of the OSB are presented in the table.
Applications
Areas of OSB use:
- Internal rough or decorative wall cladding in dry and wet rooms.
- Preparation of ceilings, steps of wooden stairs, floors for finishing coating.
- Production of SIP panels for the construction of frame houses.
- Base for roofing.
- Perimeter fencing of construction sites.
- Laminated panels are used to assemble reusable formwork.
In trade and production areas:
- Creation of shelves and racks.
- Manufacturing of furniture frames.
Specifications
The properties of oriented strand sheets depend on the thickness. But the technical characteristics remain high in comparison with other materials (see table).
Panels whose thickness exceeds 16 mm have a moisture-resistant effect. To increase resistance to water, the contact surface is laminated.
Flammability class - B2 (moderately flammable), G1 (low flammable). Resistance to fire and combustion makes OSB a reliable and safe material.
Characteristics
Advantages:
- Thick specimens with low weight can withstand the impact of several hundredweight.
- Flexural strength when wet makes it possible to cover curved surfaces with a small radius of curvature.
- Structural homogeneity and reliability of fixation of components to each other. This eliminates delamination and the formation of blisters.
- Ease of processing.
- Impregnation prevents the growth and development of pests.
- High heat-insulating and sound-absorbing properties.
- The shape and dimensions specified during cutting and installation do not change throughout the entire operation.
- The sheathed surface is not afraid of exposure to household chemicals.
OSB is relatively lightweight and can be installed on wooden structures without additional reinforcement.
Price
The cost depends on the size and number of layers. Average prices for Moscow and the region are presented in the table.
The thickness of the sheet does not always determine the price of the product: wood of different quality and origin is used for production.
OSB1 and OSB4 may have the same thickness of 8 mm, but the group characteristics are maintained due to the selection of raw materials, the use of binders, and technology.
Installation features
The principle of fastening the panels is to fit them onto a wooden frame using self-tapping screws. The light weight of the product does not require the installation of thick slats as guides. To organize interior and other partitions, a frame is installed and cladding is made.
To create a flooring under the roof, sheets are laid on joists. The pitch should not exceed 400 mm.
Conclusion
OSB is a material used to create the frame of houses, cladding interior spaces, and installing formwork for monoliths. OSB has high technical characteristics, an affordable price, from 143 rubles/m 2.
