OSB (English OSB - oriented strand board) - 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 tree species. 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.
Components for the production of panels are safe, environmentally friendly.
Comparison of OSB and plywood
Both materials are made from woodworking waste, but there is a difference between them.
Index | OSB | |
The basis | Chips of a certain size, obtained from one type of tree | Shelled small veneer from any tree |
Binder | Natural resins, wax | Resins, including phenolic and formaldehyde |
Strength | Label dependent | |
Uniformity | No operational conditions | Possibility of stratification, knotty |
Weight | 550-700 kg / m3 | 500-700 kg / m3 |
What oriented slabs exist
Kinds:
- OSB1. Sheet with low weight, density, thickness. It is used in the furniture industry.
- OSB2. A denser sample with an increased number of layers. Used for sheathing structures inside dry rooms.
- OSB3. Suitable for rooms with high humidity of periodic (intermittent) exposure. The thickness of the sheet is increased, the strength allows the product to be used in conditions of moderate mechanical stress.
- OSB4. Reinforced panel with high moisture resistance coefficient. Minus is the price.
Size range
OSB sizes are not given to one standard. Suppliers offer cutting by individual standards, sellers may also be presented with plates of different sizes.
The main parameter that determines the types and technical properties is the thickness of the sheet:
- 2-16 mm. Thin sheets with low strength, low weight. Designed for cladding surfaces with small, intermittent loads: walls, ceilings, roof bases. Used in the manufacture of furniture fragments.
- 17–32 mm. The increased thickness provides increased panel bending strength, the moisture-resistant effect of the coating makes it possible to cover damp rooms. Sheets are used to create SIP-panels, finishing surfaces with high loads: walls, floors in industrial premises.
Finished products are sawn along a dimensional grid, the edges remain flat edges. For ease of installation, the slices are grooved.
OSB sizes are presented in the table.
Index | Flat cut | With locks | ||||||||||
Size mm | 2440x1220, 2500x1250 | 2440x1220, 2440x590, 2500x1250 | ||||||||||
Thickness mm | 9 | 10 | 11 | 12 | 15 | 16 | 18 | 22 | 15 | 16 | 18 | 22 |
Areas of use
Scopes of use of OSB:
- Interior rough or decorative wall cladding in dry and wet rooms.
- Preparation of ceilings, steps of wooden stairs, floors for finish coating.
- Production of SIP panels for the construction of frame houses.
- The basis for roofing.
- Fencing of construction sites around the perimeter.
- Laminated panels are used to assemble reusable formwork.
In the trade and production sectors:
- Creating shelves, shelving.
- Production of furniture frames.
Specifications
The properties of oriented strand sheets depend on the thickness. But technical characteristics remain high in comparison with other materials (see table).
Index | Unit rev. | Value |
Density | kg / m3 | 550–700 |
Bending Strength (Wet) | MPa | 13 |
Bending Strength (Dry) | MPa | 4 |
Coefficient of thermal conductivity | W / m * K | 0,13 |
Sound insulation coefficient | db | 18 |
Water absorption | % | 15 |
Moisture resistant effect is in panels whose thickness exceeds 16 mm. To increase resistance to water, the contact surface is laminated.
The combustibility class is B2 (moderately flammable), G1 (low combustible). Resistance to fire and fire makes OSB a reliable and safe material.
Specifications
Advantages:
- Thick specimens with low weight are able to withstand the effects of several centners.
- The bending strength in the wet state allows you to make the lining of curved surfaces with a small radius of curvature.
- Structural uniformity and reliability of fixation of components with each other. This eliminates stratification, the formation of blisters.
- Ease of processing.
- Impregnation prevents the growth, development of pests.
- High heat-insulating and sound-absorbing properties.
- The shape and dimensions specified during cutting and installation do not change throughout the operation.
- The sheathed surface is not afraid of the effects of household chemicals.
OSB has a relatively low weight, it can be mounted on wooden structures without additional reinforcement.
Price
The cost depends on the size, number of layers. Average prices in Moscow and the region are presented in the table.
Name | Size, thickness, mm | Price rub / sheet |
OSB1 | 2500x1250, 8-15 | 448–807 |
OSB2 | 2500x1250, 9-12 | 590–759 |
OSB3 | 2500х1250, 9–22 | 622–1266 |
OSB4 | 2500х1250, 8–18 | 490–980 |
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 can have the same thickness of 8 mm, but group characteristics are preserved due to the selection of raw materials, the use of binders, technology.
Mounting Features
The principle of panel fastening is landing on a wooden frame using self-tapping screws. The light weight of the product does not require the installation of thick rails as guides. For the organization of interior and other partitions, a frame is installed, lining is performed.
To create a flooring under the roof, the sheets are laid on the logs. The pitch should not exceed 400 mm.
Conclusion
OSB - material used to create the frame of houses, sheathing the interior, installation of formwork under monoliths. OSB has high technical characteristics, reasonable price, from 143 rubles / m2.