OSB Board

Looking to buy OSB board from reliable suppliers? Here, at Theo’s Timber Ltd, we manufacture and supply this product is a range of sizes for various projects. Since 1963 when it was introduced, Oriented Strand Board has been used as a viable alternative to Plywood. It is most suitable for load-bearing functions during construction. The product is an engineered wood that contains wood strands held together by adhesives. During mixing, the strands are laid out in a particular orientation. The waterproof resin that is used for the bonding gives the material a durability that makes it ideal for high-quality constructions. It can withstand a significant amount of stress. We have an extensive range of OSB board selections for all kind projects.

Versatile Building Material

OSB board has gained a larger market share than plywood over the years, which is why the material comes in various styles. Your requirements will determine which OSB sheets to get. Commonly, builders opt to use OSB as sheathing in walls, roof decking and as subfloors. The pliable wood can also be used in making furniture. One huge advantage you gain is the consistency of the timber due to the high-pressure bonding of the wood chips and resin. This property means you do have to worry about knots in the sheets.

OSB BoardProducts You Can Depend On

Theos Timber Ltd is the right partner when you need OSB board because we stock only the best. Our sheets are rated to ensure that they meet the required standards. They come in different grades and thicknesses so you can pick what works. The OSB may not have a continuous grain similar to that of wood, but it can be polished to give a beautiful surface, especially when using it in the exterior of the home.

OSB Board Suppliers

If you want a cheaper alternative to plywood for construction, OSB is worth a try. The quality material guarantees excellent construction, and we have it in various size options. Contact us for details about our OSB sheets and how they can suit your structural requirements.

What Is Oriented Strand Board?
Oriented Strand Board, or OSB Board as it is often known, is a form of engineered wood which can be recognised by the characteristic wood strands which are visible on the board’s surface.

Since its invention in 1963, OSB has gained in popularity, overtaking plywood to the point that it now commands 66% of the market share in structural panels. The board has a wide range of uses, the most common being furniture production, roof decking, sheathing in walls and flooring.


OSB is made from layers of shredded wood strips that are compressed and firmly bonded together using a mixture of moisture resistant resin adhesives and wax. The finished OSB panels have similar properties to plywood, and are equal to plywood in both durability and strength, in fact, building codes recognise both plywood and Oriented Strand Board under the same term of “wood structured panel”. When tested to failure, OSB has also proven to be very strong, outperforming milled wood panels.

Like all wood-based panels, there are no special tools required for the cutting and installion processes; it can simply be worked with standard woodworking tools.

Oriented Strand Board vs Plywood

While Oriented Strand Board and plywood panels are suitable for many of the same uses; there are some differences that you may wish to take into account when choosing the material for your project.

Durability and Strength

Both OSB and plywood are equal in durability and strength. This usually comes as a surprise to many people because oriented strand board looks like many pieces of wood have been glued together. Typically, building codes recognise both OSB and plywood to be the same in their properties, and they use the term “wood structural panel” when describing them. Plywood subfloors, however, are stiffer than oriented strand board by around 10 per cent. Consequently, oriented strand board floors are likely to do the following:

• Lead to soft, spongy floors.
• Make hard floor surfaces crack (like tile).
• Squeak as a result of floor movement.

oriented strand board factsPrice

OSB board is cheaper than plywood for sale,  when used as roof decking, sheathing and subfloor. This has no doubt contributed to its growth in popularity over recent years. Oriented Strand Board is often the favourite choice for projects where budget is a consideration.


Plywood is approximately 10% stiffer than OSB and is, therefore, less likely to cause problems such as soft spongy floors, creaking floors and cracking of tiles when used as flooring.

Panel Size

OSB panels can be manufactured in a range of thicknesses and strengths, and can also be manufactured in longer length panels (16 foot, and possibly more) than plywood (usually only available up to 10 or 12 foot). This greater size can make OSB a preferable choice for projects where longer or wider panels are required.

Water Resistance

While Oriented Strand Board is water resistant, it is not waterproof and is less able to breathe and release moisture than plywood. OSB is, however also available in a version for exterior wall applications with a protective layer laminated to one side. Although this option is more expensive than standard Oriented Strand Board, it provides added durability and performance.


Both OSB and plywood are used for subfloors, walls and sheathing roofs. They work equally well when it comes to these uses, they are easy to drill into, plus they have an equivalent capability of holding nails. However, oriented strand board is considered to be less resistant to water (OSB swells in thickness when it is exposed to moisture), thus some people prefer using plywood for subfloors as well as roofs. Some builders find oriented strand board panels easier to use as they have pre-printed gridlines for facilitating measuring, marking, cutting plus fastening.

Also, plywood manufacturers have introduced grid-marked sheathing; it’s advisable to use this because it speeds up installation. Oriented strand board panels are manufactured in lengths of up to 16ft (or sometimes even higher), whereas plywood is typically limited to 8-10ft. Therefore, oriented strand board is preferable for applications whereby wider or longer panels required.

Note that some manufacturers of OSB use advanced technology in making high quality oriented strand board panels, which includes products that are more moisture-resistant. These are more expensive compared to traditional OSBs, but they may be worth the price because of their durability and performance.

Environmental Factors

Oriented strand board can be made from trees with a small diameter like poplar that can be easily farmed, while plywood requires trees from old-growth forests, with a larger diameter. Moreover, oriented strand board releases more formaldehyde (a carcinogen that’s off-gased) compared to plywood.

Oriented strand board is pushing plywood aside unceremoniously as the structural panel of choice. OSB is visually striking that people need a technical explanation regarding the material from builders. Today, oriented strand board has 70 to 75 per cent market share, while plywood has about 25 per cent share. Oriented strand board is in our future; the products of OSB will improve.

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