OSB Sheets

£0.49 Inc. VAT
Max: 2397mm
Max: 1197mm

Approximate Weight: 34.69 g

In Stock
£0.49 Inc. VAT

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Oriented strand board (OSB), also known as sterling board, is a versatile and durable type of engineered wood. It’s formed by compressing layers of wood strands together with adhesives, with the strands pointing in specific orientations, which gives it its rigidity and strength. Due to its helpful mechanical properties, OSB is commonly used in construction for load-bearing applications. Other common uses of OSB are sheathing in floors, roof decking and walls, as well as a material for furniture production.

At CutMyPlastic we offer a number of FSC® certified, CE and BBA approved OSB/3 boards in 11mm, 15mm and 18mm thicknesses. You can buy sheet sizes up to 2440mm x 1220mm or order a bespoke size board cut to any size or shape. Using our CNC router we can cut OSB board within +/-3mm tolerance, giving precision accuracy and consistent duplication. If you have a specific shape or size in mind, well be able to make it - all you need to do is draw out your design and send it over to us in either CAD or a sketch format, it’s that simple. Whatsmore, we can also rebate, pocket and cut holes in your OSB board using our CNC router.

Different types of OSB

There are five types of panel classification for OSB sheets, standardised in BS EN 300 in terms of their resistance to water and mechanical performance:

  • OSB/0 – No added formaldehyde
  • OSB/1 – General-purpose boards and boards for interior fitments (including furniture) for use in dry conditions
  • OSB/2 – Load-bearing boards for use in dry conditions
  • OSB/3 – Load-bearing boards for use in humid conditions
  • OSB/4 – Heavy-duty load-bearing boards for use in humid conditions

We sell OSB/3 boards as standard.

Key Features of OSB Board


Our OSB boards are made to withstand the toughest of conditions. In recent years OSB has grown to become a leading material in the construction trade, overtaking a huge market share from plywood. As a great load-bearing material, that can cope with harsh conditions, this board is a perfect option.


Made from forming wood strands and drying with the addition of adhesives, OSB makes the most of multiple pieces of real wood thereby creating an all-round cheaper product. Also, one metre squared of our thickest OSB board (18mm) costs £38.80, dramatically cheaper than Plywood, which costs £77.83 per square metre (again at our thickest option of 18mm). This makes OSB a more cost-friendly option for DIYers, tradespeople and building companies.

Environmentally Friendly

OSB board is also a greener option when looking for timber supplies. OSB is made from lots of pieces of smaller wood, so can be created by using smaller trees that grow quicker. Plywood on the other hand requires large-diameter trees, which generally need to be harvested from old forest growths- a less green option.


OSB is perfect for painting and finishing for multiple projects and can be a great material for furniture creation, or for use in walls, or in weight-bearing options. It can also be treated with moisture-resistant resins to give it moisture-resistant properties.


Our OSB board oak sheets are easy to fabricate and can be cut, drilled and shaped to any requirements, so is a flexible, and attractive material to work with.

Applications & Uses

  • Flooring Construction
  • Wall Construction
  • Furniture like tables and chairs
  • Shelving
  • Roof sheathing



Material Wood - Oriented Strand Board (OSB)
Finish None
Available Thicknesses 11mm, 15mm, 18mm
Maximum Sheet Size 2397mm x 1197mm
Minimum Sheet Size 100mm x 50mm
OSB Grade OSB/3
Manufacturers Tolerances +/- 10% plus 0.4mm (e.g. 5mm cast sheet could vary from 4.1mm to 5.9mm)
Cutting Tolerances +/- 1mm

Frequently Asked Questions

What does OSB stand for?

OSB stands for Oriented Strand Board.

Is OSB water-resistant?

Most OSB is water-resistant, due to the construction process using wax, resins and wood strands. For truly waterproof OSB however, we recommend adding a waterproof coating.

Will OSB hold screws?

Yes, OSB can be screwed and nailed to any surface, as long as you have enough screws to fix it in place.

Is OSB stronger than Plywood?

OSB is 2 times stronger than plywood in shear. Generally, however, OSB and Plywood have a similar load strength.

What is OSB 3?

The term OSB/3 is used to describe a type of OSB, as follows: "load-bearing boards for use in humid conditions". This is defined in BS EN 300.

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Rated 4.7/5 on Feefo

First class - provided a small number of MDF sheets cut to meet my specific needs. Small order charge well worth the extra to get exactly what I needed.
My order was a very small one, but it was dealt with in the same way I would expect a huge order to be dealt with, as being 'very important'. I had felt a little nervous asking for the specific size I needed, but it was absolutely no problem. I was kept updated with delivery etc, and when my order arrived the packaging was unbelievably good. What I ordered was an MDF board which needed to be an exact size to fit in a specific place to accommodate my Doll's House. It was perfect. Really pleased, and grateful. Thank you.
Quick & neat
Readonable price, prompt delivery well packaged and cut to requirements. First Class !

Based on 842 reviews.