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18mm OSB 3 Board

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43 reviews
Rated 4.9 out of 5 stars
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Robust structural OSB 3 panels made from cross-oriented bonded wood strands. This 18mm thick OSB board provides strength for load-bearing applications like flooring, roofing, and wall sheathing.

We only supply OSB/3 sheets. This means they are load-bearing boards for use in humid conditions. Order 18mm OSB 3 boards online today, fully cut-to-size.

Please note: OSB is a structural-grade board designed primarily for construction use. Boards may arrive with printed manufacturer stamps on one face. For aesthetic projects, you can simply use the reverse side of the board.

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mm
Min: 100mmMax: 2440mm
mm
Min: 50mmMax: 1220mm

Approximate Weight: 56.77 g

Free delivery when you spend £250+

Estimated delivery: from Check My Postcode

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Specifications

Material Wood - Oriented Strand Board (OSB)
Finish None
Thickness 18mm
Maximum Sheet Size 2397mm x 1197mm
Minimum Sheet Size 100mm x 50mm
OSB Grade OSB/3
Cutting Tolerances +/- 1mm

Smartply Datasheet

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.

Delivery depends on the size of your order

Reviews

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4.9 / 5 43 reviews
Mr Feakes, 19th May
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Top drawer. Exactly what I asked for.
Verified, Collected by Cut My
Paul, 17th May
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Cut accurately to size , very good quality
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Customer, 11th May
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Top quality and precision cut. 😁
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Kamil, 11th May
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Osb boards are solid and been cut mo my perfect dimensions
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Paul Harrison, 4th May
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As required and excellent service and quality
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Fletcher, 22nd April
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Ideal for use as medium load bearing shelves and good value for money.
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Robert Royle, 15th April
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This ‘shelf’ is exactly what I was after and is perfect for my project. My second time using cutmy and I’m very happy.
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Lesliejane Royle, 31st March
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I made a long tray to attach to my window ledge for the cats to lounge in during the good weather, this seems extremely sturdy and I can’t washy to fix it up on there
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Alexei Vorotynov, 24th February
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I bought this OSB sheet to tackle my washing machine vibration on a suspended laminate floor. The sheet is of good quality and does the job perfectly.
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Marco-Pierre Biondi, 11th October
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Cut perfectly to size and great quality. Used as flooring for a small outdoor shed.
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