SKU: 32581047405

OSB 3 Sheet 2440mm x 1220mm

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Description

OSB 3 Sheet 2440mm x 1220mmOSB 3 sheet 2440mm x 1220mm is a structural panel board rated for use in humid conditions, certified to EN 13986 and BS EN 300. Manufactured from oriented wood strands bonded with resin, it is widely used in roofing, flooring, walling, and hoarding across domestic and commercial construction. Specifications Property Detail Material Oriented strand board (wood strands bonded with resin) Grade OSB 3 load bearing use in humid conditions Standard EN

OSB 3 sheet 2440mm x 1220mm is a structural panel board rated for use in humid conditions, certified to EN 13986 and BS EN 300. Manufactured from oriented wood strands bonded with resin, it is widely used in roofing, flooring, walling, and hoarding across domestic and commercial construction.

Specifications

Property Detail
Material Oriented strand board (wood strands bonded with resin)
Grade OSB 3 - load-bearing use in humid conditions
Standard EN 13986, BS EN 300
Nominal Size 2440mm x 1220mm
Thickness Options 11mm, 18mm
Use Class Humid / semi-exposed conditions (protected from permanent wetting)

What it's used for

  • Flat and pitched roof decking as a structural sarking board beneath roofing felt or membrane
  • Suspended and ground-floor decking where a load-bearing panel is required
  • Timber-frame wall sheathing to provide racking resistance in new-build and renovation projects
  • Site hoarding, temporary partitions, and general construction shuttering

Fitting and handling

Store boards flat on a level surface, off the ground, and keep them dry and covered before installation. On site, allow a 3mm expansion gap at all sheet edges and ends to accommodate any moisture movement. Fix with ring-shank nails or screws at 150mm centres to supports, and ensure every sheet edge bears on a joist, noggin, or rafter where structural performance is required.

FAQ

What is the difference between OSB 2 and OSB 3?

OSB 2 is rated for dry conditions only. OSB 3 carries a humid-conditions rating under BS EN 300, making it suitable for roof decks, floor decks, and wall sheathing where some moisture exposure is possible during and after construction. For most UK building projects, OSB 3 is the correct choice.

Can OSB 3 be used as a finished floor surface?

OSB 3 can serve as a structural sub-floor, but it is not typically left as a finished walking surface in habitable rooms. It is best covered with a suitable floor finish such as carpet, vinyl, or engineered flooring. Where foot traffic is expected during construction, the 18mm thickness offers better load distribution and stiffness.

Do I need to treat OSB 3 boards before use?

OSB 3 does not require additional treatment for standard structural applications in humid conditions, provided it is incorporated into a complete building system with appropriate weatherproofing above. It should not be left permanently exposed to rain or standing water without a protective covering such as roofing felt, membrane, or cladding.

Nottage Timber Merchants supply OSB 3 sheet direct to trade and self-build customers, with competitive pricing and reliable stock available from our Bridgend yard. Browse our full range of OSB sheets, and contact us for next-day delivery options across the South Wales and Bridgend area.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 32581047405

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