High-performance, engineered, strong and durable 30 mm oriented strand board (OSB) panel designed for use in humid conditions and suitable for the most demanding, heavy duty structural applications. Manufactured using advanced ContiRoll® resin technology, consisting of moisture resistant and formaldehyde-free bonding of wood strands, precisions strand orientation and continuous pressing.

Features and benefits:

  • Stronger and more durable than chipboard alternatives.
  • Reduced thickness swell, due to extra resin penetration.
  • More durable that P5 alternatives.
  • Suitable for use in Service Class 2 conditions.
  • Lighter than P5/ P6 alternatives, despite a larger surface area per panel.
  • Quicker to install due to larger panel size.
  • Zero added formaldehyde contributing to BREEAM credits and LEED points.
  • Manufactured from FSC® certified timber.
  • CE marked to EN 13986, and manufactured in accordance with EN 300.


  • Durable, moisture-resistant mezzanine flooring.
  • Industrial and commercial flooring.
  • Volumetric 3D modular builds.
  • Storage platforms.
  • Heavy-duty load bearing environments.
  • Space saving racking.
  • Heavy-duty shelving.
  • Online retail e.g. garment/ package handling in multi-tier warehousing.
  • Industrial warehousing and storage unit floor space additions.
  • Humid environments.

Structures comprising SMARTPLY OSB4 should be assigned to service class 1 or 2 as defined in EN 1995-1-1 (Eurocode 5). Consult manufacturer for further details.

Related literature

The following content references this product:

Standard product features

Size (l x w):

2400 x 675 mm.


30 mm.


Tongue and groove on the two long edges.


Secure to the supporting structure with suitable fixings at least 8 mm from the edge of the panel, 150 mm along the perimeter and 300 mm at intermediate supports for each panel.

Technical properties:

  • Reaction to fire: (to BS EN 13501-1 and EN 13986): Dfl-s1 (with flooring); D-s2, d0 (excluding flooring).
  • Thermal conductivity (to BS EN 13986): 0.13 W/m∙K.
  • Nominal density (to EN 323): 600 kg/m³.
  • Bending strength (to EN 310): Major axis: 24 N/mm². Minor axis: 13 N/mm².
  • Bending strength after cyclic test (to EN 321 and EN 310): 6 N/mm².
  • Modulus of elasticity (to EN 310): Major axis: 4800 N/mm². Minor axis: 1900 N/mm².
  • Internal bond (to EN 319): 0.35 N/mm².
  • Swelling after thickness (to EN 317): ≤12% (after 24 hours).
  • Formaldehyde release (to EN 120): ≤8.0 (E1) mg/100g.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-95/465 Oriented strand board

Product specification

An important note about specifying





+44 (0)1322 424900

Product reference


Manufacturer details

Persimmon House,
Anchor Boulevard,
Crossways Business Park,
Kent, DA2 6QH
Tel +44 (0)1322 424900
Fax +44 (0)1322 424920
NBS Plus
NBS National BIM Library