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SMARTPLY FR/FR BUILD OSB3 are flame retardant OSB3 panels developed to comply with the FR BUILD performance requirements in accordance with STA’s (Structural Timber Association) “Design guide to separating distances during construction” for timber frame buildings above 600m² total floor area. Zeroignition Solution, a water based, eco-friendly, fire retardant is added during panel processing, ensuring fire performance whilst maintaining structural integrity. FR Build OSB3 comply with reaction for fire Class Bfl for flooring and reaction to fire class C excluding flooring (wall and ceiling) as per EN3501. Panel is CE marked for structural use under attestation system 1. It guarantees our customers that initial inspection, continuous surveillance and evaluation of factory production control are supervised by external third party.

Product Information

Bfl s1 acc. to EN 13501
This FR classification is valid for the following end use conditions:
• Flooring applications
• Product composition-no variation allowed

C s2 d0 acc to EN 13501
This FR classification is valid for the following end use conditions:
• Wall and ceiling (including underside of roof in attic spaces applications)
• Free standing
• Product composition-no variation allowed

For further details including CE1, DoP and FR classification report, please contact our local FR product champion.

Intended use:  Internal use as structural components in humid conditions.

OSB3 FR has low emission formaldehyde rate E1 class and comes with FSC® certification.

Order a Sample

Product information



  • 2397 x 1197 mm

  • 2440 x 1220 mm

  • 2397 x 1220 mm


  • 15mm Bfl and Cs2 d0

  • 18mm Bfl and Cs2 d0

  • 11-18mm Bfl ONLY

Applications & Uses

All FR products guarantee indicated FR performance as per installation guide/field of application; ask our local FR product champion for details.

The most common use:

  • Wall linings

  • Partitions

  • Display panels

  • Celling

  • Elements of fairs and exhibitions

  • Flooring

Typical installations:

  • Hotels

  • Offices

  • Public libraries

  • Schools

  • Court houses

  • Hospitals

  • Cinemas

  • Discotheques

  • Some shipbuilding applications

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