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Fire Retardant Plywood

Chemically treated plywood with improved fire retardant attributes.

Through Lonza Wood Protection we offer Dricon high pressure impregnation treatment which will upgrade a range of untreated plywood options to either a Euroclass B or Euroclass C Reaction to Fire rating as required in line with the requirements of EN13501-1.

Dricon is a WPA approved INT2 humidity resistant, water-based fire treatment impregnated into the fibres of the plywood that provides maintenance free, long term, assured performance during service life for both dry and humid internal end uses.

If your project requires Euroclass B or Euroclass C rated plywood to comply with UK Building Regulations, please contact us directly to discuss your enquiry.

Typical Applications
  • Veneering
  • Laminating
  • Joinery
  • Shopfitting
  • Furniture
  • Exhibitions
  • Stage sets
  • Laser cutting
  • Model making
  • Automotive Applications
Applicable Standards
  • EN ISO 11925 – Ignitability test.
  • BS EN 313 – Plywood classification & terminology.
  • BS EN 314 – Plywood bonding quality.
  • BS EN 635 – Plywood classification by surface appearance.
  • BS EN 636 – Plywood specification.
  • BS EN 13501-1 – Fire Classification of Construction & Building Products.
  • BS EN 13823 – Single Burning Item Test (SBI).
  • BS EN ISO 1182 – Non-combustibility Test.
  • BS EN ISO 1716 – Determination of the Head of Combustion.
Quick Reference Guide – Fire Ratings

A request we commonly receive is that for a panel with a 1 hour or ½ hr fire rating.

30 or 60mins relates to the concept of Fire Resistance and typically relates to the ability of an elevation or door to withstand the passage of a fully developed fire for said amount of time.

Euroclass relates to the concept of Reaction to Fire and focuses on initial fire growth phase. A Euroclass rated panel may form part of a fire barrier system requiring 30 or 60 mins Fire Resistance overall. We recommend that suitability of a Euroclass rated panel within the design is based upon 3rd party assessment or independent testing specific to the project in question.

There are 7 Euroclass classifications ranging from A1 to F. In line with the Construction Products Regulation (2013) each Euroclass rating requires testing against the relevant European fire test methods – see table below.

Hanson Plywood offer a range of panels manufactured with an A1 rating (see below). Untreated wood-based panels such as plywood, OSB, MDF & Chipboard typically achieve a Euroclass D or E rating. Fire rated panels can be supplied to a Euroclass B or Euroclass C fire performance as required depending upon regulatory requirements.

European Test Standard
National Class (England & Wales)
National Test Standard (England & Wales)
BS EN ISO 1182 BS EN ISO 1716
BS 476: Part 4
BS EN ISO 1182 BS EN ISO 1716 BS EN 13823
Limited combustibility
BS 476: Part 11
BS EN 13823 BS EN 11925-2
BS 476: Part 6 BS 476: Part 7
BS EN 13823 BS EN 11925-2
1 & 2
BS 476 : Part 7
BS EN 13823 BS EN 11925-2
BS 476: Part 7
BS EN 11925-2
BS 476 : Part 7
No performance determined
No Test
Class C
2745mm x 1220mm
2440mm x 1220mm
Want to know more about Fire Retardant Plywood? Simply fill out our Quick enquiry form or call us on 01422 330 444