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Exterior Fire-X®

Standards and Specification Information

Exterior Fire-X® FRTW have been tested to BS EN 13501-1 ‘Fire classification of construction products and building elements’.

These tests are commonly referred to as ‘reaction to fire tests’. Reaction to fire tests are commonly called up in regulations in both the building and transport sectors. The classifications of flammability are A1, A2, B, C, D, E and F.

Koppers currently holds approvals for many of the most commonly specified species. Below is a list of just some of the approvals held.

  • Softwoods (Spruce, Douglas Fir, Western Red Cedar, Larch...)
  • Hardwoods (European Oak, Sweet Chestnut...)
  • Thermally Modified Wood (Frake)

Further materials are undergoing testing on a continuous basis, please contact us for a comprehensive list.

Please check with Koppers for specific sizes tested and approval classification achieved. Exterior Fire-X® treated wood can also be CE marked.

Exterior Fire-X® is able to meet the requirements of HR (humidity resistant) treatment, DI (dry internal) and LR (leach resistant) specifications.



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