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Woodsafe® PRO™

Woodsafe® PRO™ is a perfect choice for fire-retardant treated wood in both interior applications such as wall and ceiling cladding and acoustic panels, as well as for exterior façade cladding intended for paint coating.

Woodsafe® WFX™

Woodsafe® WFX™ is the only fire-retardant treatment on the market approved according to use class EN 16755 EXT, making it possible to choose façade cladding designed for natural weathering — that is, without surface coating.

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Comprehensive Assessment Before Selecting a Solution

As a consultant, it is crucial that every assessment is based on reliable, verifiable, and correctly applied documentation. It is not enough to have a single test result or certificate—it is the overall picture that determines whether the solution is technically and legally sound. Wood species, density, construction, Field of Application (FoA), fire class or system class, and the correct use class must always be assessed in context.

In practice, pitfalls arise when documentation is used outside its approved scope of application. A common example is when an SP Fire 105 result is cited even though the project’s implementation differs from the tested system—or when the use class according to EN 16755 is completely overlooked. The result can be a solution that looks formally correct on paper but lacks validity upon review.

This section aims to clarify what must be verified, how different parts of the documentation are interconnected, and what pitfalls arise when parts of the whole are treated in isolation. The goal is to provide you, as a consultant, with a solid foundation for correct application, clear specifications, and long-term, sustainable decisions.

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SP Fire 105 – Classification Requires the Right Context

For exterior cladding in accordance with SP Fire 105, it is not sufficient to have a single test result. The classification applies only to the system that has actually been tested and approved. Differences in wood species, structural design, and verified service class may mean that a seemingly equivalent solution is not valid in practice.

For SP Fire 105, the following must always be verified:

  • Wood species and density —must correspond to the tested system

  • System design —panel type, air gap, fastenings, and backing material

  • Project implementation – must not deviate from the test specifications

  • Use class EN 16755 EXT – required for exterior use

  • Surface treatment – if paint or glaze is included, it must be verified together with the system

  • Third-party review – classification and approval must be established by a notified body

Conclusion:
SP Fire 105 cannot be assessed in isolation. Only when the wood species, system design, and service class EN 16755 correspond to the tested design is the facade solution correctly specified and legally valid.

  • Pitfall 1: Incorrect Application of SP Fire 105
    In the case of facade cladding, SP Fire 105 testing is sometimes cited even though the project’s design does not conform to the tested and approved system, or without verification of the EN 16755 EXT performance class. Deviations in panel type, air gap, fastening, underlying material, or surface treatment may mean that the test is no longer valid for the specific application. Without proper system compliance and a verified performance class, established through third-party review, there is no legally valid proof that the facade requirements are met. This can lead to serious safety and legal consequences during inspections or audits.
  • Pitfall 1: Recommendation
    The safest way to avoid this pitfall is to always request a Type Approval Certificate or Assessment issued by a third-party notified body, such as RISE.This ensures that both SP Fire 105, service class EN 16755 EXT, and the specific design in question are covered by reviewed and valid documentation, with supporting evidence that holds up during design, inspection, and legal review.
  • Pitfall 2: The Role of Surface Treatment Is Misunderstood
    For exterior facade cladding, the primary purpose of the surface treatment is to protect the fire-retardant material from moisture and leaching. For traditional, water-soluble fire-retardant agents, this is crucial—without a functional paint or surface treatment system, fire performance risks deteriorating over time. For conventional systems, therefore, the paint system must be tested and approved in conjunction with the fire retardant for the EN 16755 EXT application class to be valid. Without verified documentation, there is no legally sound basis for exterior use, with potential safety and legal consequences.
  • Pitfall 2: Recommendation
    Always ensure that the surface treatment and fire protection are verified together. Request a Type Approval Certificate or Assessment from a third-party notified body, such as RISE, that clearly states that use class EN 16755 EXT applies to the specific paint or surface treatment system in question.This provides a coherent and verifiable basis that holds up during design, inspection, and legal review.