# WPC fire performance: product ratings and assemblies

Canonical: https://woodplasticcomposite.net/guides/wpc-fire-performance-classification-cladding/
Language: en
Updated: 2026-10-01
Version: 1
Review: Technical and language review not yet recorded

## Summary

Wood and common polymer ingredients can contribute to combustion. A composite's fire performance must be demonstrated; mineral content or a marketing label is not enough.

## The technical principle

Ignition, flame spread, heat release and smoke are different aspects of fire behaviour. Reaction to fire also differs from the fire resistance of a building element. The book explains mechanisms, but its historical American examples are not current European approval documents.

https://woodplasticcomposite.net/guides/wpc-fire-performance-classification-cladding/#technical-principle

## What to specify and verify

For a European project, obtain the relevant classification report and its field of application. Check the profile, substrate, fixing arrangement, air gap and orientation covered. EN 13501-1 concerns reaction-to-fire classification; applicable project and national requirements still need competent assessment.

https://woodplasticcomposite.net/guides/wpc-fire-performance-classification-cladding/#specification

## Application and common mistakes

Do not transfer a decking report to a façade or interpret PVC-free as non-combustible. A change in formulation or installation may fall outside the report's scope. Review the complete assembly before specification, particularly where building height, escape routes or façade construction make fire requirements critical.

https://woodplasticcomposite.net/guides/wpc-fire-performance-classification-cladding/#application

## Discuss your project with Green Plank

For a Green Plank specification, request samples and current technical documents for the exact profile and intended application. Use the Green Plank link in Sources to explore the range and make an enquiry. Commercial disclosure: this portal features Green Plank. General material science does not certify any particular product.

https://woodplasticcomposite.net/guides/wpc-fire-performance-classification-cladding/#green-plank-project

## Key points

Property: Reaction to fire versus fire resistance.
Scope: Exact product and tested arrangement.
Approval: Applicable project requirements.

## Comparison

Specification check | Evidence to request
Property | Reaction to fire versus fire resistance
Scope | Exact product and tested arrangement
Approval | Applicable project requirements

## Is an American flame-spread result an EU fire class?

No. Different methods and classification systems are not directly interchangeable.

## Sources

1. Klyosov, A. A. (2007). Wood–Plastic Composites. Chapter 14; pp. 461–491. — https://doi.org/10.1002/9780470165935
2. DIN Media — EN 13501-1: reaction-to-fire classification — https://www.dinmedia.de/en/standard/din-en-13501-1/292529605
3. Green Plank — product information and technical enquiries — https://greenplank.eu/