A façade is no longer merely an aesthetic feature. Its fire resilience plays a major role in determining how safe a building is. There is an increasing demand for façade materials that combine the warm appearance of wood with fire resilience and ease of maintenance.
The fire performance of cladding is becoming an increasingly critical consideration in design. Even when a building is effectively divided internally, fire can spread rapidly up the exterior, creating a cascading effect. At the same time, building use is evolving. A growing number of residential blocks house elderly residents or people with reduced mobility, for whom evacuation can be more challenging. Therefore a façade that resists ignition and limits flame spread therefore provides an essential extra margin of safety.
Highest fire class
All Rockpanel Woods designs are classified as Euroclass A2-s1,d0 as standard, making them virtually non-combustible and ensuring they do not contribute to fire development.
This aligns with the perspective of many architects who view regulatory compliance as the minimum standard. It’s notable that this higher fire class comes at no additional costs. Other materials, such as aluminium composite, HPL, or certain types of wood, often require extra measures or coatings to achieve comparable fire performance. Rockpanel Woods achieves fire class A2 without chemical fire retardants or additional treatments.
Basalt as a base
The high fire resilience of Rockpanel’s cladding stems from its material composition. The cladding is primarily made from compressed basalt-based rock wool fibres. Basalt is naturally non-combustible and maintains its stability even under extreme temperatures. With a low proportion of organic binder, the material’s reaction to fire is minimal. It does not ignite, contribute to the spread of fire, produce smoke, or release burning droplets. These performance characteristics are documented in ETA documents and Declarations of Performance (DoP).
Detailing matters
Fire resilience is not just about the choice of materials; the detailing of a façade also plays a crucial role in how fire can spread. Open joints, insulation materials, and fire stops all play a role in this. The use of fire-resilient cladding significantly reduces the risk. However, if a detail is not executed perfectly, the material itself serves as a critical safety buffer. This provides peace of mind throughout the design, construction, and use phases.
Designing without compromise
For architects, fire resilience can sometimes conflict with aesthetics. While there is a strong desire to use timber, the fire risks associated with real timber or timber battens are significant.
In this context, fire-resilient cladding offers an alternative with the appearance of wood without the drawbacks of weathering, post-treatment, or flammability. The high fire rating also provides designers with greater freedom, as additional measures can often be omitted. There is more scope to create aesthetically compelling designs without compromising safety.
Misconceptions and changing regulations
Rockpanel Woods is designed for optimal fire performance, yet it is often mistakenly compared to systems that rely on additional coatings or fire retardants. Furthermore, regulations continue to evolve and pressure from European directives is increasing to ensure that the ongoing wave of renovations is carried out in a fire-safe and compliant manner. As a result, future-proof construction is becoming an essential starting point.
Legislation and regulations
Treated timber may offer good fire performance on paper, but it requires additional treatment and maintenance, and its performance can degrade over time. Untreated timber has a predictable fire reaction, but reacts more quickly when exposed to fire, whereas Rockpanel maintains its stability and does not cause fire spread. It is also important to consider how different materials react within a façade in the event of a fire. With Rockpanel Woods, façades can be designed to combine the desired wood appearance with high fire resilience standards, without the need for additional measures, as is often required with timber.
Support for design and calculation
Rockpanel supports designers by providing documentation, test reports and fire safety information essential for building specifications and certification. Additionally, the company organises knowledge-sharing sessions and engineering consultations, allowing architects to assess their designs for fire resilience and material behaviour. By using materials in the highest fire class, designers are not only meeting standards but also ensuring the safety of occupants, the robustness of the building, and the longevity of the built environment.
