Tuliluokitus

Tuliluokitus is the Finnish term for the systematic assessment and labeling of the fire performance of construction materials, products, and assemblies. It covers two main aspects: reaction to fire, which describes how a material behaves when exposed to fire, and fire resistance, which indicates the ability to withstand fire while maintaining essential functions. The classification is used in building codes and procurement to ensure fire safety in structures.

The international framework most commonly used is EN 13501, with EN 13501-1 describing reaction to fire for construction products and building elements, and EN 13501-2 addressing fire resistance classifications. Classifications are typically expressed with letters such as A1, A2, B, C, D, E, F for reaction to fire, often accompanied by indicators for smoke development and flaming droplets/particles (for example s1, d0). Fire resistance classifications for assemblies are expressed as REI ratings, indicating load-bearing resistance (R), integrity (E), and insulation (I), together with a time period (for example REI 60).

In Finland, tuliluokitus is used to design, assess, and label building materials and systems to demonstrate compliance with national building and safety regulations. Tests and classifications are performed by accredited laboratories following national or European standards. The results guide architects and contractors in selecting materials appropriate for different fire compartments and risk profiles and facilitate certification and inspection processes.

Examples include plasterboards with specific reaction-to-fire classes or wall assemblies rated for particular fire resistance durations. Overall, tuliluokitus provides a standardized language for evaluating and comparing fire performance, supporting safer, compliant construction.