Reaction to fire class A1 describes a product under the relevant classification conditions. It is an important consideration when choosing insulation, but it does not state the fire resistance time of a complete wall, roof or facade. Here is how to distinguish these properties and check the documents before ordering.
Reaction to fire class A1 — what does it mean?
A1 is the highest reaction to fire class under EN 13501-1. It identifies non-combustible products that meet the classification criteria. This classification concerns the product’s contribution to fire under the relevant assessment conditions; it is not a fire-resistance rating for a complete wall, roof or facade.
Why does this matter in practice?
Selecting A1 insulation can support a building’s fire safety strategy by limiting the contribution of the insulation to fire. Requirements depend on the building type, application and applicable regulations. The complete assembly, including linings, fixings, joints and fire barriers, must also meet the design requirements.
How to check before buying
The reaction to fire class should be clearly stated in the product’s technical datasheet and Declaration of Performance (DoP). Request these documents before placing a substantial order.
Technical datasheets, Declarations of Performance and supporting product documents are organised in one place. View documents
For a general overview of mineral wool insulation, see the EURIMA guide. Confirm the properties of the selected Eurowool product in its technical datasheet and Declaration of Performance.
