Fire standardsThere are numerous standards that provide non-combustibility test methods such as British Standards (BS467: Part 4), ASTM Standards (ASTM E136), Australia Standards (AS1530.1) and others. Most of these standards use the test method from ISO standards (ISO1182) as a general guideline or reference in determining the non-combustibility of the product.
In Europe, an exercise of harmonising the different standards was carried out and the EN Standards, a new classification standard covering the primary areas of reaction to fire, have been implemented.
|EN Standards||BS476 Standard|
|A2-s3, d2||Limited combustible - not existing under the BS476|
|B-s3, d2||Class 0|
|C-s3, d2||Class 1|
|D-s3, d2||Class 2 & 3|
d2 - release of burning droplets
In the above classification, all construction materials (excluding floorings) are classified into one of the seven classes. The safest products are rated with A1, followed by A2 and B.
Rockwool insulation products have both the classifications of BS Part 4 and EN A1.
The video below explains the EU (European Union) reaction to fire standards and the fire properties of different insulation products.