Euroclass System

You can take confidence from the fact that ROCKWOOL stone wool insulation is classified as A1 - the highest ranking available.

The European Reaction to Fire classification system (Euroclasses) is the EU common standard for assessing the qualities of building materials in the event of fire. This information is relevant for the United Kingdom and the Republic of Ireland.

ROCKWOOL insulation is non-combustible and can withstand temperatures of over 1000°C without melting.

 

Key points:

  • Compares ignitability, flame spread, heat release, smoke production and propensity for producing flaming droplets/particles etc.
  • Accepted by all European Union States 
  • Seven classification levels, from A1 to F
  • Products achieving A1 and A2 classification are considered as non-combustible*

 

1. Understanding if an insulation product is combustible

By law, all building insulation products subject to a harmonised EN standard must be CE marked - which means manufacturers must declare a fire performance classification known as a Euroclass rating for each of their products.

The Euroclass system determines a product’s fire performance by measuring a comprehensive set of characteristics, including ignitability, flame spread, heat release, smoke production and propensity for producing flaming droplets/particles. The classifications run from A1 to F and are defined with examples in the table below. In summary:

 

A1 and A2 are non-combustible*

B and below are combustible

 

Euroclass

Definition

Example Materials

A1

A2

Non-combustible

Stone wool, Glass wool, Concrete, Bricks

B

Combustible

Some Phenolic Foams

C

Combustible

Phenolic, some PIR

D

Combustible

PIR

E

Combustible

Flame Retarded EPS/XPS, PUR

F

Combustible

PUR

*A1 and A2 classified products are tested in accordance with the non-combustibility test EN ISO 1182 to identify that they will not, or significantly not, contribute to fire.

Furthermore A1 classified products are defined as 'non-combustible' in official government guidance to Building Regulations (all regions in the UK and in the Republic of Ireland). A2 products are also defined as non-combustible in Scotland.

 

2. ‘Class 0’ is NOT an indication of a product’s combustibility

Some combustible insulation products focus on a ‘Class 0’ rating when discussing fire performance. However, it is important to note that this limited classification refers only to spread of flame, and therefore has limited relevance to a product’s combustibility.

 

3. Where can Euroclass ratings be found?

The Euroclass rating of a product can often be missing from its data sheet, particularly for combustible products with poor ratings. However, manufactures are legally bound to report this information in the product’s ‘Declaration of Performance’ (or ‘DoP’).

The DoP is a legal document in which the manufacturer identifies the product and its intended use, indicating compliance in relation to the relevant Harmonised Product Standard and performance in relation to specified “essential characteristics”.

These documents should be freely available from the manufacturer’s website, but you may find that you have to specifically ask for a copy.

 

All ROCKWOOL DoP’s can be found here