Euroclass Standards: Everything You Need to Know About Fire Classification for Construction Materials

Fire safety is a major concern in the construction and building sectors. Among the regulations in place, the Euroclass standard plays a crucial role in assessing the fire reaction of materials. Discover in detail this standard, the difference with the M1 fire-retardant standard, and the solutions Alfaflor offers to ensure project compliance with these requirements.

What is the Euroclass Standard ?

The Euroclass standard is a European classification system that evaluates the fire reaction of construction materials. Defined by standard EN 13501-1, it categorizes materials into different classes, from A1 to F, based on their fire behavior :

A1 : Non-combustible materials.
A2 : Slightly combustible materials.
B to D : Materials with increasing combustibility.
E : Easily flammable materials.
F : Materials that are either untested or do not meet the criteria.

This classification also considers two additional criteria :

s (smoke): The amount and speed of smoke production.
d (droplets) : The production of burning droplets or debris.

For example, a classification of B-s1,d0 indicates a material with good fire resistance, low smoke production, and no flaming debris projections.

Differences Between the French M1 Standard and the Euroclass Standard

France has traditionally used a national classification, NF P92-507, commonly known as the M classification, to evaluate the fire reaction of materials. This system is divided into five categories :

M0 : Non-combustible.
M1 : Combustible but not easily flammable.
M2 : Hardly flammable.
M3 : Moderately flammable.
M4 : Easily flammable.

The Euroclass and M1 standards are two separate classifications that assess the fire reaction of materials using different criteria. They coexist and are applied based on regulatory requirements for each project or sector. Some equivalencies exist between both systems.

For instance, an M1-rated material generally corresponds to B-s1,d0 in the Euroclass system. However, the Euroclass standard provides a more comprehensive evaluation as it includes additional criteria such as smoke production and flaming debris, offering a more detailed fire behavior assessment.

That said, there is no exact correspondence between these classifications. The equivalencies provided are for reference only, and only laboratory testing can accurately determine a material’s Euroclass rating.

Alfaflor’s Solutions for Euroclass Compliance

To meet Euroclass standard requirements, particularly for wood fireproofing projects, Alfaflor offers customized solutions :

Intumescent Varnish

Intumescent varnish is a protective coating that expands when exposed to heat, forming an insulating barrier. This thermal shield slows fire spread and enhances the fire resistance of wooden structures. Applying this varnish helps achieve high Euroclass ratings, such as B,s1-d0, ensuring improved fire safety.

Autoclave Treatment

Autoclave treatment involves impregnating wood with fire-retardant products under pressure. This technique ensures deep penetration of fire-resistant agents, enhancing the material’s durability against fire hazards. This process is particularly recommended for exposed or hard-to-reach wood elements, providing long-lasting and effective protection.

In addition to our solutions for Euroclass compliance, we also offer M1-certified fireproofing products, including: Eurobois, Eurotextil, Eurocarton, and Euroflor.

Since each project has unique requirements, we encourage our clients to contact us directly to discuss the best options for their specific needs. Our experts are available to provide personalized advice and ensure compliance with fire safety regulations. Contact us today.