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What is M classification?
The construction products evaluated are given an "M" classification indicating their flammability level.
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| CLASSIFICATION |
FLAMMABILITY |
EXAMPLE |
|
| |
| M0 |
Incombustible |
Steel, concrete, glass, stone |
|
| |
| M1 |
Non flammable |
Fire retardant treated wood, cardboard-covered plasterboards |
|
| |
| M2 |
Hardly flammable
|
Fire retardant treated wood, wool |
| |
| M3 |
Moderately flammable
|
Wood (depending on the thickness) |
| |
| M4 |
Easily flammable
|
Wood, plastic, cardboard |
This system is progressively disappearing due to the application of the construction products directive (CPD) which imposes the CE marking of these products. It is being replaced by the Euroclass system, recognised in all European Union countries.
What are Euroclasses?
Products are now classified as A1, A2, B, C, D, E and F (Euroclasses), completed by two additional classifications: s1, s2 and s3 defines smoke production, while d0, d1 and d2 defines the production of flaming droplets or particles.
The Euroclass of a construction product is therefore expressed in the following form: class-smoke index, flaming particles index.For example: B-s2, d0.
This Euroclass systems splits products into 2 categories (floor coverings and other products)
Therefore the classification depends on the combustibility of the products:
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| CLASS |
COMBUSTIBILITY |
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Class A1 and A2
(or A1FL and A2FL for floors,
the FL index meaning "floor")
|
Non combustible or limited combustibility products |
|
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Class B
(or BFL)
|
Combustible products with very limited contribution to flashover |
|
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Class C
(or CFL)
|
Combustible products with limited contribution to flashover |
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Class D
(or DFL)
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Combustible products with significant contribution to flashover |
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Class E
(or EFL)
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Combustible products with very significant contribution to flashover |
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