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Europe's testing and classification system for building products, which form the basis of the CE marking.

Classification of wood products according to EN13501-1:2007+A1:2009 involves initial typing tests according to test method EN13823:2010 for Euro classes B and C and specific for each type of wood as well as including mounting conditions, e.g. mounting on A2 substrate with or without air gap, or backing substrate of D-s2, d0 with or without air gap and so on. The test result is based on the classification of the product/wood classification according to classification standard EN13501-1:2007+A1:2009 within performance groups B, C, D, F.
Please note that the stipulations of construction documents shall not be in accordance with the classification standard EN13501-1.

Stipulation in construction documents shall be against harmonised product standards where the EU imposes a CE marking of solid wood and wood-based discs according to EN14915:2013 or EN13986:2004+A1:2015.

Fire class B and C regulations require mandatory CE marking and a performance declaration, known as DoP.

Common untreated wood is classified as D-s2, d0 according to CWFT. A large consideration is that application with another substance e.g. linseed oil, mineral oil may mean that the wood no longer reaches D-s2, d0, in the worst case, the product can be classified down to Euro class F.

When this or a similar product is prescribed as D-s2, d0, we recommend that downstream users request document that prove D-s2, d0.

More often, we hear how this type of product was painted in a workplace with fire protection paint, which is highly questionable protection as the fire protection drips from the panel when the oil melts, resulting in the paint falling to the ground.

IT IS IMPORTANT to understand that the fire report and classification report do not provide a certification of the product and the manufacturer's process.

Classification of the product only reflects the performance of the product, while certification, e.g. CE marking, is the official driving license where the entire manufacturing chain and control system are included via AVCP system 1 by notified body.

CE marking, on the other hand, does not mean that national building regulations are complied with, this must be checked against BBR and PBL.

PLEASE REMEMBER that industrial impregnated woods are always subject to compulsary requirements for CE marking and performance declarations when Euroclasses B and C are marketed.

Fire protection impregnated wood products without CE marking may not be marketed nor used in accordance with EU Building Products Regulation 305/2011.

Wood can never achieve Euro class A1 or A2 because wood is an organic combustible material. There are operators who claim to be able to do so, but this is untrue.

The highest classification wood can achieve is euro class B with additional index -s1 and -d0 written as B-s1, d0.

Product with performance C-s2, d0 is lower performance than Euroclass B, but higher than the wood's own performance, which is D-s2, d0 (CWFT).

Certain wood processing processes for enhanced durability can cause deterioration of fire-resistant properties in the wood, which may result in the wood falling within the framework to Euroclass F.

EURO CLASS B is the highest performance wood can achieve, with additional index -s1, s2, s3 and -d0, d1, d2.

The highest grade of wood is B-s1, d0. Index values -s, and -d are additions that indicate the production of a little or a lot of smoke as well as the presence of burning particles and droplets.

In terms of s-values, s1 is the lowest smoke development and is always provided indoors.

It is important to check whether the product's performance includes an air gap or just installation on the substrate.

EURO CLASS C: Building regulations provide for this mainly in smaller rooms, with a small number of people in the premises, private housing and in walls in combination with sprinklers.

EURO CLASS D: The wood's own natural performance i.e. reaction to fire according to CWFT.

EURO CLASS F: This performance is worse than natural wood, and in principle, it cannot be used where fire technology requirements are imposed. Certain processing processes against durability generate higher FIGRA than the wood itself generates, such as Euroclass D, and thus the performance of the product can deteriorate to be classified according to Euroclass F.

Euroclass table

Euroclass

Smoke class

Burning particles

Requirements according to

FIGRA

Product examples

Non-flammable

SBI

Small flame

W/s

A1

-

-

X

-

-

-

Stone, glass, steel

A2

s1, s2 or s3

d0, d1 or d2

X

X

-

≤ 120

Plasterboard (thin paper), mineral wool

B

s1, s2 or s3

d0, d1 or d2

-

X

X

≤ 120

Plasterboard (thick paper), fireproof wood

C

s1, s2 or s3

d0, d1 or d2

-

X

X

≤ 250

Wallpaper on plasterboard, fireproof wood

D

s1, s2 or s3

d0, d1 or d2

-

X

X

≤ 750

Wood and wood-based boards

E

-

- or d2

-

-

X

-

Some synthetic materials, but also resistance-impregnated (rot) methods occurs.

F

-

-

-

-

-

-

No fire class determined

SBI = Single Burning Item, EN 13823, main method for surface materials except floorings.
FIGRA = FIre Growth RAte, most important parameter for fire class according to the SBI method.