Fire treatment of ceiling and wall systems

Each EU state has its own regulations with which building materials must comply. A distinction is made in this respect between construction materials and building elements such as facings and finishing materials.


The construction materials (dividing and or supporting walls and or ceilings), in the case of a fully developed fire, must keep the fire within the given compartment. This is called fire resistance and is measured in minutes.


For the building materials used as (decorative) finishings, such as suspended ceilings and wooden panelling used coating3inside the fire compartments (fire escapes and rooms and areas occupied by people), other regulations apply. These regulations concern the flammability behaviour, fire spread over a given surface and the level of smoke production. This is called fire retardance and is expressed on a fire classification scale.


The Derako® massive wooden systems are classed as facings and finishing materials, which means that our products have to meet the fire retardance criteria.


Fire Retardant Treatments

The timber used by Derako can be impregnated. After the impregnation process, the timber is dried.

 impregnation process

Impregnation process



CE Mark

fire graphMaterials that belong to the product group ‘facing and finishing materials’ have to be supplied with a CE mark and meet the European norm N13964. In order to iron out differences at the national level, E.U. regulators decided in 2003 to standardise all fire tests and bring them under a single set of European regulations. This has led to the introduction of the EN 13501-1 fire test, also known as the SBI test.


Testing environment EN 13501-1 (SBI test)

Various types of wood used in the Derako® system have all been tested according to the EN 13-501-1 norm (SBI test) and have a classification of B, s2 d0.
testing environment fire retardantTesting environment EN 13501-1
(SBI test)
B = Little or no contribution to the cause of fire
S2 = Limits development of smoke
d0 = No creation of flaming particles or droplets when subjected to fire


The fire retardant treatments are performed in accordance with the KOMO guidelines. In order to obtain full CE mark compliance, Stichting Keuringsbureau Hout (SKH) in Wageningen (The Netherlands) periodically audits the entire fire retardant treatment process.


Fire Regulations and Norms

International construction regulations set standards that building materials must meet in order to limit the chance of a fire starting and of one spreading quickly: All people present need sufficient time to leave the building.

Click here for the Classifications.