The exceptional fire resistance of Hebel comes from its behaviour in contact with flames. The physical properties of this material make it the ideal formula for fire protection:
Hebel is non flammable and incombustible. Its reaction to fire is nil. It makes no contribution to combustion. Hebel is a thermal insulant (due to its cellular structure). Hebel does not release harmful gases in the event of fire. Hebel is insensitive to the influence of temperature:
the material structure does not change; the material does not deform, so that flames or smoke cannot propagate and no openings that might let in fresh oxygen appear.
In addition, Hebel is a natural insulator: in the event of fire, there is no risk of the emission of toxic fumes due to the presence of synthetic insulation.
HEBEL cladding panels A 150 mm thick Hebel cladding panel has 6 hour fire resistance (360 minutes). However, the fire resistance of a wall is determined by the total wall concept (BS 76-21:1987). The fire stop walls section gives detailed explanations of the fire resistance of HEBEL fire stop walls. If you want additional information on our fire stop walls please consult our documentation (downloadable from the Downloads section).
HEBEL roof and floor panels Belgian standard NBN B 21- 004 “Reinforced autoclaved cellular concrete elements” does not cover the fire resistance of these elements. To avoid having to perform a fire test for all possible combinations of thickness, span and dynamic load for floor slabs, Xella refers to German standard DIN 4102 - Teil 4 to demonstrate the fire resistance of Hebel floor and roof panels. In accordance with this standard, floor panels to which a thicker coating is applied have 60 to 120 minute fire resistance. The reinforcement and coating of these panels are always determined as a function of the required fire resistance time and the thickness, span, dynamic load and deflection for these elements.
