Knauf Knauf

Fire Protection Ceilings


FIRE Protection - RESPONSIBILITY FOR PEOPLE AND ASSETSNorbert Figge, Architect - Detlefsen&Figge Architecture firm

Fire protection means preventing the outbreak and spread of fire and smoke. The protection of health and life is of utmost importance to the people located within the building. That’s why specific requirements on fire resistance period and fire behaviour, based on a classification of the type and usage of the building, need to be fulfilled.

The objective is to provide the rescue and fire fighting teams with a sufficiently safe environment to evacuate the people from the building and, where applicable, bring any valuable objects to safety. The quality of the building materials used often plays a decisive role in determining whether a fire is able to spread unhindered or is contained at the seat of the fire and able to be extinguished quickly and successfully.

In the case of German public buildings, the properties of escape routes is regulated on the basis of the fire protection ordinances of the German Länder. These stipulate, for example, that the escape routes must remain intact and smoke-free for a specified period of time. They must not contain any flammable building materials or furnishings and must be segregated into individual fire zones. By rigorously adhering to the fire protection ordinances during planning and implementation, lives can be saved and material and intangible damages minimized.

AMF has been manufacturing special and certified fire protection systems for this purpose for several decades. AMF’s in-house and field technicians can provide support both in the planning and implementation phase of any building project that has fire protection requirements.


Structural fire protection involves classifying the suspended ceiling together with the soffit and the grid installation as a whole.

AMF THERMATEX ceilings achieve building component classifications of F30 to F120 depending on the type of soffit.

We have developed special fire protective ceilings for certain applications:

System F30 under gang-nail truss

System F90 under timber joists and trapezoidal decking

More about structural fire protection


Independent fire protection ceilings are tested for their fire resistance period irrespective of the type of soffit located above. They offer up to 30 minutes of fire protection from above and below:

F30 Uno / + Metal

F30 Dual + Metal

F30 Mono

More about indepentend fire protection

Fire protection parameters

Fire resistance classification

The EN 13501-1 standard is used to assess and classify building materials according to their fire behaviour.It sets the requirements for the materials on the surface of building components, e.g. ceiling claddings, i.e. their behaviour when in direct contact with radiant heat or flames.

The classification into combustible and non-combustible building materials doesn‘t describe the intrinsic behaviour of the material. The behaviour under fire load depends on the surface type and form, the presence of bonding agents, the processing technique used, etc. The certifications are therefore only valid for the building material or composite building material actually tested. Other compositions can exhibit a less favourable fire behaviour.

The A2-s1,d0 class corresponds to the national building-regulation term: “non-combustible”. AMF THERMATEX panels are classified as A2-s1,d0 in accordance with EN 13501-1 and are therefore “non-combustible”.
The material class is mostly printed on the rear of the panel as well as on the packaging labels.

Test certificates are available on request.

Building component classification

According to EN 1365-2 (fire load from “below”) and EN 1364-2 (fire load from “below” and “above”), not only are the suspended ceilings relevant to the achievement of the individual fire resistance classes but also the construction as a whole, i.e. the soffit located above, as well as installations such as light fittings, loudspeakers, anemostats, etc. that need to be suspended separately from the soffit.

The suspended ceiling and soffit should prevent the passage of fire and temperature for as long as possible. This time is called the fire resistance period, e.g. > 30 minutes.

This fire resistance period is defined in the fire resistance classes and determined on the basis of EN 1363-1 in consideration of the criteria for testing.

Fire resistance class Fire resistance period in minutes
REI30 > 30 min
REI60 > 60 min
REI90 > 90 min
REI120 > 120 min