non-combustibility and fire-resistance
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Grenamat AL is available in various surface finishes including the possibility of digital printing.
Grenamat AL is a non-combustible board made of expanded vermiculite and inorganic binder. It does not contain any mineral or glass fibers, asbestos or any other substance on the SVHC (Substances of Very High Concern) list published by the European Chemicals Agency (ECHA). It is therefore absolutely health and ecologically harmless.
They contain no reinforcement fibers. Compressing the material under high pressure produces a sufficiently strong plate. Residual board parts can be disposed of as normal construction waste. Grenama AL boards also have very good sound and thermal insulation properties.
Reaction to fire according to EN 13501-1: A1 (with tested surface finish A2 - s1, d0)
We supply acoustic tiles for various solutions of concert halls, recording studios, theaters, cinemas, etc. These acoustic tiles effectively absorb, reflect or disperse sound, thus achieving the required acoustic quality of the spaces. In particular, they reduce reverberation times and generally improve the listening conditions of the rooms.
Tiles are combined from individual acoustic elements and materials, which in the designed assemblies create their own interior lining of the room. The core consists of a non-combustible vermiculite board, and therefore these tiles are suitable for areas with a large concentration of people, where the emphasis is on fire safety.
The color scheme, the type of perforation and the type of tile material can be selected from a wide range of surfaces (CPL, HPL, veneer, foil, ...).
Types of acoustic panels and other information.
Grena a.s. designed and tested smoke and heat exhaust pipes from Grenamat AL boards, which are an ideal solution for assembly of these pipes because of their strength, flame resistance and easy machining.
We design these devices with fire resistance up to 120 minutes for individual smoke sections that are in the fire compartment. In case of fire, they ensure proper ventilation (heat and smoke removal), minimizing the risk to persons and property due to fire.
More information
It is a thermal insulation of carbon-fiber CFRP lamellas or sheets, so-called "wrapping" with non-combustible Grenamat AL boards with fire resistance up to 120 minutes.
The thermal protection of Grenamat AL boards is designed so that the resin that glues the slat to the concrete substrate is not heated for the required time.
Certified thicknesses of Grenamat AL boards are listed in the table according to the required fire resistance.
Fire resistance
Thickness of the board
EI 30
25 mm
EI 45
30 mm
EI 60
40 mm
EI 90
48 mm
EI 120
55 mm
Tolerances of boards:
- density ± 10% - thickness after sanding ± 0,3 mm- length and width ± 5 mm Grenamat AL in accordance with ČSN EN 13501:1, reaction to fire, class A1 - non-combustible