Tuesday 20 October 2020  

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FIBRANgeo - from the centre of the earth towards building protection

FIBRANgeo - an environmentally friendly material

FIBRANgeo stonewool is a natural fibrous material, 100% recyclable.  It is produced in Greece, from minerals such as basalt, limestone, dolomite, and bauxite, raw materials which are 200 million years old.  The electric furnace method used for is production, being far more advantageous than the blast furnace commonly applied, enables the production of uniform stonewool fibres with excellent technical characteristics.  In addition, this innovative method of manufacture, ensures that the levels of polluting sulfur and nitrogen oxide (SOX and NOX) gas emissions are significantly lower than those of the blast method. 

  FIBRANgeo thermal protection around the year 

Due to its fibrous structure, FIBRANgeo stonewool captures warm static air, reducing the heat exchange between warm and colder surfaces.  The material's very low thermal conductivity coefficient and high thermal resistance provides excellent thermal insulation and assures improved comfort both in winter and in the summer. The properties of the material remain unchanged throughout its life cycle, contributing significantly to the reduction of buildings' energy consumption. Further, FIBRANgeo stonewool products insulating properties remain unchanged in high temperatures, capable of withstanding the high temperatures occurring in particular applications.

FIBRANgeo - sound insulation - sound protection

FIBRANgeo stonewool absorbs external noise, satisfying the requirements of Sound Insulation Regulations.  FIBRANgeo stonewool products present high sound absorption coefficient values and optimum air flow resistivity characteristics.  These properties provide increased sound reduction of construction elements and improved acoustic performance of spaces. FIBRANgeo stonewool is produced with facings for particular acoustic applications. Further, the material's rigidity, yet efficient resilience with very low dynamic stiffness, render FIBRANgeo stonewool the ideal choice for reducing impact noise transmission, in applications such as floating floors, etc.

FIBRANgeo - fire protection

FIBRANgeo stonewool products are non-combustible materials which maintain their properties in high temperatures, with maximum service temperature of 700ºC.  Its use in building, industrial and marine applications contributes majorly to the fire resistance of building elements, providing fire resistance of up to 120 minutes.  FIBRANgeo stonewool products constitute the key parts of fire resistant walls, floors, roofs, prefabricated panels, doors and other passive fire-protective systems.

FIBRANgeo CE Designation Code

All FIBRANgeo stonewool insulation products conform to the European Directive 89/106/EEC since 2004. In compliance with the above Construction Products Directive, all types of FIBRANgeo B stonewool products hold the CE marking. Further, they are in conformity with the European Norm EN 13162, which refers to mineral wool insulation products used in building applications. In accordance with the aforementioned European Standard, every insulation product acquires a designation code which declares its technical characteristics.

For example:

MW - EN 13162 – Ti - CS(10)i – Tri - PL(5)i – CPi – WS - WL(P) – MUi – SDi - AFri - Awi


• MW –Factory made mineral wool insulation material, manufactured from molten rock, slag or glass.

• EN 13162 – The European Standard number

• Ti – Thickness Tolerances. Classes for thickness tolerances from the nominal thickness (e.g. Class T4 : - 3mm + 5mm).

• CS(10)i – Compressive stress at 10% thickness deformation (kPa). The compressive stress measurement should be greater than the declared value.

• TRi – Tensile strength perpendicular to faces (kPa). Tensile strength is measured perpendicular to the surface of the board and should be greater than the declared value.

• PL (5)i – Point Load (N). Compressive force (applied on a small area of 50 cm²) at 5 mm thickness deformation. The measurement should be greater than the declared value.

•CPi – Compressibility (mm). The difference between the unloaded thickness dLand the loaded thickness dB. The measured difference should be less than the declared value.

• WS – Short Term Water Absorption (kg/m²). Partial immersion of the material in water for 24 hours. The water absorption should be less than 1 kg/m².

• WL(P) – Long Term Water Absorption (kg/m²). Partial immersion of the material in water for 28 days. The water absorption should be less than 3 kg/m².

• MUi – Water Vapour Transmission. Measured as the ratio ‘μ’ of water vapour diffusion resistance of the material to the resistance of an equal thickness of air. The measured coefficient ‘μ’ should be less than the declared.

• SDi – Dynamic Stiffness (MN/m³) at a particular thickness. Measured as the ratio s’ of dynamic compressive stress to dynamic change in thickness, and should belessthan the declared value.

• AFri – Air flow resistivity (kPa s/m²). Measured as the air flow resistance of the material and should be greater than 5 kPa s/m².

• AWi -Weighted Sound Absorption Coefficient. The value of the sound absorption coefficient ‘αw’ in the frequency of 500Hz, measured on the standard weighted sound absorption curve.


The thermal conductivity λD and the thermal resistance RD, as well as the fire classification, are also declared on the insulation product’s label.

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