The A1 classification for interior cladding is increasingly being sought after across Europe, particularly for public buildings where dry construction methods are used. The reason is related to the unification of fire protection tests and fire safety classifications, which has led to stricter national requirements for building materials and structural elements.
Fermacell Firepanel A1 is specially designed for these applications. A new composition and the use of non-combustible fibers have made this possible.
| Characteristic values | |
| Gross density | 1200 ± 50 kg/m³ |
| Bending force | > 5.8 N/mm² |
| Moisture equilibrium at 65% relative humidity and 20°C air temperature | 1.3% |
| Water vapor diffusion resistance coefficient (μ) | 16 |
| Thermal conductivity (according to DIN EN 12664) λ10,tr | 0.38 W/mK |
| Expansion/contraction in case of change in relative humidity (20°C) 30% | 0.25 mm/m |
| pH value | 7 – 8 |
