1 Maximum heights and fire resistance:
Maxiumum heights – calculated based on a limiting deflection of L/240 at 200 Pascals (0.2kN/m2).
The maximum heights related above is for fire resistance of system to meet project requirements of BS 476: Part 22: 1987 only.
For maximum heights in relation to meeting project requirements of BS EN 1364-1:2015, please consult Technical Services.
2 Acoustic sound reduction dB (Rw)
Systems tested or assessed in accordance with BS EN ISO 10140-1:2010+A2: 2014.
* Knauf Insulation Acoustic Roll
** Knauf Performance Plus is recommended as outer layer for areas requiring fire fighting lift shafts
Note: Systems for both fire resistance and sound insulation performances are for imperforate partitions, incorporating plasterboard with all outer joints taped and filled, in accordance with Knauf recommendations.