A regular pattern of 12mm and 20mm round perforations at 66mm centres combine to give Class C sound absorption and aw up to 0.70. 19.6% perforated area.
Gypsum boards perforated with regular or random patterns with sound absorbent black tissue as standard. Provides a monolithic appearance ready for on-site decoration. Boards can be dry curved down to a minimum radius of 5000mm.