www.owa.de premium OWAcoustic® Technical Data Material Mineral wool modern tiles Building material class A2-s1,d0 to EN 13501-1 Thickness 15 mm nom. Colour white Light reflection approx. 84 (ISO 7724-2, ISO 7724-3) Sound reduction* from 35 dB to 49 dB (Un-needled) from 31 dB to 49 dB (Needled) Sound absorption áw = 0.25 / NRC = 0.25 (Un-needled) áw = 0.55 / NRC = 0.55 (Needled) Moisture resistance up to 100 % RH Fire protection* up to F 120 (DIN 4102) up to REI 120 (EN 13501-2) * Dependent on system, soffit and other factors Surface pattern AquaCosmos® AquaCosmos® /0 Example OWAconstruct® System S 3e, corrosion resistant grid