Perforated gypsum acoustical board with eight quadrants of 12 x 12 mm square perforations (16% perforated area), backed by an acoustical fleece. All four edges are tapered (4TE Technology) so joints can be finished flush. Supplied unpainted and can be painted to any colour. Reaction to fire is Class 1 as per BS 476.

Key features

• High sound absorption
• Seamless flush finish
• Immense design possibilities
• Suitable for green buildings
• All four edges tapered (4TE Technology)
• Backed with acoustical fleece

Applications

• Acoustic ceilings in halls and corridors (Gyptone range)
• Convention centres and auditoriums (project references: Vrindavanam Convention Centre, Crystal Convention Centre, Trivandrum)
• Used in projects such as NIIT, ILBS and NTPC (consultant testimonial)

Specifications

Nominal Size: 1200 x 2400 x 12.5 mm | Weight: 8.0 kg/m2 | Edge Detail: All edges tapered (4TE Technology) | Perforation Size & Type: 12 x 12 mm square (eight quadrants) | Perforation Area: 16% | Reaction to Fire: Class 1 as per BS 476 | Backing: Acoustical fleece (acoustic tissue on reverse) | Surface: Unpainted - can be painted to any colour | Glass Wool Density: 24 kg/m3 (as used in test) | Sound Absorption Coefficient (αs) - Quattro 41 + 50 mm Glass Wool (125/250/500/1000/2000/4000 Hz): 0.50/0.74/0.90/0.82/0.72/0.64 | NRC - Quattro 41 + 50 mm Glass Wool: 0.80 | Sound Absorption Coefficient (αs) - Quattro 41 + 50 mm Glass Wool + 300 mm air gap (125/250/500/1000/2000/4000 Hz): 0.75/0.83/0.71/0.72/0.80/0.72 | NRC - Quattro 41 + 50 mm Glass Wool + 300 mm air gap: 0.77 | Sound Absorption Coefficient (αs) - Quattro 41 + 50 mm air gap (125/250/500/1000/2000/4000 Hz): 0.10/0.32/0.64/0.72/0.71/0.52 | NRC - Quattro 41 + 50 mm air gap: 0.60 | Sound Absorption Coefficient (αs) - Quattro 41 + 300 mm air gap (125/250/500/1000/2000/4000 Hz): 0.44/0.64/0.62/0.63/0.63/0.55 | NRC - Quattro 41 + 300 mm air gap: 0.65

Standards: Reaction to Fire Class 1 as per BS 476 | GRIHA Product Catalogue listing (GRIHA V.3 criterion 29 & GRIHA V.2015 criterion 11; certificate valid 27 March 2018 - 26 March 2020) - listed as Gyptone BIG Boards