Very high performance stone wool ceiling tile. This product combines a smooth white surface with outstanding performance in the areas of sound absorption, fire reaction and humidity resistance. Perfect choice where high performance is a requirement, such as Schools, Offices and high humidity environments. The Rockfon Tropic tile has recently been re-branded from the former Rockfon Alaska product. This 600mm x 600mm ceiling tile suits a 24mm (standard) grid. Properties Tile length: 595mm. Tile width: 595mm. Tile thickness: 24mm. Ceiling grid: 600mm x 600mm x 15mm. Edging: tegular, reveal edge. Box quantity: 16x tiles. Box coverage: 5.76m2. Sound absorption: 0.95w / 500 Hz. Class A. Reaction to fire: A1. Light reflection: 86%. Fire protection Some sizes and edge details of Rockfon Tropic can be used with various Chicago Metallic grids and Rockfon systems to create a 30 and/or 60 minutes fire protecting ceiling in accordance with BS 476 Part 21 and Part 23. They can also be used to create a 30 minutes fire protecting membrane ceiling (integrity only) in accordance with BS 476 Part 22.