Karma Acoustic Overlay 23 is an overlay board designed to be laid above a timber deck to reduce impact and airborne sound transmission. It consists of 18mm T&G4 chipboard laminated to a 5mm closed cell polyethylene resilient layer. Benefits of Acoustic Overlay 23 Minimal height increase makes it ideal for refurbishments Quick and easy to install, offering savings in time and labour Non-load bearing partitions can be built off the floating floor. Suitable for use in loft conversions in accordance with Floor 4.d Type 2 (Scottish Section 5 “ Generic Internal Constructions) Technical Panel size: 2400 x 600 x 23mmWeight: 13.1 kg/m2Edge detail: T&G4