A Sound Insulation System for concrete floors, robust resilient under screed layer system. Suitable for precast and solid concrete floors (minimum weight 300kg/m2). PropertiesLength: 10m. Width: 1.05m. Roll size: 10.5m2. Weight: 40.5kg per roll. Thickness: 5mm.Rolls per pallet: 14x rolls. Features Convenient - minimal change to traditional floor and ceiling construction. Resilient - JCW Impacta Rubber is a tough, puncture-proof, heavy material designed for the real building site. Acoustic testing & compliance JCW Impacta Rubber has been site tested for the new 2003 requirements: complies with RSD performance targets. Accepted by NHBC for A.D.E. compliance.