3mm Acoustic Gold is an underlay designed for wood & laminate flooring that can be used with both concrete and wood subfloors. It features a built in vapor barrier for damp proofing, protecting your new flooring from moisture. In addition to this, 3mm Gold offers noise and impact reduction as well as thermal insulation properties. Conveniently suitable for both domestic and contract installations. Requirements: Barrier Pro X Tape is required to join the seams on this underlay. Available here at B&Q