The Trojan Foil Back Underlay is a thermal efficiency-enhancing product that provides a vapor barrier, making it suitable for use under laminate and engineered wood flooring. It significantly reduces noise from wooden and laminate flooring, offering a coverage of 10m2 per roll. The underlay measures 2mm x 1m x 10m and has a Tog rating of 0.8, with an impact sound reduction of 23dB. It is not designed for use with underfloor heating and has a compressive strength of good. The product weighs approximately 1Kg.