This Floormuffler 100 sq. ft. 30.75′ x 39″ x 2 mm Underlayment is a premium grade and ideal choice for most laminate, engineered and solid hardwood flooring applications. Self-sealing lip and tape system is lightweight, strong and flexible making it easy to install in nearly all conditions. The highest rated and most effective acoustic barrier on the market, provides the most effective through-the-floor and footfall noise reduction. Provides superior moisture protection and exceeds industry standards by over 700%. Proprietary Advanced Cell Technology, the most robust compression characteristics on the market help to insure the integrity of tongue and grooves.