Isocheck Impact Mat acoustic flooring systems are designed for high levels of impact sound reduction through timber floors and staircases where an acoustic test is accepted for this type of system. (Not all authorities will accept a test on a soft floor covering when laid on a structural timber floor). Isocheck Impact Mat 300 is a 12mm tri-layer system with an Isopoli core. When installed and accepted as part of a complete party floor construction all systems enable a timber floor to meet the sound transmission standards of Approved Document E 2003 and subsequent amendments in 2004, 2010, 2013 and 2015. Commonly laid under timber laminate floors and on staircases, for refurbishments and upgrades that offer increasing degrees of airborne sound insulation with thickness and weight. . Isomass offer a free acoustic detail design service to Building Materials Nationwide Ltd customers, please visit the contac t us page to get in touch.