Grei is an advanced high performance...
Grei is an advanced high performance impact sound insulation underlayment for use under concrete floating screeds. Available in 5mm and 8mm thicknesses.
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Grei is manufactured from EPDM granules bonded to a protective anti-stretch backing. The acoustic performance according to EN 12354 for impact noise is up to ΔLw=30dB. Grei is ideal for use with underfloor heating systems and is available in 5mm and 8mm thicknesses. Grei 8 is a direct equivalent and exceeds the performance of Regupol E48 underscreed acoustic flooring.
|Impact sound reduction improvement (ΔLw)||5mm - 29dB 8mm - 30dB|
|Dynamic Stiffness||5mm -15MN/m³ 8mm -12MN/m³|