Upgrei is an innovative impact sound insulation underlay for use as an under screed resilient layer on floors. Developed with cutting-edge technology, it is a high-performing acoustic mat used in the construction of very thick, high specification floors.

An extension of the Grei Acoustic Underlay, it is made from specially selected EPDM rubber granules which are bonded to a layer of polyester fibre. The combination of these two materials results in a product that has very high acoustic, thermal and mechanical performance capacity.

Upgrei is ideal for the impact noise and thermal insulation of any type of floor, especially where there is a need for high acoustic performance. A waterproof version – Upgrei PTB is also available. Impact sound reduction values of up to 32dB is possible using the Upgrei sound insulation mats. The resistant and flexible mat adapts perfectly to the surface base and, thanks to its self-adhesive border seam, it is extremely easy and quick to lay with precision.


  • High acoustic insulation levels (up to ΔLw32dB)
  • 8mm thick
  • Stable acoustic performance under high loadings
  • Thermal insulating
  • Eco friendly – made from recycled materials
  • Quick and easy installation
  • Suitable for use with underfloor heating
  • Contributes towards LEED accreditation in several areas
  • Impacta ProCurve equivalent

This information refers to Upgrei (with anti-stretch backing) and Upgrei PTB (with anti-stretch and waterproof backing)

DescriptionUnitStandardG8 PTB
Superficial Masskg/m²2.6
Dynamic Stiffnessmn/m³EN 29052-19
Impact Sound Reduction – ΔLwdBISO 140/8, 717/226
Impact Sound Reduction – ΔLwdBEN 1235432
Thermal conductivity coefficient (λ)W/m°KEN 126670.047