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G2 EVA & G3 EVA Underlay

To ensure the highest and most professional result when installing GrandOak as a floated floor system, it is important that what is laid underneath your GrandOak floor is designed to last the test of time. Grand Underlay has a 2mm or 3mm EVA foam underlay, offering a higher density fabrication compared to standard closed cell foam. Ensuring thermal and acoustic standards are exceeded for residential and commercial applications.

Perfect for both concrete and timber subfloors, Grand underlay offers peace of mind with up to 200mm extra wide overlapped water resistant 100um PE film, ensuring your floor is protected for years to come.

Ask your local retailer for Acoustic ratings.


  • G2 EVA Underlay 20m2 rolls – 2mm x 1.1m wide
  • G3 EVA Underlay 20m2 rolls – 3mm x 1.1m wide
  • Density 110kg/m3


Diagram Legend

01  Grand Acoustic Underlay Overlap Width

02  Normal Underlay Overlap Width

03  PE Overlap Film

04  Plastic moisture barrier

05  2mm or 3mm EVA foam layer

06  High Acoustic standards

07  High Thermal standards

08  Water Resistant PE film