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GM-FF Floating Floor Underscreed Acoustic Insulation

GM-FF Floating Floor Underscreed Acoustic Insulation
Product Code: FF06-075
Availability: Contact Us POA
Download Description: For Registered Users Only
Price: Request Quote

GM-FF Floating Floor Underscreed Acoustic Insulation

  • Studios, gyms, industrial and residential.
  • Can be used to exceed Building Regs.
  • Suitable for timber or concrete sub-floors.
  • Can be used under timber, light-weight or full-weight concrete.

92% Recycled

  • Easy Installation.
  • Significantly increases airborne and impact sound insulation.
  • Low natural frequency down to 15Hz.
  • Can be loaded up to 7kg/cm² (690 kPa).



GM-FF is made using compressible elastomer technology. Compressible elastomers are a completely different technology than vulcanised rubber. Typically vulcanised natural rubber or neoprene is defined as incompressible. This means it requires high loadings in order to obtain some static deflection to provide for any vibration isolation. These types of systems simply do not work in buildings where high floor loading is neither available or desirable. In a similar manner, fibreglass isolators are comprised of rigid particles which loose elasticity when compressed. The end result of this material is a dramatic degradation of performance over time.

Compressible elastomer technology allows for low natural frequency at low loads. Due to the suitability of low loading, the rubber can cover the entire floor surface, providing consistent performance throughout. Vulcanised rubber isolator systems require the isolators to be carefully positioned and extra isolators are often needed depending on weight and position of equipment. This requires additional layout planning, installation and costs.

GM-FF is supplied with a moisture barrier. There is no need for any plywood formwork the material is simply rolled out, with joints taped. The concrete can be poured directly onto it. The only additional accessory required is an edge perimeter flanking isolation strip.

gm ff installation steps

gm ff cross section showing edge detail perimeter isolation stripgm ff cross section showing edge detail perimeter isolation strip

gm ff loading chart showing natural resonant frequency

gm ff natural frequency

gm ff penetration details for pipes and services

Technical Information
Tensile strength 240 kPa minimum
Elongation at break 60% minimum

@ 345 kPa=15% recovery 85% min.

@690 kPa=20% recovery 85% min.

Type A hardness 30 durometer
Temperature stability -40°C to +115°C


Type Finish Subfloor Rw Ln,w ΔLw Report
FF25 13+10mm plywood 150mm concrete slab 57 55   5014147
FF06 60mm screed 140mm structural concrete 59 52 26 F289-41701
FF10 60mm screed 140mm structural concrete 59 51 26 F292-41702
FF17 60mm screed 140mm structural concrete 60 49 28 F293-41702
FF25 60mm screed 140mm structural concrete 61 47 30 F296-41702
FF25 100mm concrete 140mm structural concrete 70 45 32 F943-41992
FF50 100mm concrete 140mm structural concrete 72 43 35 F920-41970
FF75 100mm concrete 140mm structural concrete 73 41 36 F921-41970
FF25 2x12mm plywood 200mm concrete slab 60 53   B3498.14>
FF25 2x13mm plywood 200mm concrete slab 63 49   B3498.15

 gm ff roll sizes and weights

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