GGM Gasvoid

High strength, preformed geocomposites with a cuspated core hot welded to a geotextile filter designed to remove harmful gases from beneath gas membrane systems.

General information

Uniclass 2015

Pr_25_57_65_60 Plastics sheetsPrimary


J40/295 Geocomposite studded cavity drainage/ venting membrane

J40/47 High density polyethylene/ polypropylene studded cavity drain membrane

Specification data - Plastics sheets

Product Reference

GGM Gasvoid FF

For full footprint venting. Membrane selvedge to one side forms laps.

GGM Gasvoid PF

For partial gas venting.

Standard product features

Composite width:

915 mm.


  • Material: Gas-resistant HDPE.
  • Compressive strength: 250 kPa.
  • Thickness: 27 mm.
  • Tensile strength (MD/ TD): 20/ 20 kN/m.


  • Type: Non-woven, needle punched.
  • Material: Polypropylene.
  • Weight: 125 g/m².
  • Thickness: 1.2 mm.
  • Tensile strength (MD/ TD): 9.75/ 9.75 kN/m.

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