Triton TGS – GV25

Triton TGS – GV25 is a 25 mm thick single-sided geo-composite that provides a void beneath floor slabs which, when connected to air inlets and outlets, allows sufficient air changes to dilute gases (methane, carbon dioxide, radon and hydrocarbon vapour and liquid) to safe concentrations when designed correctly.

The membrane can be laid in strips at pre-determined centres or in a blanket as required, and being only 25 mm thick results in quicker installation when compared to a 200 or 150 mm blanket of stone. It is also extremely strong and flexible with a crush resistance of 250 kPa and large areas can be covered quickly. Can be laid horizontally and vertically to deal with awkward foundation arrangements. It will cope easily with settlement under the slab without compromising the system.

General information

Uniclass 2015

Pr_25_57_65_60 Plastics sheetsPrimary


D21/360 Geocomposite venting layers

F30/360 Gas resistant damp proof courses/ cavity trays

F30/54 Gas resistant dpcs/ cavity trays

Specification data - Plastics sheets

Product Reference

Triton TGS – GV25


Connector T-piece

Ground level gully vent box

Required to be set in 150 mm surround of no fines concrete. No vehicular trafficking should be driven over the vents.

Standard product features

Technical characteristics:

  • Roll (l x w): 50 x 0.45/ 0.90 m.
  • Thickness: 25 mm.
  • Crush resistance, 200 kPa for 100 h: 5% (maximum).
  • Intrinsic permeability (k): <1.2 x 10-5 m².
  • Ultimate compressive strength at yield: 225 kN/m².

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