GGM 400 Gas Membrane
Application

  • Sites with medium to high level gas concentrations.
  • Sites with low to medium level hydrocarbon vapour contamination.
  • Ground bearing concrete slabs.
  • Suspended concrete slabs.

Description

Loose laid sheet membrane system designed to protect buildings against the ingress of methane, radon, carbon dioxide, hydrocarbon vapours and water vapour. The multi-layered laminate structure gives good strength, flexibility and installation properties. The upper surface of the membrane is coloured green.

Applications:

  • Sites with medium to high level gas concentrations.
  • Sites with low to medium level hydrocarbon vapour contamination.
  • Ground bearing concrete slabs.
  • Suspended concrete slabs.

Advantages:

  • Fully compatible with Preprufe and Bituthene membrane systems to form an integrated waterproof and gas resistant protection system.
  • Prevents the transmission of methane, radon and carbon dioxide gases.
  • Resistant to hydrocarbon vapours.
  • Fully bonded lap system.
  • Robust – resistant to on-site damage.
  • Good puncture resistance.
  • High tear and tensile strength.
  • Flexible – can accommodate normal building movements.
  • Weldable.

General information

Uniclass 2015

Pr_25_57_65_60 Plastics sheetsPrimary

CAWS

J40/140 Loose laid plastics or rubber sheet gas retardant damp proofing

J40/145 Loose laid weldable polyethylene gas retardant damp proofing

Specification data - Plastics sheets

Product Reference

GGM 400 Gas Membrane

Standard product features

Thickness:

400 µm.

Tensile strength:

>9 kN/m.

Tear resistance:

>350 N.

Moisture vapour transmission:

<0.03 g/m²/day.

Radon transmission:

<1x10-9 m/s.

Methane transmission:

<0.005 ml/m²/h/atm.

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