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GT Membrane 500

GT Membrane 500 is a BBA-accredited impermeable geomembrane often used in the creation of attenuation tanks and damp proofing applications.

Manufactured from 100% recycled materials, GT Membrane 500 provides a cost-effective, reliable, and sustainable solution for a wide range of environmental and engineering applications.

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GT Membrane 500 used as a pond liner
BBA logo for GT Membrane 500

GT Membrane 500 is a standard impermeable membrane used for attenuation tank applications in SUDS. The membrane is completely wrapped around the modular water storage tanks to make them watertight, and then the whole tank, together with the membrane, is wrapped with a protection fleece geotextile to prevent the membrane from being punctured.

Please note that for higher-risk applications, a thicker geomembrane is usually required, however, this is usually specified by the client.

Installation procedure

Adjacent sheets should be overlapped by at least 150mm and should be bound with jointing tape. Double-sided and single-sided tape is available on request from our team.

Roll size

4m x 12.5m

Key attributes

  • Impermeability
  • Flexibility
  • Durability
  • Biological resistance
  • Manufactured using 100% recycled material
  • CE marked to EN 13967
  • BBA accredited

Applications

  • Small attenuation tanks
  • Damp proof membrane (DPM)
  • Emergency roofing
  • Garden ponds
  • Ground covers
  • Lining compost bins
  • Lining kennels and runs
  • Lining raised garden beds
  • Permeable paving
GT Membrane 500 used in a pond lining application

Resistance

Chemical Resistance

Resistant to attack by inorganic acids, alkalis and salt solutions which cause corrosion to metals and dilute solutions of detergent or bleaches.

Resistance to UV Light

Does not have UV stabilisation, therefore not recommended for long periods of exposure to sunlight. Weathering will not occur when installed in accordance with geotechnical engineer’s instructions.

Resistance to Water and Water Vapour

The Geomembranes and methods of jointing provide an effective barrier to the passage of liquid water and water vapour from the ground.

Resistance to Puncturing

Has a high standard of resistance when used in accordance with a suitable protection layer which should be specified by an engineer on site. Care should be taken to avoid damage during storage, handling and installation.

GT Membrane 500 Specification

Characteristic Test Method Units Standard 500MU
Visible defects EN 1850-2 - Pass/Fail Pass
Length EN 1848-2 m -0%/+10% 12.5
Width EN 1848-2 m -2.5%/+2.5% 4
Straightness EN 1848-2 - Pass/Fail Pass
Thickness EN 1849-2 mm -12.5%/+12.5% 0.5
Mass EN 1849-2 g/m² -12.5%/+12.5% 465
Tensile Strength - MD EN 12311 N/mm² >MLV 18.5
Tensile Strength - TD EN 12311 N/mm² >MLV 19.0
Tensile Elongation - MD EN 12311 % >MLV 325
Tensile Elongation - TD EN 12311 % >MLV 325
Joint Strength EN 12317-2 N >MLV 245
Watertightness 2kPa EN 1928 - Pass/Fail Pass
Resistance to impact EN 12691 m >MLV 30
Durability (artificial ageing) EN 1296 & 1928 - Pass/Fail Pass
Durability (chemical resistance) EN 1847 - Pass/Fail Pass
Resistance to tearing (nail shank) - MD EN 12310-1 N MDV 315
Resistance to tearing (nail shank) - TD EN 12310-1 N MDV 295
Resistance to static loading EN 12730 Kg >MLV Pass - 20kg
Water vapour transmission - resistance EN 1931 MNs/g MDV 890
Water vapour transmission - permeability EN 1931 g/m²/d MDV 0.23

Related case studies

Related case study

Ornamental Pond at Fallow Park

Fallow Park is an exclusive housing development on the outskirts of Cannock. A 1400m2 ornamental pond with green space was designed to enhance the development and provide a habitat for a variety of wildlife. The ground conditions and nature of the finished pond meant that an impermeable membrane would be required to line the pond.

Jessup Brothers
Jessup Brothers
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