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• Features & Benefits
• Application Notes

Features & Benefits

• Multi-layer product design for maximum gas protection
• Polyester reinforcing grid for puncture resistance during application
• Loose-laid system for ease of application
• Suitable for installation with taped or welded lap joints
• Suitable for use with ground-bearing reinforced concrete or precast floor construction methods
• Can be used within masonry wall construction, eliminating the need for a separate damp-proof course
• Please refer to the Product Data Sheet for full details of:
  
  • Specification Clause
  • Standards Compliance
  • Properties
  • Application Instructions
  • Storage
  • Health and Safety

Application Notes

• Supplied as a 2m x 50m roll
• The membrane should be laid neatly without creases with the black surface facing upwards. Angles and corners should be formed with the membrane tucked well into angles and fully supported so that there are no voids underneath
• Laps and joints may be sealed with a minimum 100mm lap by welding with specialist equipment or by using Proofex Total Tape
• Welded joints should be undertaken by a Construction Skills NVQ Level 2 qualified operative using suitable specialist equipment
• All laps whether welded or taped should be integrity tested in accordance with CIRIA C735 as part of the installation assessment by an independent validation specialist in accordance with the validation plan issued for the project
• Protect the completed membrane installation adequately to prevent damage and puncture using rigid insulation board, a geotextile (300g/m2 minimum weight) or Proofex Protection Board prior to continuing with the construction work. Any areas of membrane that are not immediately covered should be clearly excluded from site traffic
• Where possible, services should be routed such that they do not pass through the membrane, thus minimising the number of penetrations where there is greater vulnerability to gas ingress in accordance with BS8485:2015+A1:2019. Where penetrations are unavoidable, the membrane should be sealed to the pipe or duct using Proofex Top Hats, Proofex Total Flashing Tape or Proofex 3000MR
• The membrane should be inspected immediately prior to concealment and, should any holes or tears be found, these should be repaired using patches of Proofex Total Tape or welded in place using Proofex Total Tape with at least a 150mm lap beyond the extremity of the puncture using the method detailed above with no gaps in the tape or welded seam. Alternatively patches of Proofex 3000MR or Proofex Flashing Strip may be used
• Where the membrane installation is required to contribute to a ground gas protection solution in accordance with BS8485:2015+A1:2019, the membrane installation should be assessed by an independent validation specialist in accordance with the project specific validation plan