The MemTech R1 gas barrier offers a safe solution for protecting buildings and structures from radon gas. It is a flexible, loose-laid proprietary gas barrier constructed from a 3-layer, low-density polyethylene membrane reinforced with a polypropylene reinforcement grid. It has a distinctive red (top) and grey (bottom) as standard.

Radon is a naturally occurring radioactive gas formed from rocks and soil which is odourless, tasteless and colourless. It can be found everywhere in the UK and will resettle into any building or structure that is built over the source. High levels of radon and exposure to radon can cause lung cancer.

Key features

  • Offers full protection from radon

  • Three-layer, low-density polyethylene membrane

  • Extremely flexible for ease of installation

  • Robust to cope with all site conditions

  • Meets requirement of BRE 211:2015, Radon: Guidance on protective measures for new buildings

  • Suitable for new and existing structures

  • Independently tested by third party

  • BBA certified

  • High resistance to puncture

  • Also acts as a damp proof membrane

Product Details

  • Product Code: DMS 401

  • Roll Length: 50m

  • Roll Width: 2m

  • Thickness: 0.5mm

  • Tensile Strength (N per 50mm):
    -MD: 500
    -CD: 470

  • Elongation:
    -MD: 15
    -CD: 20

  • Nail Tear Resistance:
    -MD: 400
    -CD: 350

  • Radon Permeability (m²/sec): 4.3 x 10-12

  • Methane Permeability (ml/m2/day/atm): <514

  • Carbon Dioxide Permeability (ml/m2/day/atm): <514

Application

MemTech R1 Radon barrier should be installed on a 50mm blinding layer, either concrete or sand. Joints of the R1 are simply overlapped and then either heat welded or double sealed with MemTech gas tape and gas over-tape.