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Protech GM HM


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Protech GM HM Membrane is a modified HDPE, loose - laid, gas barrier that provides maximum protection from the ingress of Hydrocarbon liquids and vapours, VOC Contaminants, Methane, Carbon Dioxide and Radon into new developments. The membrane is fully compliant with the recommendations made in Ciria 665, BS8485 and 'The Local Authority Ground Gas Handbook' when installed in accordance with BRE 414.

  • Relatively flexible and easy to lay
  • Full range of accessories to ensure that the membrane is gas tight
  • Improved Impact Resistance and does not usually require protection layer when used under reinforced slabs
  • Large rolls available for reduced installation times
  • Compatible with the Provoid Gas Venting System
  • Smaller rolls available for reduced wastage on smaller schemes

Protech GM HM

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Protech GM Detailing


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Related Products

Protech GM Super


Reinforced LDPE gas barrier incorporating aluminium foil. Protects against the ingress of Methane, Carbon Dioxide and Radon.



25mm geo-composite void former. Used with air inlets and outlets to dilute harmful gases and meet site requirements.

Protech GM Plus


Reinforced LDPE loose laid gas barrier that protects against the ingress of Methane, Carbon Dioxide and damp.

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  8:30am - 5pm, Mon - Fri

  01250 872 261

  01250 872 727


  A. Proctor Group Ltd., The Haugh, Blairgowrie, PH10 7ER



"As a roofing contractor specialising in the larger, more prestigious, type of project, we prefer to use only the highest quality products. Therefore we use Proctor Roofshield wherever possible; we have been using it for over 15 years, together with their condensation risk analyses and U-value calculations."

Mike Camilleri - Camilleri Roofing



Innovative Construction Products for Over 80 Years.