For protection against Carbon dioxide
Carbon monoxide
Hydrocarbon gases
Methane
Radon
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Delta Membrane Systems Ltd offers a range of waterproofing systems which also incorporate ground gas protection.

Many below ground construction projects require protection from both water ingress and gas contamination. Basements and below ground structures which need to be watertight and gas proof require further considerations at the design phase and throughout the project and the conditions of  both BS8102:2009 and BS8485:20015 need to be taken into account.

A Waterproofing Design Specialist will be able to interpret the requirements of BS8102:2009 and BS8485:2015 to produce a waterproofing design which incorporates both a waterproof and gas proof protection system.

Characteristic Situation Score and Hazard Assessment

If a site has been identified with a gas or hydrocarbon contamination it will have been given a Characteristic Situation Score. The Characteristic Situation Score is defined according to how severe the gas flow from the ground is.

All sites which have been characterised with a gas situation score will require a gas protection system and where identified, a waterproof protection barrier.

Methods of Ground Gas Protection

To achieve the minimum points score requires a combination of two or more of the following protection measures be used:

  • The structural barrier
  • Ventilation measures
  • Gas resistant membrane

Methods of Structural Waterproofing

There are 3 Types of waterproofing methods.

  • Type A Tanked or Barrier Protection. Cementitious or bitumen-based products applied internally, externally or sandwiched within the structure.
  • Type B Structurally Integral Protection. Reinforced or prestressed concrete designed through composite and integrated details such as water bars to be water resistant.
  • Type C Drained Protection. Cavity Drainage Systems which allow for water ingress but in a controlled fashion.

Evaluation of groundwater conditions, risk assessment and options for drainage outside the structure should always be considered.


Delta Membrane Systems Ltd offers a range of waterproofing systems which also incorporate ground gas protection.

Many below ground construction projects require protection from both water ingress and gas contamination. Basements and below ground structures which need to be watertight and gas proof require further considerations at the design phase and throughout the project and the conditions of  both BS8102:2009 and BS8485:20015 need to be taken into account.

A Waterproofing Design Specialist will be able to interpret the requirements of BS8102:2009 and BS8485:2015 to produce a waterproofing design which incorporates both a waterproof and gas proof protection system.

Characteristic Situation Score and Hazard Assessment

If a site has been identified with a gas or hydrocarbon contamination it will have been given a Characteristic Situation Score. The Characteristic Situation Score is defined according to how severe the gas flow from the ground is.

All sites which have been characterised with a gas situation score will require a gas protection system and where identified, a waterproof protection barrier.

Methods of Ground Gas Protection

To achieve the minimum points score requires a combination of two or more of the following protection measures be used:

  • The structural barrier
  • Ventilation measures
  • Gas resistant membrane

Methods of Structural Waterproofing

There are 3 Types of waterproofing methods.

  • Type A Tanked or Barrier Protection. Cementitious or bitumen-based products applied internally, externally or sandwiched within the structure.
  • Type B Structurally Integral Protection. Reinforced or prestressed concrete designed through composite and integrated details such as water bars to be water resistant.
  • Type C Drained Protection. Cavity Drainage Systems which allow for water ingress but in a controlled fashion.

Evaluation of groundwater conditions, risk assessment and options for drainage outside the structure should always be considered.


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  • DELTA® MS-500 BBA certificate
    DELTA® MS-500 BBA certificate
    9pp 256.41KB
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  • MemTech - Ground Gas Protection
    MemTech - Ground Gas Protection
    20pp 4.09MB
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  • MemTech - Ground Gas Protection
    MemTech - Ground Gas Protection
    20pp 4.09MB
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Delta Membrane Systems Ltd
DELTA House
Merlin Way
North Weald
Epping
CM16 6HR
Tel: 01992 523523
Fax: 01992 523250
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Structural combined gas and waterproofing systems