GAS PROTECTION SYSTEMS

EXPERT GAS MEMBRANE INSTALLATIONS

We install high-quality gas protection membranes from all leading manufacturers. Our team is experienced in all approved jointing methods, including hot-air welding and the use of specialist sealing tapes, ensuring a fully compliant and effective gas barrier installation.

NVQ Level 2 Installers

Leading membrane manufacturers

Independent validation available

The right protection for your site

The selection of the appropriate gas membrane is determined by the findings of the Ground Investigation Report or Remediation Strategy. These reports identify the presence and concentration of ground gases such as methane (CH₄), carbon dioxide (CO₂) and radon, along with factors such as gas flow rates and ground conditions.

Using this information, the site’s Characteristic Situation (CS) rating can be established, typically ranging from CS1 to CS6 in accordance with current guidance. The higher the gas risk, the greater the level of protection required.

Specifying your membrane

Once the CS rating has been determined, a suitable gas membrane and, where necessary, associated gas protection measures can be specified to achieve the required level of protection for the development. Factors considered when selecting a membrane include:

Gas resistance and permeability performance
Required protection score for the site
Compatibility with the proposed building design
Installation requirements and detailing
Manufacturer certification and testing standards

Membranes we install

Our operatives regularly install a wide range of industry-recognised products, including:

JUTA

JUTA GP1 Gas Barrier
JUTA GP4 Gas Barrier
JUTA GP5 Gas Barrier
JUTA GP Titanflex

Proctor

Proctor Protech GM Super

Visqueen

Visqueen Gas Barrier
Visqueen NF-400
Visqueen NF-500
Visqueen NF-600
Visqueen Radon Barrier
Visqueen Low Permeability Gas Membrane
Visqueen Ultimate HC Blok

Wykamol

Wykamol Quadproof Gas Barrier
Wykamol Quadproof Ultra Membrane

All of our operatives are qualified to NVQ Level 2 in Gas Membrane Installation, enabling us to install all grades of gas barrier protection safely, efficiently and in accordance with current industry standards and manufacturer requirements.

Independent validation & verification

To provide clients, developers, consultants and warranty providers with confidence that gas protection measures have been installed correctly, we can arrange independent third-party validation of membrane installations in accordance with current industry guidance, including CIRIA C735 – Good Practice on the Testing and Verification of Protection Systems for Buildings Against Hazardous Ground Gases.

Third-party validation provides an independent assessment of the gas protection system, ensuring that the installation has been completed in accordance with the design specification, manufacturer requirements and relevant industry standards. The validation process typically includes a review of installation details, inspection of membrane integrity, assessment of service penetrations and construction joints, together with the verification of any associated gas protection measures.

Working alongside experienced and suitably qualified independent validators, we coordinate the validation process throughout the project to help ensure compliance and minimise programme delays. This includes arranging site inspections at key construction stages, addressing any observations identified during the inspection process and providing the necessary documentation to support project completion.

Upon successful completion of the works, a comprehensive validation report can be provided by the independent validator, offering documented evidence that the gas protection measures have been installed in accordance with the approved design and relevant guidance. This report is often required by regulators, warranty providers and building control bodies before practical completion.

By incorporating independent validation into the installation process, clients gain assurance that the gas protection system has been installed correctly, reducing risk and providing confidence that the required level of ground gas protection has been achieved.

This collaborative approach helps ensure a smooth approval process while demonstrating that the installed gas protection measures meet the performance requirements of the development.