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Protech VOC Flex - East Calder

The new development of 2 residential properties at Lime Kilns, East Calder in Scotland has been provided with a high-quality VOC protection barrier in the form of Protech VOC Flex from the A. Proctor Group.

Prior to construction and in line with the guidance and legislation for brownfield site developments, an investigation of the site revealed the presence of historic VOCs. In full compliance with CIRIA C735 and the guidelines laid out in the British Standard 8485:2015 (+ A1 2019) and CIRIA C748, the geomembrane was installed by the specialist gas membrane contractor Structureseal Services. As laid out in CIRIA C735 the VOC geomembrane was thermal heat welded and all joints air lance tested in accordance with ASTM D4437-08 2013 in conjunction with the third-party validation engineer. The thermal heat welded joints were carried out by approved NVQ Level 2 gas membrane installers, including the installation of the A Proctor Group’s Provoid 25 cuspated geocomposite subfloor venting blanket to form a passive dispersal layer in conjunction with Provoid ground mounted gully vents to the perimeter of the houses. This combined achieved a “very good performance” passive venting installation fully compliant with BS8485:2015 (+A1 2019) Table 6.

Martin Taylor, Commercial Director of Structureseal Services commented, “we have successfully used Protech VOC Flex on several VOC vapour protection projects. It offers high-performance protection in compliance with CIRIA C748, is extremely robust and has many benefits which make it easy to install on site. One of these being that when the geomembrane is folded the product has “memory”, which enhances the speed, finished appearance and quality of the overall installation.”

The A. Proctor Group has over twenty years of experience in providing solutions for the safe development of brownfield land, and a range of ground gas protection products to make the development of these sites safer and easier. Following extensive research and development, Protech VOC Flex was introduced as a high-class performance VOC membrane, part of the Group’s comprehensive range of ground gas protection products. Protech VOC Flex is a 6-layer flexible proprietary reinforced VOC gas barrier suitable for use on brownfield sites that require protection from dangerous contaminants.

The A. Proctor Group’s expert design and specification advice allowed the project at East Calder on behalf of Concept Completed, to achieve a fully compliant design for ground gas protection measures for the project. Working with developers, specifiers and contractors the A. Proctor Group can provide safe, cost-effective and value-engineered solutions. Technical services include CAD detailing and project-specific recommendations utilising the latest guidance and ensure compliance with current legislation and standards including the BS8485:2015 (+ A1 2019) and CIRIA C748. Site Investigation Reports and Gas Monitoring Results can be reviewed and specialist advice can be provided to ensure full compliance and correct product selection.

Ground works project in Stirling

Protech VOC Flex



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