EPS Evolution VOC –Gas and Hydrocarbon Barrier is a multi-layer, polyethylene membrane.

EPS Evolution VOC is specifically designed and manufactured to perform as a Methane, Carbon Dioxide, Radon, Ground Gas, VOC, air & Moisture, and Hydrocarbon protection system.

EPS Evolution VOC complies with the latest codes of practice as published by BRE, CIRIA (C748) and BSI (BS 8485:2015). Suitable for use as Ground Gas/Hydrocarbon protection for NHBC GREEN, AMBER 1, AMBER 2, and RED site characterisations.

EPS Evolution VOC Hydrocarbon Barrier is a multi-layer flexible membrane, with a unique core component which is designed and manufactured to provide a barrier to the most aggressive chemicals and to comply with current guidance on Hydrocarbons. 

Manufactured using the latest extrusion technology and drawing on our extensive knowledge and expertise in gas protection, we have developed a new membrane suitable in applications that are affected by Hydrocarbons. There is a common misconception that monolithic polyolefin barriers, such as HDPE and LLDPE are effective barriers to resist Hydrocarbons. This is an incorrect assumption, as Hydrocarbons will readily permeate through monolithic polyolefin barriers. 

The product is available in roll format, 2.0m x 50m, (other dimensions available on request) in Black and Silver colour. 

EPS Evolution VOC Hydrocarbon Barrier offers a safe solution for the protection of buildings and occupiers against all levels of hydrocarbons, methane, carbon dioxide and radon ingress. Typically, these are sites previously used as petrol stations, coalfields landfill sites, contaminated industrial sites, Fracking sites, and heavily contaminated sites. The membrane also acts as a damp-proof membrane. Due to the flexible nature, the EPS Evolution VOC Hydrocarbon Barrier also provides a flexible membrane suitable for various applications unlike rigid HDPE rich membranes. EPS Evolution VOC is designed to withstand the most aggressive environments. 

Testing has been completed in accordance with BS 8485:2015+A1:2019 and C748 to determine the permeation rates for Methane, Carbon Dioxide, and 

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Handling

Roll weights can be in excess of 20kg and hence appropriate care and equipment is required for unloading and handling. 

Storage

Rolls of EPS Evolution should be stored on stable/level ground and stacked not more than five rolls high, with no other 

material stacked on top. The rolls can be stored outdoors when packaged, but should be protected from exposure to UV. 

Installation

EPS Evolution VOC should be installed in accordance with the product installation guidelines, and in accordance with BS 8485:2015. 

Jointing and Sealing

It is recommended EPS Evolution VOC be heat welded where possible, with welding carried out by competent personnel with suitable qualifications in accordance with best practice, and guidance contained within BS 8485:2015. EPS Evolution VOC should be overlapped by at least 100mm. If taping joints, only suitable tape must be used, ensuring application with a silicone roller to remove trapped air. EPS pre-formed details, or Self-Adhesive Gas Membrane are available for sealing around protuberances. 

Accessory Products

A wide range of accessories are available for use with the EPS Evolution VOC Barrier.