SIGMA GPS Defender VOC Barrier (BS 8485-2015 Compliant VOC Barrier)
SIGMA GPS Defender VOC Barrier is an 18-layer high performance co-extruded polymer membrane of extraordinary quality and performance.
SIGMA GPS Defender VOC Barrier is made up of outer layers of both HDPE and LLDPE incorporating 2 layers of EVOH (Ethyl Vinyl Alcohol). Some permeation tests have not been able to detect anything passing through this type of membrane.
Due to the nature of the manufacture process, the membrane cannot delaminate as the layers are fused together during production and although multi laminate membranes incorporating and aluminium foil layer are good barriers to VOCs, there is potential for delamination and degradation.
SIGMA GPS Defender VOC Barrier is specifically designed to prevent the ingress of harmful ground gasses and Volatile Organic Compounds (VOCs) into new build structures.
SIGMA GPS Defender VOC Barrier 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.
SIGMA GPS Defender VOC Barrier is perfectly suited for use in commercial, industrial & housing projects where VOC vapours are present and the need for a highly flexible and robust membrane is required.
*This product cannot be immediately ordered online and are advertised at £0.00 (POA) due to shipping being calculated based on quantity and location.
Please contact us for a quotation.
01256 657 011 or Sales@straight2site.co.uk
SIGMA GPS Defender (1.65m X 61m Roll) (£ - POA)
It is recommended GPS Defender VOC Barrier 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.
GPS Defender VOC Barrier 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. SIGMA GPS pre-formed details, or Self-Adhesive Gas
Membrane are available for sealing around protuberances.