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Cetco Voltex GB-500 Gas and Waterproofing Barrier – 1.66mm x 10m

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Product Code: GB-500
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VOLTEX GB-500 is a high performance gas vapour and waterproofing barrier for underground structures. The membrane is designed for use as a gas vapour waterproofing barrier to resist radon, methane, carbon dioxide gases and water from landfill and naturally-occurring sources.

£447.00 incl. VAT
£372.50 excl. VAT

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High performance gas vapour and waterproofing barrier for underground structures. VOLTEX GB-500 is a membrane composite comprised of a 500 micron thick, 7 layer engineered film consisting of polyethylene and a EVOH barrier layer with integrated bentonite geotextile waterproofing tanking membrane. Along the two roll edges the two layers are not integrally bonded for 150 mm to facilitate ease of welding or taping the PE/EVOH geomembrane overlap and then overlapping the geotextile layer component.

VOLTEX GB-500 is designed for use as a gas vapour waterproofing barrier to resist the ingress of radon, methane, carbon dioxide gases and water into buildings from landfill and naturally-occurring sources. VOLTEX GB-500 can be installed on sites with passive or active sub-slab ventilation measures; used in conjunction with GEOVENT ventilation composite and relevant vent connectors as applicable. 

VOLTEX GB-500 can be used in both non-hydrostatic and hydrostatic conditions. VOLTEX GB-500 fully complies with the latest codes of practice for gases and water as published by BRE, CIRIA and BSI (BS 8485:2015+A1:2019; BS8102: 2009), and is suitable for use as a gas and water protection system for NHBC AMBER 1 and AMBER 2 site characterisations. 

Applications: 

VOLTEX GB-500 is designed for use as a gas vapour resistant barrier to restrict the ingress of radon, methane, carbon dioxide gases and water into buildings from landfill and naturally-occurring sources. VOLTEX GB-500 can be installed on sites where passive or active ventilation measures are required; used in conjunction with GEOVENT ventilation composite and relevant vent connectors as applicable. 

VOLTEX GB-500 can be used in both non-hydrostatic and hydrostatic conditions where protection against gases and water is required.

Size and Packaging: 

Standard roll size 1.66 m x 10.0 m.

Characteristic Test Method Unit Value
Physical Properties
Thickness EN 1849-2 mm 5 typical
Width EN 1849-2 m 1.66
Length EN 1849-2 m 10
Weight EN 1849-2 g/m² 3200
Hydraulic Properties of PE/EVOH 7 Layers Liner
Water tightness after artificial ageing EN 1296 (12 weeks); EN 1928 B – Tight
Water tightness against chemicals EN 1847 (28 d/+23°C); EN 1928 B – Tight
Mechanical Properties of PE/EVOH 7 Layers Liner
Resistance to static load EN 12730 kg 20
Tensile strength (MD) EN 12311-1 N/50mm 550
Tensile strength (CMD) EN 12311-1 N/50mm 400
Tensile elongation (MD) EN 12311-2 % 500
Tensile elongation (CMD) EN 12311-2 % 500
Puncture resistance ASTM D 4833 N 170
Resistance to tearing (nail shank) MD EN 12310-1 N 300
Resistance to tearing (nail shank) CMD EN 12310-1 N 300
Gas Permeability of PE/EVOH 7 Layers Liner
Methane transmission rate EN ISO 15105-1 ml/m² x day x atm ≤ 0.1
Radon diffusion coefficient D ISO/TS 11665-13 m²/s 7.1 x 10⁻¹⁴ (+-0.8 x 10⁻¹⁴)
Carbon Dioxide transmission EN ISO 15105-1 ml/m² x day x atm < 1.0
Water vapour transmission rate EN ISO 15105-3 cm³/m² x day x bar ≤ 0.1
Membrane Composite
Hydrostatic transmission rate ASTM D 5385 (mod) m 70
Peel adhesion to concrete ASTM D 903 (mod) kN/m min 2.6
Tensile strength (MD/CD) EN ISO 10319 kN/m ≥ 13
Puncture resistance EN ISO 12236 kN 2.5

Please see our Delivery policy page for full details of our delivery terms and conditions, including information on exclusions, geographical restrictions, third parties, and failed deliveries.

Delivery Timescales

We will endeavour to deliver all orders within 1-3 working days (subject to geographical restrictions). Please note, where delivery lead-times for individual orders may be subject to change, we will keep you informed directly by phone or email within 24 hours of your order being placed.

Deliveries will not be made on UK bank holidays, and in such cases will fall on the next working day.

Standard delivery hours are between 8am and 6pm, Monday to Friday. If you are not available to accept the delivery when it is attempted, then a failed delivery charge will be applied (see the Delivery page for full details).

Delivery Communications

We aim to dispatch and deliver all our products within their specified time frames. You will get notified by BaseTec via email when your products have been dispatched. This will include details of your order and the expected delivery time. BaseTec will contact you via email or phone if there are any delays in picking your order or after dispatch.

If any products are out of stock or unavailable at the time of ordering, the BaseTec team will contact you by phone or email to discuss your options.

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