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Powerbase VOC Barrier Green/Blue - 3m x 50m

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£994.61 Incl. VAT
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Product Description

  • Multilayered barrier membrane for methane, radon, CO2, hydrocarbons and volatile organic compounds (VOCs)
  • Independently tested to ISO 15105-2
  • Compliant to BS 8485:2015  CE Marking
  • High tear and puncture resistance
  • Available in rolls for joining on site
  • Prefabricated panels option for specified footprints
  • Also acts as a damp proof membrane


Weight: 475gsm
Thickness: 500mu
Tensile Strength: MD 435N/50mm / XD 430N/50mm
Gas permeability:
Benzene - 4000mg/m2/day
Toluene - 4000mg/m2/day
Ethyl Benzene - 500mg/m2/day
Xylene - 800mg/m2/day
Radon - 1.0 x 10-14m2/s
Methane - 0.140ml/m2/day/bar
CO2 - 3.010ml/m2/day/bar
Colour: Green/Blue
Standard size: 3.0 x 50m


VOCs are commonly found in man-made paints and solvents, adhesive removers and cleaning products. They are also found in fuels and are used in the production of some synthetic products including plastics.

The effects of exposure to VOCs on human health are far-reaching and some compounds are carcinogenic. The use of a barrier membrane such as Powerbase VOC dramatically reduces the permeation rates VOCs, rendering contaminated sites usable.

Powerbase VOC Barrier provides effective protection on contaminated land and brownfield site developments by preventing harmful gases migrating into buildings. Other applications include environmental protection, secondary containment, and water resource and groundwater protection.

Powerbase VOC is suitable for sites requiring NHBC Green, Amber 1 and Amber 2, and Red gas protection measures.


Typically, an impermeable barrier is designed in the foundations of the building over a high permeable ventilation layer. Hazardous gases and VOCs migrate up through the soil and collect under the membrane in a sump from where they are vented and safely dispersed into the atmosphere. The principal function of the gas barrier membrane is to prevent harmful gases from entering the building through cracks, construction joints and service openings in the floor slab. The membrane should cover the whole plan area of the structure to all external faces in order to seal the ground slab as well as any cavity walls and voids in hollow concrete block work.

Typical use is for covered installations with a low level of mechanical constraints and no risk of puncture or abrasion.

Powerbase VOC can be joined on site with hot-air/hot-wedge welding or (in certain applications) taped with Powerbond Double-Sided Jointing Tape. It is important to note that the shelf life of self-adhesive products is limited: usually between 6 months and 1 year when protected from direct sunlight and ambient temperatures above 30°C.

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Powerbase VOC Barrier Green/Blue - 3m x 50m

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