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Visqueen Low Permeability Gas Membrane

Visqueen Low Permeability Gas Membrane offers a safe solution for the protection of buildings against methane, radon, stythe (a gas commonly found from disused mines, also known as blackdamp), when installed in accordance with the relevant codes of practice such as BRE, CIRIA and the Chartered Institute of Environmental Health Ground Gas Handbook. It is a robust copolymer thermoplastic membrane; for ease of identification on site, the membrane is coloured yellow. The membrane is supplied in 4 x 12.5 m rolls and has a centre fold. It is flexible and is easy to install, and is also suitable for use as a damp proof membrane.

For Installation and test results please see our datasheet.

Quality and Environmental Assurance:

Visqueen's products are manufactured under a Quality Management System approved to ISO 9001: 2008; Environmental System 14001:2004 and BS OHSAS 18001:2007.

General information






Approved for use in NHBC Amber 1 and Amber 2 applications


Thermoplastic containing low-density polyethyleneLow density polyethylene (LDPE)


Refer to BBA Certificate

Uniclass 2015

Pr_25_57_65_60 Plastics sheetsPrimary


J40/120 Loose laid plastics or rubber sheet damp proofing

J40/140 Loose laid plastics or rubber sheet gas retardant damp proofing

J40/20 Loose laid plastics or rubber sheet damp proofing

J40/35 Loose laid plastics or rubber gas retardant damp proofing

Specification data - Plastics sheets

Product Reference

Visqueen Low Permeability Gas Membrane


Double Sided Jointing Tape

Blue butyl based strip adhesive.

Foil Backed Lap Tape

Single sided tape for securing laps in demanding conditions.

Gas Resistant Detailing Strip

Self adhesive strip for forming complex shapes and junctions.

Heavy Duty Protection Boards

For protecting membranes from damage from following trades.

Preformed Pipe Cloak (Top Hat) Units

For airtight seals around service pipe penetrations.

Preformed Unit

For junctions or complex details.

Zedex CPT High Performance DPC

Co-polymer thermoplastic dpc suitable for horizontal, vertical or cavity tray applications.

Standard product features


4 x 12.5 m as a centre folded sheeting.


500 µm (2000 gauge).



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