Gas Barriers

Effectively protect buildings from Radon gas penetration...

Corden EPS C02/Radon Membrane

Corden EPS CO2/Radon Membrane is a blown extruded blend of virgin polymer MDPE and LDPE (co-polymer). This blend gives the product immense strength, tear and puncture resistance when compared to ordinary DPM and other radon and CO2 membranes. Because of it’s integral strength, it has no need for reinforcement and thus makes it suitable for use as a proprietary gas/damp proof membrane, where resistance to puncture is key.
Corden EPS CO2/Radon Membrane prevents the transmission of unacceptable levels of harmful gases and due to the nature of it’s construction, the membrane overcomes problems associated with recycled products, such as imperfections.

Corden EPS Gas Tape

Corden EPS Gas Tape is a high quality, pressure sensitive,double sided butyl tape sealant. It provides good elasticity and adhesion to most building materials. Corden EPS Gas Tape is a high performance cross linked butyl rubber sealant, designed for use with gas resistant and vapour membranes and ancillaries such as DPC’s and DPM’s to retain integrity.

Corden EPS Geomembrane

Corden EPS Geovent

Corden EPS Geovent consists of a geotextile filter, thermally bonded on one side of a specially formulated orange cuspated HDPE (High Density Polyethylene) core, suitable for both active and passive venting systems. It’s main application is to remove gases such as Radon, Methane, Carbon Monoxide, Hydrogen Sulphide, etc. from below base slabs of offices, industrial and commercial buildings etc.

Corden EPS GR DPC

The properties of landfill gases are principally determined by the presence of Methane and Carbon Dioxide and any air that these gases are mixed with. The migration of these gases, as a result of diffusion and pressure flow, have increased in recent years and present a risk to both health and safety in new and existing buildings.
Radon enters buildings by airflow from the underlying ground. The two methods for sealing against Radon are the passive system, normally achieved by increasing the air tightness of the damp protection within the floors and walls, and an active system, which requires providing a powered radon extraction system by means of an integral fan.
Landfill gas can enter buildings through gaps around service pipes, cracks in walls below ground and floor slabs, construction joints and cavity walls. In areas where significant concentration of radon is present, sufficient protection can be provided by a well installed damp-proof membrane linked to the damp proof course or sealed to a cavity tray system. Dwellings in areas where higher Radon protection is required, should be supplemented by the provision of sub floor ventilation or depressurisation.
Corden EPS GR DPC provides protection against the ingress of these gases when sealed to both the slab membrane and dpc or cavity tray system. The use of factory welded preformed units, i.e. pipe penetrations, corners, stop ends and changes of level can be used as part of a gas protection scheme for either a passive or active system. Corden EPS GR DPC conforms to the current requirements for use as part of a gas resistant membrane system.

Corden EPS GRM

Corden EPS GRM is a high performance self adhesive waterproofing and gas resistant membrane constructed from a polymer modified bitumen compound and incorporating an aluminium carrier film. Corden EPS GRM will provide a continuous waterproofing/tanking system for basements and substructures. Corden EPS GRM should be used in conjunction with Corden EPS Prime to ensure a suitable bond.

Corden EPS Hydrocarbon Membrane

Hydrocarbons are colourless gases formed as a by-product of decomposing organic matter.
It is crucial that when gas protection is required, the site conditions, design and application are all taken into consideration to provide an impermeable membrane capable of surviving installation and subsequent traffic, to protect the most valuable asset “the building” against harmful gases that can cause future problems. The Corden EPS Hydrocarbon Membrane is a high quality, high density polyethylene (HDPE) produced from specially formulated, proprietary virgin polyethylene resin designed specifically for flexible geomembrane applications.

The Corden EPS Hydrocarbon Membrane has outstanding chemical resistance, mechanical properties, environmental stress crack resistance, dimensional stability and thermal ageing characteristics. The Corden EPS Hydrocarbon Membrane also has excellent resistance to UV radiation and is suitable for exposed conditions.

Corden EPS Methane Membrane GDB

Corden EPS Methane Membrane GDB10 is a universal barrier membrane for protection of new buildings against gas and damp penetration from the ground. Used as an over site membrane below floor slabs or suspended floors, in conjunction with Corden EPS Methane Membrane Cavity and Slab Edge Protection System, it provides a complete solution when installed in accordance with BRE Report BR 414 2001.

Corden EPS Methane Membrane

Methane is a colourless, odourless, flammable gas formed as a by-product of organic material breaking down. It is crucial that when gas protection is required, the site conditions, design and application are all taken into consideration to provide an impermeable membrane capable of surviving installation and subsequent traffic to protect the most valuable asset “the building” against harmful gases that can cause future problems.

The Corden EPS Methane Membrane prevents the transmission of unacceptable levels of dangerous gases and due to the nature of it’s construction and it’s resistance to damage, it overcomes problems associated with membranes of a lesser gauge.
The Corden EPS Methane Membrane is a high quality, very flexible polyethylene (LLDPE/VFPE) geomembrane produced from specially formulated, virgin polyethylene resin designed specifically for flexible geomembrane applications. The high uniaxial and multiaxial elongation characteristics of Corden EPS Methane Membrane make it very suitable for applications where a flexible, robust
membrane meets the specification.

Corden EPS Radon Membrane

Radon is a naturally occurring radioactive gas formed by the breakdown of uranium and radium.
It is crucial that when gas protection is required, the site conditions, design and application are all taken into consideration to provide an impermeable membrane, protecting the most valuable asset, “the building” against the gases that can cause future problems.
The acceptable level of Radon which has been regarded as the “safe” threshold until recently has been 200Bq/m3 (Bequerols per cubic metre) however, more recent studies have proven that exposure to radon at levels between 100 and 200Bq/m3 is as hazardous, prompting the following questions by The Health Protection Agency.