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 barrier, 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.

• The effectiveness of polythene sheeting is being questioned, particularly when it is formed from recycled material.

• Should the industry be considering a more robust, virgin polymer material of greater thickness?

• In known radon affected areas, should the installed protective measures be inspected by Building Control Bodies?

• In known radon affected areas, should a percentage of newly built properties be post inspected?

• Would the use of a Radon Sump eliminate many of the problems caused by membrane failure? 

Product Specification

Corden EPS Radon Membrane Barrier is a co-extruded, co-polymer hybrid.

Physical Description 

Thickness: 300mu/1200 gauge
Weight: 276g/m2
Colour: Red and black. Co-extruded.
Standard roll width: 4m

Technical Performance

Tensile strength: 24mpa
CD: 21.5mpa
Elongation at max load: 1436% / 1600%
Dart impact strength: <1kg   
Low temperature flexibility: -70ºc no effect
Radon permeability: 6.7x10-12m2.s
Moisture Vapour transmission: 0.31g/m2/day

 

This blend gives the product immense strength, tear and puncture resistance when compared to ordinary DPM and other radon membrane barriers. 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 Radon Membrane Barrier 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.

Advantages   

• Suitable for use on sites contaminated with higher concentrations of Radon

• Co-extruded virgin co-polymer. Zero imperfections

• 4 metre wide uni-fold membrane

• Premium DPM/vapour barrier

• Extremely tough with excellent resistance to tear and punctur

• Compatible with vented systems

Placing

Corden EPS Radon Barrier should be laid in accordance with the BRE document, Radon: Guidance on Protective Measures for New Dwellings 1999 Edition, which states that attention to detail should be adopted when jointing and detailing. Lay onto a smooth or blinded surface free from hollows and foreign objects.
Inspect for damage and repair tears/holes with a piece of membrane sealed down with double sided butyl tape and secured down with lap tape.

Availability

Corden EPS Radon barrier is available in a standard roll size of  4m x 20m.

Ancillary Products

• Corden EPS Gas Tape

• Corden EPS Lap Tape

• Corden EPS Top Hats

• Corden EPS Radon Sumps

• Corden EPS GRM

 

    

1mm Polypropylene Lift Pit Liner
The Lift Pit Liner is a 1mm propylene/ethylene co-polymer geomembrane. Produced from a resin formulation designed to provide a premium quality geomembrane, which exhibits excellent flexibility, improved elasticity and resistance to puncture. These properties assure maximum multi-axial elongation to accommodate differential settlement. Polypropylene is ideal for geomembrane applications, and major benefits to installation are provided by a lower coefficient of thermal expansion and a wide temperature-welding window. Heat welding produces a homogenous membrane being totally impervious to water ingress. The product lends itself to applications where high/variable water tables, standing water and water creating hydrostatic pressure areas are in evidence.

Radon Membrane Barrier
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 barrier, protecting the most valuable asset, “the building” against the gases that can cause future problems.

C02/Radon Membrane Barrier
Carbon Dioxide is a colourless, odourless gas 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 barrier, protecting the most valuable asset, “the building” against the gases that can cause future problems.

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