Gas/Radon Resistant
(Identify the most appropriate RIW product(s) for your specific application from the text below and click on the product icon on the right to access the product page for more information and downloadable data sheets).
Along with soil types and water table levels, ground contaminates (Hydrocarbons) and gases such as Radon & Methane must be considered when deciding upon a waterproofing design.
Radon is a naturally occurring radioactive gas that is
found within certain areas of the country and maps are
available from the NRPB (see links).
It is generally accepted that any membrane that provides
a waterproof barrier will also provide and effective
barrier against radon. However, radon gas enters the
building via cracks and joints within the structure
and the membrane selected must be capable of accommodating
that movement with fracturing.
Landfill gas is produced by the breakdown of organic material. The principle components of landfill gas are methane and carbon dioxide, and only specifically approved membranes should be used to prevent the ingress of such gases.
RIW
LAC is suitable for protection against radon, but
all joints where differential movement may occur must
be sealed with RIW
Sheetseal 226 which is also an effective barrier
to Radon.
RIW Sheetseal GR has been independently tested and is an approved and effective barrier to Methane and Carbon Dioxide. This membrane incorporates an additional aluminium foil within the laminates.
RIW Structureseal is suitable for radon protection. It is also suitable for landfill gases provide it is pre-hydrated prior to casting concrete or backfilling.
RIW Toughseal is a waterproof membrane based on epoxy resins and therefore resistant to various chemicals and gases. It is therefore suitable for radon protection provided all joints subject to differential movement are reinforced where necessary with a RIW Flexiseal. RIW Toughseal will also be suitable for protection against hydrocarbons, but has not been tested for methane or carbon dioxide. |
