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The prime costs of land has meant that areas that were considered unsuitable for building in the past, such as brownfield sites and river alluvium flood planes are now considered as building plots.

Due to the natural emission of methane, carbon dioxide (and in some sites volatile organic compounds), there is a need to protect against an ingress of these gases into the building. 

The comprehensive design depends on location, level of gas emission and use of the building.

GDS Enterprise Ltd specialise in the manufacture of Gas Dispersal Units, which when used in conjunction with the venting blankets and the appropriate membrane; gives a total gas protection solution. 

For further information on the hazards and design guidelines, please refer to BS8485 and CIRIA149.

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