Gas barriers and venting
PAGeotechnical's passive protection system comprises a gas barrier membrane, in combination with a ventilation system to remove gas.
A range of gas barriers is available, and PAG will be pleased to recommend the appropriate specification. The system provides passive protection without the need for monitoring or mechanical equipment and so is ideal for housing and small industrial units. For large installations or those requiring additional protection, please ask for details of PAGeotechnical active and supported systems.
PAG has developed a range of high quality products to provide both barrier and venting. Gas barrier can be supplied in preformed sections - especially useful to speed up installation on housing sites. Alternatively joining can be carried out on site.
PAG specialises in difficult-to-solve problems on housing sites. By looking at the site in its entirety and using combinations of single and multiple membranes and ventilation systems, many sites have been developed which would otherwise have been difficult or impossible. Please contact us early if you have such sites and we will be pleased to assist with everything from design, through planning and approvals, to managing construction.
Brochures:
Passive gas protection systems
Suspended beam and block floors
Gas barrier is laid over the structural floor and covered with a screed. The sub floor can be ventilated by air bricks.
Ground bearing concrete slab
The slab is poured directly on to the gas barrier, below which is a venting layer of 200 mm granular material, or PAG 25 void former, which provides the most effective venting and forms a more stable substrate. Ventilation paths must be provided from the venting layer to atmosphere via a trench with granular fill, or air bricks.
