Gas Venting Systems

These CMS products help to prevent the accumulation of hazardous chemical gases beneath sites built on contaminated land.

Geocomposite Venting Layers- CMS Geoflow Gas Vent
As a high strength geocomposite material, GasVent can be used with active and passive venting systems to remove gases such as radon, methane and carbon monoxide from base slabs below buildings. GasVent is a preformed material, and as a result has approximately six times the flow performance of 20mm gravel ballast.

A full range of gas venting accessories are also available from CMS including collector pipes, ground level vent units and telescopic wall vents.

Modular Venting Layers- CMS GasVoid 52
Designed to create large flow void space below structures built on contaminated land, this modular polypropylene product is a lightweight, but heavy duty void matrix. Easy to install, GasVoid 52 is best used in conjunction with filtration geotextile and gas barrier membrane layers.