Gas Dispersal Systems

Finesse Gasflow is a high strength, robust, preformed geocomposite that replaces pipe and filter stone by creating the void for the collection and safe venting of gases under buildings.

Gasflow consists of a cuspated HDPE orange core of special chemical resistance, bonded on one or both sides to a non-woven needle punched geotextile.

The core profile has dimples on one side only to maximise gas collection from the subgrade. The other side of the core is flat to provide added protection to the gas membrane. The geotextile is compatible with all types of soil and it has an extremely high inflow rate to ensure the gas is collected quickly. The high efficiency and minimal thickness of the Gasflow layer reduces the amount of excavation (and the disposal of contaminated subgrade below the finished floor level).