Drainage is defined as the collection and transportation of rainwater, groundwater or other fluids such as leachates and gases. Geosynthetic drainage systems are being increasingly used as a more effective and economic alternative to traditional granular based solutions. TERRAM drainage geocomposites are manufactured by laminating geotextiles, geonet cores and non-permable membranes to produce a composite product suitable for replacing traditional granular drainage systems.


TERRAM® geosynthetics are used extensively in critical structural drainage applications such as basements, bridge abutments and retaining walls, replacing porous concrete blocks, no-fines concrete and other conventional materials.

Typical applications include:
• Landfill Caps
• Retaining Wall Drainage
• Basement Protection
• Highway Drainage
• Verge Toe and Batter Drains
• Bridge Abutments

Geocomposite drains comprise two or three elements; a filter fabric, a free draining core and a filter fabric or impermeable membrane. They are purposely designed to replace 'traditional' drainage solutions such as low fines graded stone and are highly effective in the collection and conveyance of both liquids and gases.

They offer a low weight, easy to handle, factory controlled, environmentally friendly alternative to 'traditional' methods in a number of applications including road and structural drainage, green roofs, Sustainable Drainage Systems (SuDS) and in the collection and venting of landfill leachate and gases.

Design Considerations
• Soil conditions
• Hydrology
• Hydrogeology
• Load conditions



TERRAM Roads & Highway Solutions
Installing TERRAM geocomposite drains
RG4 & RG-SD19 Landfill cell side-wall drainage (Bryn Pica LFS)
1B1 - Area drainage beneath artificial playing surface (Portsmouth)
1BZ - Drainage to the rear of a retaining wall (Carluke Park & Ride)