INTERDRAIN offers 2 drainage systems and a mixed drainage/sealing solution:
GM RANGE:
1. Configuration: geotextile (ground side) + geonet (waterproof side).
2. Functions: filter (geotextile) + drainage (geonet).
3. Must be accompanied by a continuous seal system.
GMG RANGE:
1. Configuration: geotextile (ground side) + geonet + geotextile (waterproof side).
2. Functions: filter (geotextile) + drainage (geonet) + sealant protection (geotextile).
3. Must be accompanied by a continuous seal system.
4. Reccomended where the earth fill is considerable (> 3m), to protect the seal.
GMFL RANGE:
1. Configuration: geotextile (ground side) + geonet + waterproof film.
2. Functions: filter (geotextile) + drainage (geonet) + sealant (polyethylene film).
3. It already has an incorporated seal.
4. It is reccomended to weld the film to achieve a continuous seal.
Long-term behaviour:
Comparision between INTERDRAIN and honeycomb geocomposite (mid-range "eggbox").