Composite Drainage Geomat is a three-dimensional geocomposite built from a synthetic drainage core bonded to one or two layers of non-woven geotextile. The core is made from tough synthetic filaments formed into a grid pattern, U-shaped channels, or a pyramid structure, depending on the product configuration. Regardless of core pattern, the finished material is designed to channel water away from below-grade structures while keeping fine soil particles out of the drainage path.
The geomat sits between the soil or backfill and the structure's waterproofing membrane. Water moving through the surrounding soil enters the core, travels horizontally through the channel structure, and discharges into the connected drainage system before it reaches the wall. This relieves hydrostatic pressure on basement walls, retaining walls, and other below-grade structures, and protects the waterproofing membrane from punctures during backfilling. It's a practical alternative to traditional sand and aggregate drainage layers on civil and structural waterproofing projects.
| Property | Description |
|---|---|
| Structure | Three-dimensional composite: drainage core plus one or two geotextile layers |
| Core Material | Tough synthetic filaments |
| Core Pattern | Grid (waffle), U-shaped channels, or pyramid structure, depending on model |
| Porosity | Up to 95% |
| Flexibility | High, lies flat with no shape memory |
| Clog Resistance | Provided by non-woven geotextile filter layer(s) |
| Durability | Rot-proof, chemically resistant |
| Installation Conditions | Suitable for all weather conditions |
| Jointing | Fabric overlap included for joint connections |
Note: Roll dimensions, weight per square meter, flow rate values, and compressive strength data vary by product model and are available on request. Contact our technical team for a model-specific data sheet.
The core structure maintains continuous flow even under load, with a porosity of up to 95%. Water is channeled steadily toward the drainage outlet rather than pooling against the structure wall.
The non-woven geotextile filter layer keeps fine soil particles out of the drainage core. This keeps the collector drain from silting up over time and protects the structure from the moisture and cracking issues that come with a blocked drainage path.
The geomat combines compressive strength with high flexibility. It conforms to surface shapes during installation and lies flat with no shape memory, which keeps placement consistent against walls and foundations.
Positioned between the backfill and the waterproofing layer, the geomat shields the membrane from sharp rock, debris, and construction equipment during backfilling. This protection matters most in the period right after the membrane goes in, when it's most exposed to damage.
The material is lightweight, includes fabric overlap for jointing, and can be installed under all weather conditions. These properties keep installation straightforward on active job sites with tight schedules.
The geomat is rot-proof and chemically resistant, suited to long-term below-grade use. It also creates an insulating air gap against the structure wall, which contributes to the building's overall energy performance.
Basement walls, foundation waterproofing protection, and below-grade infrastructure drainage.
Retaining wall drainage layers, tunnel and podium wall drainage, and backfill drainage zones on civil engineering projects.
Roof garden drainage layers, green roof systems, and landscape terrace drainage.
It's a three-dimensional composite made from a synthetic filament drainage core, bonded to one or two layers of non-woven geotextile.
Water from the surrounding soil enters the drainage core and travels through the channel structure to the discharge system, rather than building up against the structure wall.
Yes. The geotextile filter layer keeps fine soil particles out of the core, which keeps the drainage path clear over time.
Yes. The geomat is designed as a cost-efficient alternative to traditional sand and aggregate drainage layers, while performing the same core drainage function.
Yes. The material can be installed under all weather conditions and is lightweight enough for straightforward handling on site.
It's used on basement walls, retaining walls, foundations, below-grade infrastructure, and roof garden or landscape drainage systems.
