GeoDrain Drainage Sheets
GeoDrain drainage sheets create a drainage path within civil and lining systems. We supply and install the drainage core, compatible filtration layer and collection details for the specified application.
GeoDrain LD™ - Leak Detection Systems
Engineered for double-lined containment systems, providing controlled leak detection, leachate flow and gas venting.
Applications
- Landfills & hazardous waste cells
- TSFs & heap leach pads
- Lined reservoirs & process ponds
Key Performance Characteristics
- High compressive resistance: ~700 - 1300 kPa
- High retained thickness under load (long-term creep controlled)
- In-plane flow capacity maintained under confinement
- Smooth interface for geomembrane contact
GeoDrain GR™ - Green Roof & Deck Drainage
Designed for horizontal drainage over waterproofing systems, combining drainage, storage and protection.
Applications
- Green roofs
- Podium decks
- Buried roof slabs
Key Performance Characteristics
- Dimple height: ~20 mm
- Water storage capacity: ~6.0 l/m²
- Drainage capacity: ~10.6 l/s·m
- Integrated reservoir + drainage function
GeoDrain CR™ - Civil Drainage & Protection Systems
General-purpose drainage and protection systems for subsurface and structural applications.
Applications
- Retaining walls
- Basement and foundation drainage
- Tunnel & underground structures
- Road and rail subgrade drainage
Key Performance Characteristics
- Compressive resistance: ~200 - 650 kPa
- Dimple heights: 8 mm - 10 mm
- High chemical and root resistance
- Continuous drainage void with optional filtration layer
ENGINEERING CHARACTERISTICS
GeoDrain™ systems are designed to provide:
- Controlled in-plane drainage under applied loads
- Retained void space under long-term compression
- Protection of geomembranes and waterproofing systems
- Resistance to chemicals, biological attack, and root penetration
- Durability >50 years in natural soils (pH 4-9)
Where filtration is required, bonded geotextiles provide:
- Soil retention
- Prevention of clogging
- Long-term hydraulic stability
SYSTEM CONFIGURATIONS
- Core Only → drainage + protection
- Single-Sided Composite → drainage + filtration
- Double-Sided Composite → separation + filtration + drainage
GeoDrain LD™ - Leak Detection Systems
| Property | LD420 | LD500 | LD750 |
|---|---|---|---|
| Core Material | HDPE | HDPE | HDPE |
| Core Thickness | ~5 mm | ~5 mm | ~5 mm |
| Compressive Strength | 700 kPa | 1000 kPa | 1300 kPa |
| In-Plane Flow (i=1) | ~2.0 l/m·s | ~2.1 l/m·s | ~1.2 l/m·s |
| CBR Puncture Resistance | ~300 N | ~300 N | ~500 N |
| Oxidative Induction (OIT) | >600 min | >600 min | >600 min |
| Carbon Black Content | 0.8-2.5% | 0.8-2.5% | 0.8-2.5% |
| Design Life | 100+ yrs | 100+ yrs | 100+ yrs |
| Typical Application | Standard LD | High Load LD | Deep Cell LD |
GeoDrain GR™ - Green Roof & Deck Drainage
| Property | GR20 |
|---|---|
| Core Material | HDPE |
| Dimple Height | ~20 mm |
| Compressive Strength | ~200 kPa |
| Water Storage Capacity | ~6.0 l/m² |
| Drainage Capacity | ~10.6 l/s·m |
| Service Temperature | -30°C to +80°C |
| Chemical Resistance | High |
| Primary Function | Drainage + Storage |
| Typical Application | Green Roofs / Decks |
GeoDrain CR™ - Civil Drainage Systems
| Property | CR200 | CR400 | CR650 |
|---|---|---|---|
| Core Type | HDPE Dimpled | HDPE + Geotextile | HDPE + Geotextile |
| Dimple Height | ~8 mm | ~10 mm | ~10 mm |
| Compressive Strength | 200 kPa | 400 kPa | 650 kPa |
| In-Plane Flow Capacity | Moderate | High | Very High |
| Geotextile Layer | Optional | Bonded | Bonded |
| Geotextile Permeability | ~80×10⁻³ m/s | ~80×10⁻³ m/s | ~80×10⁻³ m/s |
| Chemical Resistance | High | High | High |
| Design Life | 25-50 yrs | 50 yrs | 50 yrs |
| Typical Application | Light Civil | Structural Drainage | Heavy Duty Civil |
Applications and uses
We supply and install this product for:
- Subsoil and structural drainage behind retaining walls and below landscaped or paved areas.
- Drainage layers in designed civil and containment systems.
Why choose GeoDrain Drainage Sheets?
- Drainage paths within layered systems
- Core and filter combinations
- Supply and installation as a complete package
Installation and technical guidance
Design and procurement inputs
Specify in-plane flow at the design load and gradient, creep resistance, filter compatibility, connections and discharge points. A drainage layer requires a functioning outlet.
Provide the product grade or performance specification, drawings or BOQ, quantities, site location and required date. We will define supply, delivery and any agreed installation and QA/QC responsibilities in the quotation.
Request a product-specific quotation →Installation and QA/QC
Verify product identity, dimensional and relevant mechanical or hydraulic data, connections, filters and damage checks before covering.
Use the current supplied-product procedure and the approved project inspection plan. Define responsibilities and acceptance criteria before installation.
SELECTION · SPECIFICATION · PROJECT SUPPLY
Choose the right specification
Select a complete drainage route from collection through the material to a suitable outlet.
- Confirm whether the duty is drainage, leak detection, cable protection or structured-wall conveyance.
- Specify dimensions, loading, flow conditions, interfaces and the exact filter arrangement where needed.
- Coordinate connections, outlets, access and long-term performance for the actual application.
Define the quality records
Verify product identity, dimensional and relevant mechanical or hydraulic data, connections, filters and damage checks before covering.
For a useful quotation: send the grade or performance specification, quantity, location, required date and scope. Availability, delivery and installation responsibilities are confirmed in the quotation.
Why Geosynthetics South Africa
One enquiry coordinates the specified product, technical submission, delivery and any agreed installation and QA/QC scope. We define quantities, programme, responsibilities and handover requirements against your project.
Associated catalogue products
Applications
Related case studies
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Product documents and additional links
GeoDrain cuspated drainage sheets
Drainage and leak detection for lined systems
GeoDrain™ cuspated HDPE drainage sheets are engineered to provide controlled subsurface drainage, liner protection, and leak detection across containment systems, structural decks, and civil infrastructure. Systems are configured to maintain flow under load while integrating with geomembranes, geotextiles, and drainage networks.
Global brands
GSE geomembranes, MIRAFI geotextiles, Tensar geogrids and Eurobent GCLs, supported by grade-specific technical documentation.
Supply & installation
Product supply, site delivery, fabrication and specialist installation coordinated to the project specification and programme.
Documented QA/QC
Material traceability, installation inspections, applicable testing and handover records defined for the agreed scope.