Pipes, Drainage & Ducting
GeoDrain GEO 10-400 – Heavy-Duty Geocomposite Drain for Deep Basements & Podium Decks (10 mm, 400 kN/m²)
Where the load stops being routine. The 10mm dimple profile carries a measured 4.11 x 10⁻³ m²/s of in-plane flow at 20 kPa - roughly 65% more drainage capacity than the 8mm core - while 400 kN/m² compressive strength handles foundation depths to approximately 10 metres. This is the grade specified for deep basements, multi-level parking structures and cut-and-cover work where both the water volume and the earth pressure exceed what a standard sheet was designed for.
Overview
CR GEO 10-400 is a high-performance geocomposite drainage sheet built on a 10mm HDPE dimple core with a 100 g/m2 PP filtration geotextile heat-bonded to the face. The step up from the 8mm profile delivers two things at once: substantially greater in-plane drainage capacity, and the compressive strength to keep that capacity available under deep-foundation earth pressure.
The measured numbers make the case. In-plane water flow capacity is 4.11 x 10-3 m2/s at unit hydraulic gradient under 20 kPa, against 2.48 x 10-3 m2/s for the equivalent 8mm sheet - approximately 65 percent more flow through the same wall area. Compressive strength is 400 kN/m2 with a manufacturing tolerance of plus or minus 10 percent, which is the class required for foundation applications to approximately 10 metres depth. Dynamic perforation resistance is 40mm and tensile strength is MD 13 kN/m with CMD 10 kN/m.
That combination makes CR GEO 10-400 the specification for deep basements, multi-level underground parking, cut-and-cover structures, tunnel walls and retained structures where both the water volume reaching the drainage plane and the earth pressure acting on it exceed what a standard sheet was designed to handle. It is equally applicable horizontally, where it distributes point loading from overburden across the full sheet area and provides a drainage plane beneath slabs and podium construction.
Assessed durability is 50 years in natural soils between pH 4 and pH 9 at soil temperatures below 25 degrees Celsius, with CE certification to DIN EN 13252 and Class E reaction to fire. The HDPE core resists groundwater chemistry, plant roots, cement and lime leachate, acids, alkalis, oils and solvents, and is not harmful to drinking water. Cover within two weeks of installation to protect against UV exposure. Supplied in 2m x 12.5m rolls, installed dimples toward the structure with the geotextile facing the soil and a minimum 100mm overlap at all edges.
- MaterialHDPE dimple core + PP filtration geotextile
- Structure10mm dimpled core with heat-bonded PP geotextile
- ColourBlack core with grey geotextile
- StandardCE to DIN EN 13252 · Class E fire · 50-year durability
- Roll Width2.0 m (±0.05 m)
- Roll Length12.5 m (±0.2 m)
Typical Properties
| Property | DS 8-600 | GEO 8-250 | GEO 10-400 | GR 20/200 |
|---|---|---|---|---|
| Type | Bare HDPE | Geocomposite | Geocomposite | Geocomposite |
| Dimple Height | 8mm | 8mm | 10mm | 20mm |
| Compressive Strength | 250 kN/m² | 250 kN/m² | 400 kN/m² | 200 kN/m² |
| Filter Layer | None | Bonded PP | Bonded PP | Separate PP |
| Roll / Sheet Width | 2.0m | 2.0m | 2.0m | 2.4m |
| Roll / Sheet Length | 20m | 20m | 12.5m | 20m |
| Perforated | No | No | No | Yes |
| Coverage | 40 m² | 40 m² | 25 m² | 48 m² |
| Water Storage | - | - | - | 6.0 L/m² |
| Primary Application | Protection | Standard drainage | Heavy-duty drainage | Green roofs |
Note: The above specifications represent the product family properties. Please refer to the product datasheet for individual SKU values.
Typical Applications
View all applicationsBasement & Foundation Waterproofing Protection
GeoDrain DS 8-600 is an 8 mm, 250 kN/m² bare HDPE dimpled protection sheet for basement walls, foundations and below-ground waterproofing systems. Installed outside the waterproofing layer, it provides mechanical protection and creates a defined drainage and ventilation cavity between the structure and surrounding backfill. Specify where an integral filter geotextile is not required.
Retaining Wall & Below-Ground Drainage
GeoDrain GEO 8-250 combines an 8 mm, 250 kN/m² HDPE drainage core with bonded PP filter geotextile for retaining walls, basement walls and foundation drainage. The geotextile filters surrounding soil fines while allowing water to enter the drainage core and discharge toward the designed subsoil drainage system, combining filtration, drainage and waterproofing protection in one layer.
Deep Basement, Podium & Underground Structure Drainage
GeoDrain GEO 10-400 is the heavy-duty drainage geocomposite for deep basements, podium decks, underground parking, tunnels and demanding civil structures. The 10 mm HDPE drainage core provides 400 kN/m² compressive resistance with bonded PP filtration geotextile and published in-plane flow capacity of 4.11 × 10⁻³ m²/s at 20 kPa, i=1, providing drainage and filtration under higher imposed loads.
Green Roof, Planter & Podium Landscape Drainage
GeoDrain GR 20/200 is a perforated 20 mm HDPE drainage and water-storage board for extensive green roofs, roof gardens, planter boxes and landscaped podiums. The system provides 200 kN/m² compressive strength, 6.0 L/m² water storage and 10.6 L/s·m drainage capacity, retaining useful moisture within the planted build-up while allowing excess water to discharge toward roof outlets
Compatible Systems
View all systemsGeoDrain DS 8-600 – 8mm HDPE Dimpled Drainage & Protection Board, 250 kN/m²
Bare HDPE dimpled drainage and waterproofing protection sheet for basements, foundations, retaining walls and below-ground structures. The 8 mm profile and 250 kN/m² compressive class provide a continuous protection and drainage cavity between the waterproofing system and backfill where an integral filter geotextile is not required. A high-volume choice for basement waterproofing protection, foundation drainage and general civil construction.
GeoDrain GEO 8-250 – 8mm Geocomposite Drainage Board for Basements & Retaining Walls, 250 kN/m²
Geocomposite drainage sheet combining an 8 mm HDPE drainage core with bonded PP filter geotextile for filtration, drainage and waterproofing protection in one layer. Designed for retaining walls, basement walls, foundations, planter walls and other below-ground applications where soil fines must be filtered before water enters the drainage cavity. Specify GEO 8-250 where an integrated filter layer is required.
GeoDrain GEO 10-400 – 10mm Heavy-Duty Geocomposite Drainage Board, 400 kN/m²
High-performance geocomposite drainage sheet for deep basements, retaining structures, underground parking, podium decks, tunnels and demanding civil works. The 10 mm HDPE drainage core provides 400 kN/m² compressive resistance with a factory-bonded PP filter geotextile and published in-plane flow capacity of 4.11 × 10⁻³ m²/s at 20 kPa, i=1. Designed for projects requiring higher load resistance and drainage capacity than standard 8 mm systems
GeoDrain GR 20/200 – 20mm Green Roof Drainage & Water Storage Board, 200 kN/m²
Perforated HDPE green roof drainage board for extensive green roofs, roof gardens, planter boxes and landscaped podiums. The 20 mm reservoir profile combines 200 kN/m² compressive strength with 6.0 L/m² water storage and 10.6 L/s·m drainage capacity, retaining useful moisture within the planted build-up while allowing excess water to discharge to roof outlets. Supplied in 2.4 m × 20 m rolls.
Installation Guidance
Standard Method Statement
Substrate Preparation & Product Selection – Confirm the specified GeoDrain grade, compressive strength and filtration requirement before installation. Waterproofing membranes and concrete substrates must be sound, clean and free of sharp projections or debris that could damage the drainage core. Complete and inspect waterproofing before covering it. For horizontal applications, confirm designed falls, drainage outlets and discharge paths before laying the drainage board.
Vertical Installation & Overlaps – Install DS 8-600, GEO 8-250 or GEO 10-400 in the orientation shown on the approved project detail, with geocomposite filter geotextile facing the soil or backfill side. Secure sheets using fixings compatible with the substrate and waterproofing system, keeping penetrations above the waterproofed zone wherever practicable. Form continuous overlaps between adjacent sheets and ensure geotextile overlaps prevent soil fines entering the drainage core. Do not leave open joints, displaced fleece or exposed drainage edges.
Drainage Outlet & Backfilling – The drainage layer must terminate into a designed collection and discharge system such as a perforated subsoil drain, drainage channel or approved outlet. Maintain an uninterrupted drainage path at the base of walls and around penetrations. Backfill carefully to prevent displacement, puncture or crushing of the sheet, avoiding direct impact from large aggregate or compaction equipment. GEO 10-400 provides 400 kN/m² compressive resistance where higher imposed loads require a heavy-duty drainage geocomposite
Green Roof & Podium Installation – Install GR 20/200 horizontally over the completed waterproofing/protection build-up with the reservoir and perforation arrangement positioned in accordance with the approved green-roof detail. Maintain free drainage to roof outlets and perimeter channels and install a suitable filter geotextile above the board before placing growing medium where required. GR 20/200 provides a 20 mm profile, 200 kN/m² compressive strength, 6.0 L/m² water storage and 10.6 L/s·m drainage capacity
Quality Assurance & Testing
Field QA/QC Checklist
- Delivery & Storage: Materials checked against the delivery note and conformance certificates, stored off the ground, covered from UV and kept clear of sharp objects and fuel.
- Orientation: Dimples placed against the structure or soil as specified; filter fabric facing the backfill.
- Laps & Fixing: Vertical and horizontal laps and fixing points to the manufacturer's guide; top edge closed with a finishing strip.
- Drainage Outlet: Base connected to the drainage pipe or outlet; falls checked.
- Backfill: Backfill placed in layers without tearing the fabric or crushing the board.
Manufacturing Standards
- ISO 12958 in-plane flow capacity
- Manufacturer installation guide
- CE to DIN EN 13252 · Class E fire · 50-year durability
Documents
Product Selection Guide
Compare performance properties across the entire category hierarchy before specifying.
Installation & Method Statement
Standard deployment procedures, installation specifications, and field application method statements.
QA/QC Site Checklist
Field quality control procedures, inspection checklists, and testing standards to verify installation integrity.
Technical Data Sheet (TDS)
Guaranteed minimum average roll values (MARV) and material testing properties.
Chemical Resistance / Accessories Guide
Chemical compatibility matrix and list of auxiliary materials needed for installation.
Projects Using GeoDrain GEO 10-400 – Heavy-Duty Geocomposite Drain for Deep Basements & Podium Decks (10 mm, 400 kN/m²)
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