HDPE Composite Drainage Board also known as plastic drainage sheets, these boards are widely used in green roofing and foundation drainage systems.<br/> Smart Drainage Design: Water is retained and drained within the upper dimples, while excess water is efficiently channeled away from roofs and foundations.<br/> Premium HDPE Material: Manufactured via high-pressure injection molding, the board features a robust 3D structure with strong support columns.<br/> Integrated Filtration: A non-woven geotextile layer covers the top, allowing water percolation while acting as a filter for water storage and drainage.<br/> Superior Performance: The composite plastic drainage plate boasts high porosity, remarkable horizontal drainage capacity, and high compressive strength.

Key Technical Advantages

High-Density Polyethylene (HDPE) Material: Manufactured from high-quality HDPE, offering excellent durability, chemical resistance, impact resistance, and long-term performance even under demanding outdoor and engineering conditions.

8–30 mm Thickness Options: Available in a wide range of thicknesses from 8 mm to 30 mm, providing an excellent balance of structural strength, flexibility, drainage capacity, and load-bearing performance for different project requirements.

Black & Green Color Options: Available in black and green to suit different project environments, installation requirements, and aesthetic preferences. Custom colors can also be provided upon request.

CE & ISO Certified Quality: Manufactured under strict quality-control procedures and compliant with applicable CE and ISO requirements, ensuring consistent product quality, reliable performance, and suitability for international engineering projects.

Excellent Drainage & Water Management: The specially designed drainage structure provides efficient water collection, drainage, and pressure relief, helping reduce water accumulation and improve the long-term stability of waterproofing and drainage systems.

Wide Range of Applications: Suitable for mining projects, reservoirs, dams, retaining structures, underground engineering, landscaping, park roads, roof gardens, and other drainage or water-management applications.

High Compressive Strength: Designed to withstand construction loads and long-term soil pressure while maintaining an effective drainage channel, making it suitable for demanding civil engineering and infrastructure applications.

Easy Installation & Long Service Life: Lightweight and convenient to transport, cut, and install on site. Its durable HDPE construction provides excellent resistance to moisture, corrosion, chemicals, and environmental aging, helping reduce maintenance requirements over the service life of the project.

Basic Info.

Technical Specifications

Conversion Reference: 350 N/100 mm ≈ 20.0 lbf/in · 600 N/100 mm ≈ 34.3 lbf/in · 100 N ≈ 22.5 lbf · 150 kPa ≈ 21.8 psi · −10°C = 14°F · 10 cm²/s ≈ 1.55 in²/s

Application Solutions

🌿 Greening Project: Comprehensive Drainage & Water Retention Solution
Challenges: In garage roof greening, roof gardens, and sports fields (football pitches, golf courses), heavy rainfall can easily cause surface waterlogging, leading to plant root rot and structural leakage. Additionally, traditional soil layers are heavy, and maintaining adequate soil moisture during dry periods is difficult.
Solution: Utilize the composite drainage board's integrated "drainage and water retention" structure. The dimple core quickly drains excess rainwater away from the root zone to prevent waterlogging, while the composite geotextile acts as a filter to stop soil loss. The cavities can also store a certain amount of water, providing a natural reservoir for plants during dry spells, ensuring lush growth and protecting the underlying waterproofing membrane.
🏙️ Municipal Engineering: Reliable Seepage Control & Structural Protection
Challenges: Large-scale municipal projects like landfills, subways, and tunnels face severe challenges with leachate or groundwater accumulation. High hydrostatic pressure can compromise structural integrity, while clogging of traditional gravel drainage layers can lead to system failure over time.
Solution: The HDPE composite drainage board provides a high-flow, anti-clogging alternative to traditional granular drainage. Its high compressive strength withstands heavy overburden pressures in landfills and deep tunnels. The integrated geotextile ensures long-term filtration, effectively guiding seepage water to collection systems while protecting the primary geomembrane from puncture damage.
🏗️ Construction: Foundation Waterproofing Protection & Thermal Insulation
Challenges: Basement walls and foundations are subjected to immense lateral earth pressure and hydrostatic pressure. Poor drainage can lead to water infiltration, mold growth, and degradation of the waterproofing layer. Furthermore, integrating drainage with thermal insulation often requires complex, multi-layered construction.
Solution: Install the composite drainage board directly against the exterior of the basement wall or foundation. It acts as a protective cushion for the waterproofing membrane, relieving hydrostatic pressure by channeling water downward to the footing drains. In roof and floor applications, the air gap created by the dimples also serves as an effective thermal insulation and ventilation layer, streamlining the construction process.
💧 Water Conservancy Project: Efficient Seepage Management & Slope Stability
Challenges: Reservoirs, lakes, and dams require precise control of internal seepage to prevent piping and slope failure. Fluctuating water levels and wave action can erode protective layers, while traditional drainage materials may degrade or shift over decades of submersion.
Solution: The chemically resistant HDPE material is ideal for long-term submersion in water conservancy projects. Placed beneath riprap or concrete linings, the composite drainage board safely collects and redirects seepage water, reducing pore water pressure within the dam or embankment. This significantly enhances slope stability and prevents internal erosion, ensuring the longevity of the water retention structure.

🚆 Traffic Engineering: Subgrade Drainage & Frost Heave Prevention
Challenges: Highway and railway subgrades are vulnerable to water accumulation, which softens the base and leads to settlement, potholes, and frost heave in cold climates. Rapid drainage is critical to maintain the bearing capacity of the roadbed under dynamic traffic loads.
Solution: The 3D composite drainage net provides a high-capacity, lateral drainage pathway within the roadbed or beneath the ballast. It rapidly intercepts and removes infiltrating surface water and groundwater, keeping the subgrade dry and stable. Its high compressive strength ensures it maintains its drainage cross-section even under the heavy, repetitive loads of passing trains and trucks, significantly extending the infrastructure's lifespan.