Brand: Shanghai Lejing Building Materials Co., Ltd.
Model No.: LeJing-010
Place of Origin: Shanghai, China
As a Product Manager at Shanghai Lejing Building Materials Co., Ltd., I understand that poor drainage and insufficient water storage are two core pain points in modern construction and landscape engineering. You are not just buying a drainage board; you are investing in drainage efficiency, storage capacity, and long-term structural safety for your entire project. Manufactured from premium HDPE/PP resins, our drainage board delivers exceptional compressive strength, corrosion resistance, and installation convenience. Whether you are building a sports ground, a public building roof, or a park, our drainage board provides an efficient water management solution for your project. With over a decade of manufacturing experience, LeJing ensures that every drainage board meets rigorous international standards for water storage, thermal insulation, drainage performance, and durability.
| Parameter | Value |
| Material | HDPE / PP |
| Size | 50×50 cm |
| Thickness | 1 inch (2.54 cm) |
| Height | 2.0 cm / 2.5 cm / 3.0 cm |
| Width | 50 cm |
| Length | 50 cm |
| Surface Design | Pebble |
| Color | Black, White, Green |
| Weight per Piece | 1.2 – 2.4 kg/piece |
| Warranty | More Than 5 Years |
| MOQ | 25 square meters |
Our drainage board does not simply drain water; its unique structure enables both water storage and drainage functions. The cavity design of the drainage board provides ample water storage space, allowing rainwater to be retained for later plant irrigation during dry seasons. Meanwhile, its flow guide structure ensures rapid discharge of excess water, preventing from damaging building foundations or plant roots. This storage-drainage integrated drainage board is an ideal choice for green buildings and sponge city projects.
The cavity layer of the drainage board not only stores water but also forms a closed air gap. This structure gives the drainage board outstanding thermal insulation capabilities – on green roofs, it reduces heat loss in winter and lowers heat conduction in summer. With our drainage board, building energy consumption can be reduced by 10%-15%, while providing a more stable temperature environment for plant roots.
Produced from virgin HDPE/PP materials, our drainage board offers extremely high compressive strength and corrosion resistance. A single drainage board can withstand several tons of static load without deformation, making it suitable for high-load applications such as green roofs, parking lots, and sports grounds. Our drainage board has excellent UV resistance and maintains structural integrity even after long-term exposure or underground installation, with a service life exceeding 20 years.
Each drainage board measures 50×50 cm and features a snap-fit interlocking design, with 4 pieces covering 1 square meter. This modular drainage board requires no special tools and enables fast on-site installation – one worker can install 80-100 square meters per day. Compared to traditional gravel drainage layers, our drainage board saves 60% of installation time and 70% of transportation costs.
We provide not only drainage board products but total project solutions. Every purchase includes free online technical support, 3D model design, graphic design, and cross-categories consolidation (one-stop procurement of geotextiles, geomembranes, and other related products). Our 24-hour online service, along with on-site training and on-site inspection support, ensures your drainage board project runs smoothly from design through construction.
Project Background: A large commercial complex in downtown Shanghai planned a 5,000m² rooftop garden. The owner faced two major challenges: first, the roof had load limitations, making traditional gravel drainage layers too heavy; second, the project needed to meet sponge city rainwater retention requirements, with an annual runoff control rate of 75%.
Solution Provided: Shanghai Lejing recommended the 3.0cm height drainage board (LeJing-010), paired with lightweight growing media and a filter geotextile. The cavity layer of the drainage board provides approximately 8 liters per square meter of water storage capacity, while directing excess rainwater to a collection system. We also provided free 3D model design to optimize drainage board layout and drainage paths.
Installation & Results: The installation of 5,000m² of drainage board was completed in just 6 days. Monitoring data after one year of operation showed: the green roof achieved a stormwater runoff control rate of 78%, exceeding the sponge city requirement; summer roof surface temperatures were 12-15°C lower than traditional roofs; winter soil layer temperatures remained stable, improving plant winter survival rates by 25%. The owner has since listed LeJing's drainage board as a specified material for future projects.
Project Background: An international school in Singapore needed to renovate its artificial turf football field. The original drainage system frequently caused water pooling during the rainy season, leading to game cancellations and turf damage. The field measured 105×68 meters (approximately 7,140m²), and the drainage system was required to clear standing water within 30 minutes after a heavy rainfall.
Solution Provided: Shanghai Lejing recommended the 2.0cm height drainage board as the base drainage layer, paired with a high-permeability filter geotextile and artificial turf infill system. The void structure of the drainage board quickly collects and directs rainwater to perimeter drainage channels. Our technical team provided on-site installation training and inspection support.
Installation & Results: The drainage board and supporting system were installed within 10 days. After one year of use and multiple heavy rain events, the field has never experienced water pooling. During the most severe rainstorm, drainage was completed in just 22 minutes. The school's athletic department reported that field availability increased from 65% to 95%. This drainage board solution reduced the load by 40% compared to traditional gravel drainage layers while saving 20% in project costs.
At Shanghai Lejing Building Materials Co., Ltd., our relationship begins after the sale. We provide:
Free online technical support prior to and during installation
3D model design and graphic design to optimize drainage paths
Cross-categories consolidation – one-stop procurement of geotextiles, geomembranes, and more
On-site training and on-site inspection to ensure installation quality
24-hour online service for emergency troubleshooting
| Item | Details |
| Packaging Details | Pallet packaging, 4 pieces per square meter |
| Selling Unit | Single item |
| Single Package Size | 120×0.5×20 cm |
| Single Gross Weight | 32.000 kg |
| Delivery Time | 7-15 days, matching ship schedule |
| MOQ | 25 square meters |
Whether your project is a sports ground, a public building, a park, or a sponge city development, the drainage board from Shanghai Lejing Building Materials Co., Ltd. delivers efficient, reliable, and cost-effective water management solutions. Contact our product team today for a free 3D design consultation or a sample for trial installation. Let our drainage board build a solid "underground hydraulic engineering" foundation for your next project.
Shanghai Lejing Building Materials Co., Ltd. – Your Total Drainage Board Solution Partner
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