Storage and Drainage Board – Efficient Water Retention and Drainage Solution for Construction and Landscaping Projects

What Is Storage and Drainage Board？

A storage and drainage board is a multifunctional geosynthetic product designed to collect, store, and drain excess water in construction and landscaping systems. Made from high-strength HDPE or polystyrene, it features a dimpled or cup-shaped surface that allows temporary water retention while providing continuous drainage.

Commonly used in green roofs, podium gardens, basement walls, tunnels, and sports fields, it helps manage rainwater, reduces hydrostatic pressure, and protects waterproof layers.

Key Technical Specifications:

• Material: HDPE or polystyrene (PS)

• Compressive Strength: ≥ 200–1000 kPa

• Thickness: 10–30 mm

• Water Storage Capacity: 3–10 L/m²

• Drainage Capacity: ≥ 1.0–5.0 L/s·m

• Surface Type: Dimpled or hollow with geotextile filter (optional)

Applications of Storage and Drainage Board

The Storage and Drainage Board is ideal for a range of applications that require both water retention and efficient drainage. Key uses include:

Green Roofs and Roof Gardens: The board provides water retention for plants while allowing for effective drainage of excess water, preventing root rot and maintaining soil health.

Landscaping Projects: Used under garden beds and landscaping features to retain water for plant growth while ensuring that excess moisture is drained away efficiently.

Foundation Protection: Helps manage water around foundation walls, preventing waterlogging and hydrostatic pressure, which can lead to leaks and structural damage.

Retaining Walls: Reduces the risk of water buildup behind retaining walls by storing and draining water, protecting the wall from damage due to hydrostatic pressure.

Basement Waterproofing: Applied in basements or damp-proofing systems to prevent water seepage and moisture accumulation.

Stormwater Management: Effective in managing excess stormwater, allowing it to be stored temporarily and gradually released through drainage channels, reducing the risk of flooding.

 

The convex structure forms a continuous cavity layer, which quickly drains surface water and infiltration water, significantly reduces the hydrostatic pressure of the underground structure, and prevents water erosion. The cavity of the plate can temporarily store some water, and slowly release it to replenish the soil during drought, taking into account the drainage needs and ecological moisture conservation balance.

 

The high-strength support structure resists the heavy pressure of the covering soil, disperses local stress, and provides a flexible protective barrier for the waterproof layer and foundation. The modular design is easy to assemble and lay, adapting to complex terrains such as slopes and curved surfaces, greatly improving construction efficiency and system integrity.