The JES series is a range of HDPE dimpled drainage sheet rolls for protecting structures and creating a continuous drainage path. JES15, JES20 and JES25 share the same 1,700 × 17,650 mm roll format, with different dimple heights, weights and mechanical properties. The roll format is useful on large roof, wall, top-slab and tunnel areas because it reduces the number of joints compared with small modular boards.
How a Dimpled Drainage Sheet Works
The formed dimples hold the sheet away from the adjacent surface, creating a cavity through which water can move toward the designed outlet. Depending on the project build-up, the sheet may also help protect waterproofing from direct contact with backfill or overlying materials. It is not a waterproof membrane by itself; the waterproofing, protection, filter layer and termination details must be designed as a complete system.
- Basement and retaining-wall drainage protection
- Green roofs, roof gardens and landscaped top slabs
- Road and utility tunnels
- Podiums, decks and other below-grade structures
JES Series Technical Comparison
| Property | JES15 | JES20 | JES25 |
|---|---|---|---|
| Height | 15 mm | 20 mm | 25 mm |
| Roll size | 1,700 × 17,650 mm | 1,700 × 17,650 mm | 1,700 × 17,650 mm |
| Material | HDPE | HDPE | HDPE |
| Weight | 950 g/m² | 1,100 g/m² | 1,200 g/m² |
| Pressure strength | ≥320 kPa | ≥280 kPa | ≥250 kPa |
| Bending strength | ≥330 N/5 cm | ≥380 N/5 cm | ≥400 N/5 cm |
| Vertical circulation capacity | ≥6.4 cm³/s | ≥12.8 cm³/s | ≥13.5 cm³/s |
| Puncture strength | ≥350 N | ≥400 N | ≥420 N |
| Elongation at break | 35% | 40% | 45% |
Installation Details
Prepare the substrate and complete the specified waterproofing before placing the drainage sheet. Orient the dimples as required by the project detail, overlap or join adjacent rolls according to the lap method, and terminate the sheet so soil and debris cannot block the drainage cavity. At walls, roofs and tunnels, coordinate fixings carefully to avoid unnecessary penetrations through waterproofing.
Production and Project Enquiry
For a model recommendation, send the application section, required drainage capacity, loading, waterproofing type, installation area and destination to our project team. Final selection should follow the engineer’s drainage and waterproofing specification.