Our green infrastructure solutions are proven to be highly effective best management practices (BMPs) for controlling runoff, managing water quality, and achieving municipal compliance.
- Volume Retention: Green roofs are engineered sponges, retaining between 50% and 90% of annual rainfall volume, depending on the system depth (4-inch to 8-inch).
- Peak Flow Reduction: By delaying and absorbing rainfall, green roofs significantly reduce peak flow discharge rates (often by 50%–90% during typical storms), mitigating local flooding and reducing the burden on municipal storm sewer systems.
- Compliance & Incentives: Our systems are designed to meet or exceed Water Quality Volume () retention requirements, helping clients qualify for local stormwater fee reductions and compliance credits.
- Water Quality Improvement: The growing media naturally filters and treats rainwater, removing heavy metals and suspended solids before any excess water is slowly released.
Green Roof System Comparison: Choosing Your Performance Level
| System Characteristic | 4-Inch High-Performance Extensive | 6-Inch Deep Extensive / Semi-Intensive | 8-Inch Intensive Modular |
|---|---|---|---|
| Primary Goal | Lowest Load & Cost-Effective Compliance | Optimal Balance of Performance & Weight | Maximum Performance & Amenity Space |
| Typical Saturated Weight | 15 – 25 lbs/ft2 | 30 – 45 lbs/ft2 | 35 – 55 lbs/ft2 |
| Structural Requirement | Minimal—Ideal for most retrofits. | Moderate—Suitable for most modern commercial buildings. | High—Requires verifiable structural capacity. |
| Annual Stormwater Retention | 40% – 60% | 50% – 75%+ | 50% – 90% (Highest retention volume). |
| Plant Palette | Sedum Cuttings/Mats (Hardiest species only). | Diverse Sedums, resilient Grasses, and Perennials. | Wide Variety (Supports shrubs, large perennials, and custom gardens). |
| Energy Impact | Excellent UV protection and cooling effect. | Strong insulation for year-round thermal benefits. | Highest R-Value and maximum HVAC efficiency impact. |
| Usability/Access | Non-accessible; designed for maintenance access only. | Non-accessible; designed for maintenance access only. | Accessible Rooftop Amenity Space. |
E Questions
Some frequently asked questions about this product
Suitable for flat or low-slope commercial, residential, and institutional roofs.
Depending on the area, installation can take 2–4 days.
Yes, E is designed to be installed over standard waterproof membranes.
Periodic weeding and seasonal checks; minimal effort needed.
Yes, it helps regulate indoor temperature and reduce HVAC loads.
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