| System Classification |
Type: Semi-Intensive |
This is the deepest, highest-performing option before entering full "rooftop garden" (Intensive) territory. |
Maximum Performance: Delivers superior results for clients needing the highest levels of stormwater and energy mitigation. |
| Stormwater Compliance |
Annual Water Retention |
50% to 90% of annual rainfall. |
Highest Retention: Provides the largest water storage volume, guaranteeing compliance even in the most demanding regulatory environments. |
| Max Single-Event Retention |
Retains well over 1 inch of rainfall depth in a single event. |
Unrivaled Flow Control: Critically delays and reduces peak runoff, protecting the building and municipal systems. |
| Structural & Logistics |
Saturated Weight |
Typically 35 – 55 lbs/ft² (Depends heavily on media composition). |
Verified Loading: Requires confirmation of the building's load capacity but provides a robust asset for minimal incremental weight. |
| Energy & Asset Life |
Thermal Performance |
Up to 95% reduction in summer heat transfer through the roof assembly. |
Maximized ROI: Provides the highest R-value insulation among green roofs, ensuring optimal HVAC efficiency and lowest utility bills. |
| Membrane Protection |
Doubles or triples the lifespan of the waterproof membrane. |
Long-Term Asset: The deep medium offers superior protection against thermal fluctuation and UV damage, greatly extending roof life. |
| Horticulture & Aesthetics |
Plant Palette & Health |
Supports a wide range of sedums, perennials, grasses, and small shrubs. |
High Diversity: Allows for a richer, more visually appealing, and resilient landscape, increasing property value and tenant appeal. |
| Installation Method |
Modular Tray System |
Pre-grown trays simplify installation, despite the depth. |
Quality Control: Ensures a uniform, high-quality vegetative layer is delivered and installed quickly. |
