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1001 Rhode Island Ave NE

Green Roof > Portfolio > 1001 Rhode Island Ave NE

About the project

  • Date: September 14, 2022
  • Client: 1001 Rhode Island Ave NE
  • Address: 1001 Rhode Island Ave NE
This 4,096 SF Extensive Green Roof is the ideal, budget-friendly solution for structures with weight limitations (15-25 lbs/ft²). It provides essential environmental benefits, meets WQv compliance by retaining 40-60% of annual rainfall, reduces cooling costs by 10-20%, and protects the roof membrane from UV damage.
4” Extensive Green Roof (4,096 SF) Data

4” Extensive Green Roof (4,096 SF):
Key Performance Data

Category Metric / Estimated Data Client Value Proposition & Application
System Classification Type: Standard Extensive Green Roof
Most Budget-Friendly: Ideal where budget and structural capacity are the primary limitations; focuses purely on high-impact environmental performance.
Structural & Logistics Saturated Weight: Typically 15 – 25 lbs/ft² (Very lightweight).
Total System Weight (Saturated): 61,440 – 102,400 lbs (30.7 – 51.2 tons).
Stormwater Compliance Annual Water Retention: 40% to 60% of annual rainfall.
Meets Minimum Compliance: Effectively captures and retains smaller, more frequent storm events required for WQv (Water Quality Volume) credits.
Max Single-Event Retention: Retains approximately 0.6 to 0.75 inches of rainfall depth. ()
Energy & Asset Life Thermal Performance: Reduces HVAC cooling costs by 10-20% and blocks UV rays.
Urban Heat Island Effect: Surface temperature reduction of up to ().
Horticulture & Installation Plant Palette & Health: Limited to hardy, drought-tolerant plants, primarily Sedum cuttings and low-growing succulents.
Installation Method: Sedum Cuttings/Blankets over a drainage layer.