About the project

  • Date: September 14, 2022
  • Client: 1810 Central Dr NE
  • Address: 1810 Central Dr NE
This 6,500 SF High-Performance Extensive roof is the ultimate solution for structural retrofits, weighing only 15-25 lbs/ft². It maximizes environmental benefit on load-limited buildings, achieving 40-60% stormwater retention for WQv compliance and cutting cooling costs by 10-20%.
4” High-Performance Extensive Green Roof (6,500 SF) Data

4” High-Performance Extensive Green Roof (6,500 SF):
Key Data

Category Metric / Estimated Data Client Value Proposition
System Classification Type: High-Performance Extensive
Lowest Structural Load: Ideal for retrofits and buildings with limited structural capacity, maximizing environmental benefit per pound of weight.
Structural & Logistics Saturated Weight: 15 – 25 lbs/ft2.
Total System Weight (Saturated): 97,500 – 162,500 lbs (48.75 – 81.25 tons).
Stormwater Compliance Annual Water Retention: 40% to 60% of annual rainfall.
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 100% of damaging UV rays.
Urban Heat Island Effect: Surface temperature reduction of up to ().
Horticulture & Installation Plant Palette & Maintenance: Restricted to the hardiest, drought-tolerant sedums and succulents.
Installation Method: Sedum Cuttings or Pre-grown Mat over a drainage layer.