1806 D Street NE – Green Roof

About the project

Date: September 14, 2022
Client: 1806 D Street NE
Address: 1806 D Street NE

Project Information This 3,983 SF Modular Green Roof system provides cost-effective stormwater compliance by retaining 50-75%+ of annual rainfall. With a manageable saturated weight of 30-45 lbs/ft², it delivers significant HVAC savings (10-30%) and extends membrane life, making it an ideal performance-driven retrofit.

6” Modular Green Roof System (3,983 SF) Data

6” Modular Green Roof System (3,983 SF):
Key Performance Data

Category	Metric / Estimated Data	Client Value Proposition & Application
Stormwater Compliance	Annual Water Retention	50% to 75%+ of annual rainfall.
Stormwater Compliance	Max Single-Event Retention	Retains up to 1 inch of rainfall depth in a single event.
	Cost-Effective Compliance	Successfully meets local stormwater and GAR (Green Area Ratio) mandates while controlling project scope.
Structural & Logistics	Saturated Weight	Typically 30–45 lbs/ft².
Structural & Logistics	Total System Weight (Saturated)	119,490–179,235 lbs (59.7–89.6 tons).
Energy & Asset Life	Thermal Performance	Reduces HVAC cooling costs by 10–30% and insulates against winter heat loss.
Energy & Asset Life	Membrane Protection	Shields the roof membrane from UV damage and thermal expansion/contraction.
Horticulture & Installation	Plant Palette & Health	Supports diverse, resilient plants like sedums and perennials.
Horticulture & Installation	Installation Method	Utilizes pre-grown modular trays.