Waterfront, Washington, DC
Completion Date: Fall 2009
Roofmeadow Network Contractor: Tilson Group
The Waterfront building is a multiuse governmental and retail structure and is not just one roof, but 14 individual green roofs spread out over two buildings in the Waterfront district of Washington D.C. Each roof is a four-inch Roofmeadow Type II system, planted with a mix of sedums and some alliums thrown in for early spring color. Planted at a rate of 6-inches on center the 14 green roofs total over 90,000 square feet of pervious surface area in the heart of —————————-———————————————-——–——————–D.C. That’s over 330,000 plants!
A temporary biodegradable wind blanket was incorporated into the design to help prevent wind scour (a possibility due to the exposure of the roofs). The plants were installed right through the wind blanket. The temporary wind blanket also helps to retain moisture by acting as mulch by covering bare spots until the plants grow into the spaces.
It’s really difficult to go on any green roof in Washington that doesn’t have a view of some iconic building or another.