Pieso Poagen, Nine Mile Falls, Washington, WA

Sloped green roof surrounded by trees
project profile data

Area:

ca. 7,500 sq. ft. (700 m虏)

Year of construction:

2012

Architect/Design:

Olson Kundig Architects, Seattle, WA

Contractor:

McPeak Roofing, Lewiston, ID

System Build-up:

鈥淪loped G黑料社鈥 with Georaster庐 and Floradrain庐 FD 40-R

Project report
ZinCo_Washington_Pieso_Poagen.pdf1021.09 KB

This high end residential green roof is broken up into three separate areas. The roofs are all barrel shaped with slopes in excess of 30 degrees. There is a custom fabricated steel parapet wall that encloses the entire green roof build-up. On the steepest slopes (the bottom of the roof edges) the parapet wall is perforated with 1鈥 (25.4 mm) slots that feed to an internal gutter system to insure consistent drainage away from the exterior walls.The ZinCo Georaster庐 system stabilizes 5鈥 (127 mm) of extensive growing media on the steepest sections of the roof and rolls of Floradrain庐 FD 40-R were used on the 鈥渢op of the roof barrels鈥 where stabilization was less important, but water retention was critical. The roof utilized pre-cultivated sedum mats that provided nearly 100 % coverage on the day of installation and will continue to flourish with a variety of colors as the roof ages.

  • Georaster庐-elements are placed on a sloped roof
    In the steeper areas the Georaster庐-elements have been placed on the Water Retention Mat WSM 150, starting from below.
  • Floradrain庐 FD 40-R elements on a sloped roof
    In the flatter areas above the Georaster庐-elements Floradrain庐 FD 40-R have been installed.
  • Man applies Sedum vegetation mats on a sloped roof
    In order to obtain a complete green coverage immediately pre-cultivated vegetation mats have been applied on the growing media.