Point Defiance Zoo and Aquarium Hospital
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Project Name: Point Defiance Zoo and Aquarium Hospital
Year: 2002
Owner: Point Defiance Zoo and Aquarium Hospital
Location: Tacoma, WA, USA
Building Type: Municipal/Government
Type: Extensive
System: Single Source Provider
Size: 10000 sq.ft.
Slope: 10%
Access: Inaccessible, Private
Submitted by: John Shepley

Designers/Manufacturers of Record:
Greenroof System: Roofscapes, Inc.
Roofing Company: Snyder Roofing
Landscape Installer: Teufel Nurseries
Roofing Membrane Supplier: Sarnafil
Architects: Boxwood
The 10,000 sf un-irrigated extensive project was completed in 2002 using a variation of the Roofscapes, Inc. Roofmeadow? Type II Aromatic Garden assembly of mostly sedum varieties established from plugs and chives. An erosion blanket was used to hold plugs in place. This earth-friendly, state-of-the-art animal care facility opened on Nov. 1, 2003. The hospital features many energy-efficient features, including the "living" roof planted with grasses, recycled building materials, solar water heating, and stormwater collection and retention.
The Roofscapes website states "A key challenge with this project was the load constraint; the maximum load could not exceed 15 pounds per square foot." The architects were Boxwood, and associate Karen A. Davis Smith tells us the Point Defiance Zoo and Aquarium's Animal Health Care Facility was designed to provide a variety of color and texture. It holds approximately 3 inches of growing media with tumbled recycled blue glass cullet perimeter edging. The green roof system is installed over a Sarnafil membrane and includes an electrical leak detection system.

Additional thumbnail photos:

Learn more about Roofscapes in The Greenroof Directory. For more information about this project, visit Roofscapes, Inc. here. See Linda S. Velazquez's August/September 2004 Sky Gardens ~ Travels in Landscape Architecture column about Seattle and Washington state here.
 
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