Pacific Plaza Office Building
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The Pacific Plaza Office Building greenroof on July 3, 2012. Photo Courtesy of Roofmeadow.Project Name: Pacific Plaza Office Building
Year: 2009
Owner: Tacoma Public Works, Facilities Management
Location: Tacoma, WA, USA
Building Type: Commercial
Type: Intensive
System: Single Source Provider
Size: 30294 sq.ft.
Slope: 1%
Access: Accessible, Private
Submitted by: Roofmeadow

Designers/Manufacturers of Record:
Greenroof System Provider & Consultant: Roofmeadow
Architect: BLRB Architects
Waterproofing: Sika Sarnafil, Inc. - Northwest
Construction: Absher Construction Company
Landscape Architect: Valerian LLC
The Pacific Plaza Office Building greenroof on July 29, 2010. Photo Courtesy of Roofmeadow.The Pacific Plaza Office Building greenroof on August 31, 2009. Photo Courtesy of Roofmeadow.
The Pacific Plaza retrofit project was built through the cooperation of a public/private partnership between the City of Tacoma and the Pacific Plaza Development, LLC. The climate of the Pacific Northwest drove the design of the green roof and the irrigation system, which is fed with harvested rainwater, is not connected to the potable water supply. Completed on July 17, 2009, the green roof on this parking garage-turned office building enhances the downtown area and represents one of the many progressive, green initiatives in this innovative rehab.
The green roof was established with a combination of sedum cuttings distributed on the entire surface of the green roof and native and adapted perennials seeded into the center of the roof, establishing two separate planting zones. The green roof covers approximately 85% of the roof area and is visible from many of the adjacent buildings. The Irrigation system is designed to run only through the months of May through September and is connected to a rain sensor to avoid unnecessary water loss. When the cistern levels are low the irrigation levels are dialed back, and when the cistern is full, irrigation levels are increased.

Additional thumbnail photos:

The Pacific Plaza Office Building greenroof on July 3, 2012. Photo Courtesy of Roofmeadow.The Pacific Plaza Office Building greenroof on July 29, 2010. Photo Courtesy of Roofmeadow.The Pacific Plaza Office Building greenroof on August 31, 2009. Photo Courtesy of Roofmeadow.
Read the Pacific Plaza case study from National Association for Industrial and Office Parks (NAIOP). Learn about the following companies in The Greenroof & Greenwall Directory: Roofmeadow and Sika Sarnafil.
 
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