Ancaya Green Roof Garden Shed
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The Ancaya Green Roof Garden Shed; All Photos Courtesy of Emilio AncayaProject Name: Ancaya Green Roof Garden Shed
Year: 2005
Owner: Emilio Ancaya
Location: Raleigh, NC, USA
Building Type: Single-Family Residential
Type: Extensive
System: Custom
Size: 112 sq.ft.
Slope: 58.3%
Access: Inaccessible, Private
Submitted by: Emilio Ancaya, Living Roofs, Inc.

Designers/Manufacturers of Record:
Plant Supplier: Green Roof Plants/Emory Knoll Farms
Plant Ecologist, Green Roof Contractor: Emilio Ancaya, Living Roofs, Inc.
Landscape Designer: Kathryn Blatt
A raised grid structure was necessary due to the steep slope!All photos by Emilio Ancaya, Living Roofs, Inc.Ridge line grid; All Photos Courtesy of Emilio Ancaya
The property where the Ancaya Green Roof Garden Shed is located is topographically situated in a low area that gathers water during large rain events (4"+). Surrounding impervious rooftops are the major source of water runoff contributing to the small flood events. The property owners were in need of a backyard building to house gardening tools and materials but did not want to add to the impervious surface area. A green roof was a perfect choice for this situation. The green roof not only decreases the quantity of rainwater runoff from the garden shed roof, it also provides habitat for insects, birds, and butterflies, is an aesthetically pleasing addition to the urban backyard, and maintains cool temperatures inside the building creating a retreat from the summer heat. We are absolutely pleased with the green roof.
Almost ready for the growth media!Close-up of wood grid; All Photos Courtesy of Emilio Ancaya
The green roof was designed prior to building the garden shed. This allowed for the design of a structurally sufficient 7:12 roof system able to hold the weight of a fully saturated extensive green roof. Treated 2x4's were used for slope stabilization positioned 3/4" above the roof deck allowing water to drain freely bellow the grid. We are extremely pleased with how well the slope stabilization method has performed. The green roof did not slump or slide after the 7.5" tropical rain event in June 2006.

Because this was a small project (112 ft2, 10.4 m2), 10 mil polyethylene was used as the waterproofing membrane. The waterproofing was trippled to increase the thickness of the membrane. Root barrier cloth (garden store weed control cloth) was used above the waterproofing membrane. The media is 4 inches (10 cm) thick and comprised of three parts PermaTill Expanded Slate (coarse) and one part compost. The plants growing on the green roof include species of Delosperma, Sedum, Talinum, Euphorbia, and Sempervivum (some of the plants provided by Emory Knoll Farms/Green Roof Plants).

Additional thumbnail photos:

Close-up of grid on slope.Beautiful of July, 2007.A close up of July, 2007; All Photos Courtesy of Emilio AncayaLovely, colorful blooms in July, 2007.A serene winterscape on the Ancaya Garden Shed on January 18, 2007; All Photos Courtesy of Emilio Ancaya
Read about the owner/ greenroof design build consultant, Emilio Ancaya of Living Roofs, Inc., in the Greenroof Directory here. Due to an overwhelming response from their work and demand for affordable, design conscious, small scale green roofs that can be nestled into any size property, Living Roofs, Inc. developed a plan book for a build-it-yourself green roof shelter. See the one page introduction of "shelter tm" here and you can read more about it at: www.greenroofplans.com.
 
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