Allstate Corporate Headquarters
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The Allstate Corporate Headquarters Greenroof; Photos Courtesy and ?GreenGrid.Project Name: Allstate Corporate Headquarters
Year: 2008
Owner: Allstate Insurance Company
Location: Northbrook, IL, USA
Building Type: Corporate
Type: Extensive & Intensive
System: Single Source Provider
Size: 13500 sq.ft.
Slope: 1.5%
Access: Accessible, Private
Submitted by: Jim Lindell, GreenGrid

Designers/Manufacturers of Record:
Modular Greenroof System: GreenGrid?
Photos Courtesy and ?GreenGrid.
The cafeteria at Allstate's Corporate Headquarters in Northbrook, Illinois looks out onto a 13,500 square foot extensive modular green roof installed July of 2008. The roof design also includes an accessible patio area, which features a small intensive garden and custom planter boxes for trees. The extensive green roof features new GreenGrid Lite modules, which were planted at a local nursery and grown out there for three months prior to delivery. The plant mix used for this roof includes Sedum album 'Murale', Sedum 'Bailey's Gold', Sedum spurium 'Fuldaglut', Sedum sexangular, Sedum spurium 'John Creech', Sedum spurium 'Dragon's Blood', Sedum rupestre 'Angelina', Sedum rupestre 'Forsteranum', and Sedum cauticola 'Lidakense'. This plant mix is bordered by a monoculture of Sedum kamtschaticum.

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