Client: Northwestern Memorial Hospital

Location: Northwestern Memorial Hospital, Chicago, IL

GreenGrid^® Size: 1,440 ft²

Contractor: WESTON

Landscape Design: WESTON

Rooftop System: Extensive

Status: Completed Summer 2004

Project Narrative: This first green roof for the Northwestern Memorial Hospital served as a pilot for the green roof planned for its currently-under-construction Prentice Women’s Hospital. This small 1,440 ft² pilot green roof was designed to show the functionality of the GreenGrid^® system and to complement the Olson Pavilion, one of Northwestern Memorial’s recently renovated structures. The green roof was composed of 180 Extensive (2’ x 4’ x 4”) GreenGrid^® modules and was installed using the building’s freight elevator in two days. The GreenGrid^® Extensive modules were planted with three individual patterns and assembled according to the landscape design resembling a meandering stream of green and red. Mix One included the following species: Festuca glauca ‘Elijah Blue,’ Sedum kamtschaticum, and Sedum album; Mix Two contains Sedum acre, Sedum album, Sedum ‘Bailey’s Gold,’ and Sempervivum ‘Purpurcum;’ and Mix Three contains Sedum rupestre ‘Forsteranum,’ Sedum kamtschaticum, and Sedum spurium ‘Dragon’s Blood.’ Mixes One and Three represent the banks of the river and Mix Two represents the meandering river. The photos were taken shortly after installation was completed.