Nevin Center Green Roof
Sustainable Landscapes Trail at Cornell University
Beyond the trees at this location is a view of the vegetated surface on the Nevin Welcome Center green roof. These plants were chosen not only for their aesthetic, but also for their practicality.
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Why is this site sustainable?
- Vegetated roof surfaces capture and treat precipitation falling on the building roof, which protects local waterways
- The layers of soil and plants act as an insulating layer in winter and decrease the cooling demand during the summer
- Demonstrates a solution to urban heat islands
- The plantings require no irrigation and very little weeding
- Riverstone ballast lines the perimeter of the roof, which slows and directs stormwater runoff to storm drains
NWC Green Roof Construction and Function
- Riverstone ballast on perimeter of roof slows the flow of stormwater runoff.
- Vegetation covers 2,786 ft2 of the 4,072 ft2 roof (68%).
- The roof is planted with four cultivars of Sedum species for a varied and more interesting appearance. There are equal distributions of Sedum Album‘White Stonecrop’, Spurium ‘White Two-Row Stonecrop’, Spurium ‘John Creech Two-Row Stonecrop’, and Ternatum ‘Wild Stonecrop’.
- The soil and underlying substrate is designed to capture the moisture and slow the flow of stormwater runoff.
- Excess runoff from the green roof runoff infiltrates through French drains, which were sized to infiltrate twice the required volume of the 1- and 2-year storm.
Resources reviewed: ppt. presentation on Cornell green buildings, BSN ppt. on, USGBC website, “Green Building Tour Tips and Techniques,” Final LEED review report. (should add link)