Nevin Center Green Roof

A site on the Sustainable Landscapes Trail

Beyond the trees at this location is a view of the vegetated surface on the Nevin Welcome Center roof. These plants were chosen not only for their aesthetic, but also for their practicality.

What Makes it 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)