Green Roofs - Living Architecture Monitor - Winter 2015 - 12


DESIGN LEADERSHIP

GREEN ROOF PLAN WITH WATER FLOW
SEDUM ROOF WITH NATIVE MEADOW

MEADOW ROOF
TREE PITS WITH
BIORETENTION
MEDIA

KRISHNA P. SINGH CENTER FOR
NANOTECHNOLOGY EXTERIOR

DESIGN AWARD
CATEGORY: EXTENSIVE INSTITUTIONAL
PROJECT: MEADOW ROOF AT THE KRISHNA P. SINGH CENTER
FOR NANOTECHNOLOGY
LOCATION: PHILADELPHIA, PA

TEAM MEMBERS

PHILADELPHIA FROM THE KRISHNA P. SINGH
CENTER FOR NANOTECHNOLOGY ROOF

Green Roof Consultant and Provider: Charlie Miller, Roofmeadow
Property Owner: Iran Winston, University of Pennsylvania
Architect/Landscape Architect: Todd Hoehn, WEISS/MANFREDI
Civil Engineer: Omar E. Rosa, Stantec Consulting
General Contractor: Kevin Kriebel, Gilbane Building
Green Roof Construction/Maintenance: Karen Gibson, G.R.A.S.S.
Roofing: Ed DeAngelis, E.D.A. Construction Company

A CROSS-DISCIPLINARY
COLLABORATION
T

he Meadow Roof is a prominent feature of the University's first
cross disciplinary building, attracting individuals and groups eager
to enjoy time on the rooftop amenity space. Surrounded by floor
to ceiling etched glass walls on three sides and a clear glass railing
open to the city on the fourth side, the Meadow Roof is also visually
accessible from corridors and conference rooms. A second larger
green roof includes native perennials and grasses planted alongside
the building's air handling and HVAC equipment. This larger sedum
roof is a storm water management workhorse.
Both green roof areas feature a diversity of planting that includes
a number of native species that attract a variety of birds and pollinators. During the first year after planting, completion annuals
(Gaillardia pulchella) germinated among the pre-grown Sedum mats.
In the second growing season, the annuals emerged again, this time
LIVING ARCHITECTURE MONITOR / WINTER 2015 / 12

along with biennials and young perennials (Echinacea pallida).
Runoff water from the adjacent deck irrigates the Meadow Roof,
which also is supplemented with a base-level capillary irrigation
system during dry periods. The upper, non-greened roof runoff
nourishes the two deep Meadow Roof bioretention tree pits, with
supplemental irrigation during dry periods. The sedum roof manages
the runoff from the adjacent rooftop HVAC equipment, the surrounding 15 foot parapet, and impervious paver walkways. The green
roofs assure cost-effective compliance with Philadelphia's stormwater
regulations, reducing stormwater site fees by 27 percent. Additionally,
integrating hydraulically independent biorentention cells into the
extensive Meadow Roof obviated the need to replace the ground
level detention basins with a more costly ground measure to both
pre-treat and detain runoff.
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Table of Contents for the Digital Edition of Green Roofs - Living Architecture Monitor - Winter 2015

Green Roofs - Living Architecture Monitor - Winter 2015 - IP
Green Roofs - Living Architecture Monitor - Winter 2015 - Cover1
Green Roofs - Living Architecture Monitor - Winter 2015 - Cover2
Green Roofs - Living Architecture Monitor - Winter 2015 - IC
Green Roofs - Living Architecture Monitor - Winter 2015 - ID4
Green Roofs - Living Architecture Monitor - Winter 2015 - 1
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Green Roofs - Living Architecture Monitor - Winter 2015 - I-1
Green Roofs - Living Architecture Monitor - Winter 2015 - I-2
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