Charles Library boasts one of Pennsylvania’s largest green roofs

May 20, 2020 by  
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Contemporary, sustainable and welcoming, Temple University’s new Charles Library in Philadelphia raises the bar for research libraries around the world. Completed by  Snøhetta  for $135 million in 2019, the new LEED Gold-targeted Charles Library is not only a beacon of energy-efficient design, but also integrates a diversity of collaborative and social learning spaces that are typically left out of traditional research libraries. The new library also boasts a 47,300-square-foot green roof — one of the largest in Pennsylvania — that covers over 70% of the building’s roof surface and is part of a stormwater management system designed to manage all rainwater runoff on the approximately three-acre site, plus an additional acre of off-site impervious ground.  Built to replace the Paley Library, the Charles Library offers more than double the number of study spaces compared to its 1960s predecessor. The 220,000-square-foot  library  is located at the intersection of two major pedestrian pathways, Polett Walk and Liacouras Walk, and responds to its high-traffic location with an inviting public-facing design that includes generous plazas sloping up to the library entrances. Large expanses of glazing and grand wooden arched entrances cut into the split-faced granite facade help emphasize a welcoming atmosphere. Inside, the building is centered on a large domed atrium lobby that offers views of every corner of the building. Natural light is a key feature of the new library, particularly on the sun-filled fourth floor where visitors are encouraged to wander through stacks of the library’s browsable collection. The fourth floor also looks out on views of the lush  green roof  and gardens, which are planted with over 15 different species to provide a rich urban habitat for pollinators.  Related: LEED Gold-targeted library and community park has otherworldly appeal The 47,300-square-foot green roof is part of the library’s  stormwater management  system that also includes pervious paved plazas and paths as well as landscaped planting beds. Rainwater that infiltrates these permeable surfaces are directed into two underground catchment basins that can store and process nearly half a million gallons of water during storm events.  + Snøhetta Images © Michael Grimm

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Charles Library boasts one of Pennsylvania’s largest green roofs

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