Greenroofs.com Project of the Week: 4/14/14

The Ohio State University (OSU)
Green Roof at Howlett Hall
Columbus, OH, USA
12,000 sf. Greenroof

Project Description & Details

Located on the 60-acre Chadwick Arboretum & Learning Gardens, Howlett Hall is home to The Ohio State University (OSU) Department of Horticulture & Crop Sciences and the Food Science Processing Plant. Having been designed to house a rooftop garden originally in 1967, previously it was a tar and chip roof that was hot and unattractive, as well as an under-utilized space on the urban campus.

Along with Mary Maloney, director of Chadwick, the renewed efforts of a former student, Megan Meier of Higher Ground Green Roofs, jump-started the green roof campaign again in 2010. Three and a half years later, the Ohio State University Green Roof at Howlett Hall was the first publicly-accessible green roof in Columbus. The depth of the lightweight growing media from rooflite® ranges from 4-6″ with areas where it mounds to 18″. The team covered about half of the roof with a pre-grown Sedum mat from Sempergreen, with 11-14 varieties. The other half was planted with 7,225 perennials. It is estimated that 191,196 gallons of polluted stormwater runoff are diverted each year from the watershed of the nearby Olentangy River, with a projected annual savings of $10,374 in energy costs and roof maintenance.

Year: 2013
Owner: Chadwick Arboretum & Learning Gardens
Location: Columbus, OH, USA
Building Type: Educational
Type: Extensive & Intensive
System: Custom
Size: 12,000 sq.ft.
Grade: 1%
Access: Accessible, Open to Public

Designers/Manufacturers of Record:

Landscape Architect: NBBJ
Architect: Mikel Coulter, CTL Engineering, Inc.
Owner’s Rep/Consultant: Higher Ground Green Roofs
Construction Management: Roofmeadow
Pre-vegetated Sedum Carpet: Moerings USA / Sempergreen
Growing Media: rooflite®
rooflite® Blender: Garick
Pavers: Hanover® Architectural Products
Installation: McCullough’s Landscape & Nursery

New!  Project of the Week Video Feature

Watch The Ohio State University (OSU) Green Roof at Howlett Hall Project of the Week Video below or see it on our on greenroofs.TV on YouTube:

Click here to see more information about this project in The International Greenroof & Greenwall Projects Database.

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Love the Earth, Plant a Roof!

~ Linda V.