Vegetated Roof Cover
Philadelphia, Pennsylvania
Key Concepts:
Ø Structural Control
Ø Retrofit Opportunity
Ø Volume Reduction
Ø Life Cycle Costs
Project Benefits:
Ø Runoff Reduction
Ø Air & Water Quality
Improvement
Ø Aesthetics
Ø Energy Conservation...
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Vegetated Roof Cover
Philadelphia, Pennsylvania
Key Concepts:
Ø Structural Control
Ø Retrofit Opportunity
Ø Volume Reduction
Ø Life Cycle Costs
Project Benefits:
Ø Runoff Reduction
Ø Air & Water Quality
Improvement
Ø Aesthetics
Ø Energy Conservation
LOW-IMPACT
DEVELOPMENT
CENTER
United States Office of Water (4203) EPA-841-B-00-005D
Environmental Protection Agency Washington, DC 20460 October 2000
Introduction
Vegetated roof covers on industrial and office
buildings have been used in Europe for more than
25 years to control runoff volume, improve air
and water quality, and promote energy
conservation.
These systems, known as “green
roofs” or “extensive roof gardens,” also have
aesthetic benefits.
They typically include layers
of drainage material and planting media on a
high-quality waterproof membrane.
These
systems use foliage and a lightweight soil mixture
to absorb, filter, and detain rainfall.
Some of the
conditions responsible for the promotion and
acceptance of green roofs i
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