The Rooftop Garden atop the Peggy Notebaert Nature Museum is composed
of several strata, including a membrane, a layer of aggregate for
drainage and support, a growing media, and the actual vegetation.
AUDIO: WATER TEST
AUDIO: MATERIAL1
AUDIO: MATERIAL2
AUDIO: MATERIAL3
AUDIO: MATERIAL4
AUDIO: KURT HORVATH ON DEPTH
AUDIO: BRUCE DVORAK ON LAYERS
GREEN ROOF CONSTRUCTION CYCLE– FALL 2003
Photos by Christopher Dunn
1)
The original roof
2) Roofing material is brought
up on
the roof in rolls. AUDIO: MATERIAL2
3) Orange waterproofing material
is rolled
out on the roof. AUDIO: MATERIAL3
4) Workers seal the material
to form
a watertight layer.
5) Because of the roof slope, dams are temporarily
installed. Water is sprayed onto the roof and pools behind
each dam. This is done to check for leaks in the roof
material before it is covered with the next layer.
AUDIO: WATER TEST
6) After the water barrier layer passes
its leak test, a root barrier layer is added to protect
it from damage caused by the soil and plants.
7) The root barrier layer is smoothed out
and loosely sealed in place.
8) A layer of felt is added as a cushion
and to help hold the soil in place. Soil is blown up on
to the roof through the large hose.
.
9) The soil is smoothed out into position
on the roof.
10) The soil layer is ready for seeding.
11) Seeds and cuttings on the soil layer.
12) Through the long Chicago winter.
13) Summer 2004--The garden takes root!
Note the different colors and shapes of sedum. In just
its first summer, more than 80% of the roof is now covered
with greenery.
RESOURCES:
1. Non-point
Source News-Notes
Non-point Source News-Notes is an occasional bulletin dealing with
the condition of the water-related environment, the control of non-point
sources of water pollution, and the ecosystem-driven management and
restoration of watersheds. NPS pollution comes from many sources and
is caused in part by rainfall or snowmelt moving over impermeable
surfaces and picking up pollution, which then end up in local waterways.
Source:
March 2000, Issue #60
For more information, contact Doug Seiter, Green Builder Program State
Coordinator, c/o Planit Green, 11960 West 60th Avenue, Arvada, CO
80004-4463.
Phone: (303) 421-4889; fax: (303) 421-4889; e-mail: dougseiter@earthlink.net
2. WBDG- Whole
Building Design Guide
Green roofs, also known as vegetated roof covers or eco-roofs, are
thin layers of living vegetation installed on top of conventional
flat or sloping roofs. Green roofs protect conventional roof waterproofing
systems while adding a wide range of ecological and aesthetic benefits.
They are a powerful tool in combating the adverse impacts of land
development and the loss of open space.
Source:
Whole Building Design Guide
National Institute of Building Sciences (NIBS)
1090 Vermont Avenue NW, Suite 700
Washington, DC 20005
Tel 202.289.7800 • Fax 202.289.1092
3. Neuse
River Education Team
When the weather warms, the new roof that architect Charles Brown
and two dozen helpers planted Friday on his office in downtown Raleigh
should burst to life with succulent blooms of red, yellow and white.
The more pressing question is whether the spongy new roof also will
help reduce pollution in the Neuse River and ease flooding.
4. Low
Impact Development Center, Inc. Specifications of Green Roofs:
While there is no standard classification for rooftop greening covers
they can be generally classified as being extensive or intensive green
roofs. Extensive green roofs are characterized by their low weight,
low capital cost and low maintenance. Intensive green roofs are characterized
by their increased weight and capital cost, and their intensive planting
and higher maintenance requirements. Diversity of plants is greater
with intense gardens because the structure can hold more soil, thus
permitting plants with longer root systems to thrive.
5. TectaGreen
green roof applicators
The TectaGreen™ system is a green space created by adding layers
of growing medium and plants on top of a traditional roofing system.
This should not be confused with the traditional roof garden, where
planting is done in freestanding containers and planters, located
on an accessible roof terrace or deck.
Source:
Street Ash Nursery, Combe St. Nicholas, Chard, Somerset, TA20 3HZ,
UK.
Tel. +44 (0)1460 234582 E-mail: jcw@blackdownhortic.co.uk
7.A
Guide to Rooftop Gardening- City of Chicago Department of Environment
A complete green roof consists of many layers. These layers mimic
the conditions found in nature, creating an environment suitable for
plant growth. In this way, rooftops can be converted from dead space
into viable green spaces that will benefit everyone.
8. Green
Roofs for Healthy Cities
A green roof system is an extension of the existing roof. It involves
a special waterproof and root repellant membrane, a drainage system,
filter cloth, a lightweight growing medium and plants. Green roof
systems may be modular, with drainage layers, filter cloth, growing
media and plants already prepared in movable, interlocking grids,
or, each component of the system may be installed separately.
9.
Ecoroof Question and Answer, Portland's Bureau of Environment
Portland’s Ecoroof Program is a cooperative effort of the Bureau
of Environmental Services and the Office of Sustainable Development.
The program promotes ecoroofs by researching ecoroof technologies
and providing information and technical assistance to community members.
This site responds to the many questions a prospective green roof
owner might have.
10.Design
Guidelines for Green Roofs Green roof infrastructure promises to become an increasingly important
option for building owners and community planners. As we move into
the 21st century, green roofs can address many of the challenges facing
urban residents.
Source:
Design Guidelines for Green Roofs
by Steven Peck and Monica Kuhn, B.E.S., B. Arch,O.A.A.
11. Emory Knoll Farms- Green
Roof Plants
Typically, a green roof consists of a thin (2 – 3 inches) layer
of soil and a drainage layer, applied directly to a roofing membrane.
For sloped roofs, baffles may be necessary to retain the soil. Green
roof plants are typically short perennials and succulents, including
such varieties of Sedum or Delosperma. These plants will quickly cover
the soil and prevent erosion, retain rainwater, and provide insulation
and respirative cooling.
Welcome | The Peggy Notebaert
Nature Museum
A
Guide to Rooftop Gardening- City of Chicago Department of Environment