2012 ASLA Annual Meeting Education Session FRI C-7
Successful Green Roof
Design in Arid Regions
Speakers:
Kristina Floor, FASLA, LEED AP
Todd Huston, ISS Grounds Control, Inc.
Jeff Stanton, AIA, LEED AP BD+C
Successful Green Roof Design in Arid Regions
FRI C-7
Learning Objectives & Presentation Outline
Arid regions pose challenges for any open-space design, especially in an urban environment. Heat, shade, and water
are critical factors. Further, any over-structure installation
poses potential long-term problems. This session will
present successful landscape design solutions for green
roofs in arid regions.
•Increase understanding of the different building
structural systems that influence the design of plazas and
landscape over occupied space.
•Understand how to incorporate a green roof into a
project within an arid climate and have it stand the test of
time
•Understand what factors influence green roof design from
a design, implementation and maintenance viewpoint
Course Outline
I.
Introduction
a. Benefits of incorporating green roofs
b. Common concerns in the implemenation of green roofs
c. Testing and evaluation of green roofs in arid climates
d. Cost factors / Life cycle
e. Green roofs as a part of an overall water conservation approach
II. Intensive Green Roof Design
a.
b.
c.
d.
e.
Definition of Intensive Green Roof Design
Building Structural Systems – affect on design strategies
i.
Post Tension
ii. Cast-in-Place
iii. Structural Ts
Design approach
Site sections and details
Special considerations
i.
Engineered soil versus native soil
ii. Drainage Systems
iii. Irrigation systems
iv. Waterproofing systems
v. Fertilizer injection systems
vi. Zone of Backfill / Transfer Slabs
III. Extensive Green Roof Design
a.
b.
c.
d.
e.
Definition of Intensive Green Roof Design
Design approach
Site sections and details
Mock-ups / test beds
Special considerations
i.
Container plants versus sedum beds
ii. Micro-climate and exposure considerations
iii. Irrigation system,
iv. Moisture sensors
v. Drainage systems
IV. Construction Strategies
a.
b.
Construction strategies from a scheduling standpoint, access standpoint and weight limitations
Partnership between Owner, Contractor and design team to ensure success in implementation and downstream
maintenance
V. Maintenance Considerations
a.
b.
c.
Commitment to design strategies
Special maintenance considerations for Intensive systems
Daily / weekly / monthly / yearly requirements
Successful Green Roof Design in Arid Regions
FRI C-7
Speaker Bios
Kristina Floor, FASLA, LEED AP
SmithGroupJJR
Todd Huston
ISS Grounds Control, Inc.
Jeff Stanton, AIA, LEED AP BD+C
SmithGroupJJR
Kris serves as Design Principal
for Landscape Architecture for
SmithGroupJJR, known for providing innovative sustainable design
solutions for many projects across
the nation. Her 30-year career aims
specifically towards large mixed use
projects primarily within the Phoenix
area, many of which have incorporated street level roof gardens, raised
terraces & green roof design. Her
work includes a series of urban plazas
and landscapes which have been
nationally recognized from a design
standpoint. These projects, which
often pose challenging conditions,
have also been recognized for their
long term success.
Todd Huston has been employed
with ISS Grounds Control, Inc.
for over 21 years. He is fluent in all
phases of landscape construction,
landscape maintenance and green
roof installation including design,
estimating, project management, and
customer relations. Notable projects
in Arizona include Optima Camelview, Safari Drive, Westcor Malls
and Marriot Desert Ridge Resort.
Currently Todd acts as the General
Manager for operations throughout
Arizona as well as financial reporting
and office management
Jeff Stanton is Sustainable Design
Director for SmithGroupJJR’s
Phoenix office. With over 32 years
experience as an architect/project
manager, he has been a passionate
advocate for the community and
environment and looks for ways
to bring sustainability to all of the
firms projects regardless of formal
certification as well as improve the
firms operations. Jeff is a past board
member of the USGBC Arizona
Chapter and past Governing Council
member of the USGBC-AZ Central
Branch. Jeff is currently involved with
the USGBC West Region Arizona
Chapter Regionalization Task Force
which is responsible for determining
regionally based LEED Credits as
well as AIA’s Large Firm Roundtable
on Sustainability whose efforts have
been instrumental in helping firms
to adopt the AIA’s Commitment to
the 2030 Challenge and reporting
their results. In addition to being
published, he has presented on
topics of sustainability at Greenbuild,
Scottsdale GreenBuilding Expo, AIA
Committee on the Environment and
the AIA Arizona State Conference.
Banner Health
Banner Good Samaritan Healing Garden
Phoenix, Arizona
This project was a collaboration between Floor & Ten Eyck, The Orcutt/Winslow Partnership and Joan Baron, Artist. The challenge was to take an existing
concrete courtyard (all over-structure) and turn it into a multi-sensory garden.
Taking a cue from the adjacent curvilinear concrete hospital tower, sinuous
concrete walls were created at seat height to add the dimension of human scale.
These form the terraced garden that is visible from the patients’ rooms and the
lobby of the hospital. The native, medicinal plants and the water feature that
slip through the garden symbolize the different stages of life. Subsequently,
JJR came back to the project for upgraded landscape improvements, complimenting the original garden design.
Size
20,000 s.f.
Services
Landscape Architecture
Hardscape Design
Water Feature Design
Artist Design
Coordination
Budget
$75,000 - 1998
$60,000 - 2005
Completion
October 1996
November 2005
Optima Camelview Village
Scottsdale, Arizona
This highly technical over-structure condominium community
incorporated the unprecedented use of extensive green roofs totaling
more than 500,000 square feet over the multiple 7-story structures.
Camelview Village is the first project to incorporate this type of
planting system in an arid environment presenting numerous
viability, maintenance and aesthetic challenges.
Our Studio provided hardscape, water feature and landscape design
for the overall 13 acre site.
In conjunction with Dr. Chris Martin and MSW Nurseries, we
established a series of above ground test beds to test the viability
of various plant, soil and irrigation combinations to determine the
right balance between form and function in the final design. Having
completed construction documents through 90% completion, as a
design-build organization working with the home buyers, Optima
used the documents and test bed results as a framework to construct
the project. As a result, significant changes to the original concepts,
details and specifications were made during construction.
Completion
2009
Size
13 acres
Cost
Total: $8,900,000
Landscape + Hardscape
Awards
ALCA
-President’s Award
2008
Valley Forward Association
-Environmental Design
Excellence Award 2008
Scottsdale Waterfront Phase 1 & 2
Scottsdale, Arizona
Our Studio developed the overall site theme and image
for Scottsdale Waterfront, a high-end, mixed-use project
located in downtown Scottsdale. The residential component is comprised of twin high-rise residential towers
located in the heart of the site surrounded by the mid-rise
retail and office space along the street frontages. The
Arizona Canal forms the southern edge.
The master plan draws heavily from desert landscape
imagery, as well as historical references of Scottsdale for
inspiration. The concept incorporates the bold forms,
colors and textures of native cacti and cactus flowers
throughout the plazas and public spaces as an overall
unifying theme. Strong chroma paving, sculptural walls,
fabric shade structures and custom light fixtures create a
unique sense of place while providing interest and texture.
Completion
2007
Size
14 acres
Cost
$1,500,000
Landscape + Hardscape
Awards
2008 Valley forward
Association-Environmental Excellence
Award
2008 AZ|RE RED
Awards -Best MultiFamily Project
Notes: