Integrating Sustainability Into the Built · PDF fileIntegrating Sustainability Into the...

Lunch Learning Session

January 20th, 2009 @ 12pm

Integrating Sustainability Into the Built Environment

Presentation Talking Points

• Identifying Sustainable Opportunities

• Sustainable Element Options

• Integrated Sustainable Elements

in Built Projects

Presented by:Laurel Macdonald Bonnell, ASLA

Date:December 2th, 2010 12 :30 PM

Greening Architecture Rooftop Treatments Health Care Environments

Our Areas of Expertise

Greening Architecture

• Cascadia US Green Building Council

• Green Roofs for Healthy Cities

•American Society of Landscape Architects

Our Qualifications

Commitment to Sustainable Design

Oregon University System Retainer Consultant

LEED Accredited Professionals

Licensed Landscape Architects (WA, OR, CA, MT)

WBE & ESB Certified #879 Oregon

Actively involved with sustainable organizations:

http://www.greenroofs.org/

http://www.asla.org/index.html

1. Identify all opportunities that are available

for the specific project, site, budget, and

users

2. Know the pro’s and con’s of each method

3. Understand the project and client goals

4. Utilize the 80/20 rule

5. Apply qualifying incentives (i.e. LEED, City

of Portland)

6. Perform Cost-Benefit analysis

7. Implement the best ‘green infrastructure’

solutions for the project

LEED NC – Site Related Credits

• Sustainable Sites and Water Efficient Landscape

Irrigation account for up to 14 points.

• Landscape solutions, such as eco-roofs, green

screens and water features can contribute

towards EAc1 - Energy Efficiency.

• Landscape materials and site furnishings can

contribute towards MRc3-6.

• Cost-effective solutions for additional LEED

points.

• ID credits also available for doubling existing

credit thresholds and for Exterior Building and

Landscape Maintenance.

Programming

Approach

Sustainable Site Programming

Potsdamer Platz Site

An Integrated System Approach

Increased Runoff Due To Impervious Surfaces

The Old Way Of Diverting Stormwater Runoff

The Sustainable Way To Treat & Slow Stormwater

Addressing Stormwater Sustainably

On-Site Detention & Filtration

Curbless Parking + Bioswales

On-Site Detention & Filtration

Flow Through Planters

Villas de Mariposa, Portland, OR

• 12 ecoroof projects constructed or

under development

• Range from 170 s.f. to 30,000 s.f.

• Total of over 100,000 s.f. designed

• Proven knowledge of what works in

our region

• VA American Lake ACU Nursing

Home

• Central City Library

• Portland Building

• Multnomah County Building

• Headwaters @ Tryon Creek

• Ashland High School• Providence St. Vincent’s

Experience

Projects

Ecoroofs

Ecoroof Experience + Projects

Improved Stormwater

Management

Urban Heat Island Reduction

Usable Green Space

Energy Efficiency/Thermal Insulation

Roof Longevity

Biodiversity/Habitat

Reduction of Noise

Reduction of Dust & Smog particles

Integrated Design Opportunities

Aesthetics/Views

Local Benefits

• Peak Storm Runoff Reduction

(CSO’s)

• Lower runoff temperature aids

fish habitat

• Several area examples/ acceptance

Incentives

• USGBC LEED Credits (Portland LEED)

• FAR Density Bonus (Central City)

• Stormwater Fee Reductions

• Approved Stormwater

Management Methods (BES)

• Potential Grants From

Governmental Agencies

Ecoroof Benefits + Incentives

Ecoroof Benefits

• Peak run-off discharge significantly reduced during storm events

• High water retention in warm season (May-September)

• Target annual water retention = 60% - 80%

Graphs courtesy of Portland BES

Ecoroof Water Retention

Water Retention

Ecoroof + Roof Garden Plan

Ecoroof Roof Garden

Typical Extensive Ecoroof Section

DESIGN ISSUES• Code requirements

• Structural capacity of roof (particularly w/ retrofit)

• Roof Slope (max. slope 25-100%[12 to 45 degrees])

• Drainage System

• Protection of roof waterproof membrane

• Desires of client (maintenance, aesthetic, function)

• Functional goals of roof (aesthetic/storm water, etc.)

• Cost vs. traditional system (life-cycle costs)

• Microclimate/surrounding environment

• Temporary, permanent, or no irrigation

• Plant selection/availability (planting time)

Typical Intensive Roof Garden Section

Roof Garden Sections

NORTHWEST HORTICULTURE – SEDUM TILES

Advantages of Proprietary Systems:

• Warranty included by product supplier

• Ecoroof and roof membrane easier to

maintain

• Pre Grown

• Weed Free

Proprietary Systems vs. Built-up Systems

COLUMBIA GREEN TECHNOLOGIES

XERO FLOR GREEN GRID

G-SKY

Proprietary Systems vs. Built-up Systems

BUILT-UP ECOROOF SYSTEM

Advantages of Built-up Systems:

• More economical

• More opportunities for custom

design

Custom Design

Ecoroof Details

Advantages of Custom Design:• Lower s.f. cost

• Ability to adapt to local conditions & build

local knowledge base

• Greater control

• Expansion of local markets

• Less transportation costs

Design & Construction

• Code requirements

• Structural capacity of roof (particularly w/ retrofit)

• Roof Slope (max. slope 25-100%[12 to 45 degrees])

• Drainage System

• Protection of roof waterproof membrane

• Desires of client (maintenance, aesthetic, function)

• Functional goals of roof (aesthetic/stormwater, etc.)

• Cost vs. traditional system (life-cycle costs)

• Microclimate/surrounding environment

• Temporary or permanent irrigation

• Plant selection/availability (planting time)

Design Issues

Base Components

• Waterproof Membrane

• Roof Drains

• Drainage Layer

• Root Barrier

• Edging/Curbs

• Filter Fabric

• Growth Media (soil)

• Vegetation

Optional Components

• Protection Layer

• Insulation

• Moisture Retention

• Leak Detection System

• Detention/Ponds

• Irrigation System

• Railings

• Paving

• Lighting


Ecoroof Components


WATERPROOF MEMBRANE TYPES

• Single Ply: TPO/PVC/EPDM

• Liquid Applied: Hot or Cold

• Torch Down - Built Up (Bitumen)

Issues

• Quality of initial roof installation

• Protection from damage during

construction of ecoroof

• Root Protection/ Barrier

• Costs

• Sustainability/ Health Issues

(Materials and Installation)

ROOT BARRIERS

Rubber Membrane

(Acts as Root Barrier)

• Fabric

• Herbicide Impregnated

• Copper Hydroxide

Issues

• All-in-One System is more

cost effective

• Costs

• Sustainability/ Health Issues

•(Materials and Installation)

• The Copper ‘Question’

Waterproof Membranes

Edge Section

ISSUES

• Soil Retention

• Strength

• Match Architectural Style

• Inhibit Water Gravitation

• Attachment Without Roof

Penetrations

Planting Media

Media Test Plots

• OSU

• PSU

• Seattle

Media Materials

• Perlite

• Biochar

• Pumice

• Vermiculite

• Sand

• Peat

•Coconut Coir

• Bark

•Sandy Loam

Local Suppliers:• Sunmark Environmental

• Pro-Gro Mixes

Planting Media

Ecoroof Plants

VEGETATION(what makes a good ecoroof plant)

• Low growth height

• Rapid growth / spreading

• High drought tolerance

• Fibrous root as opposed to tap

roots to protect roofing membranes

• No special irrigation or nutritional

requirements

• Low maintenance - trimming,

weeding, feeding

• Plants shouldn't generate airborne

seeds in order to prevent the green

roof plants invading other

landscaping.

WHICH PLANT?

• Climate/Microclimate

• Roof Function

(aesthetics/energy/stormwater)

• Initial costs & maintenance

costs

• Soil Depth

• Irrigation

• Establishment period

• Public use/accessibility

• Deciduous & Evergreen

• Color palette

• Native / Cultivated

Ecoroof Plants

NORTHWEST HORTICULTURE NURSERY – www.etera.com

Ecoroof Plants

S. kamtschaticum

S. Dragon’s Blood’

S. spathiulfolium

S. oreganum

Irrigation Options

IRRIGATION TYPES

• Spray Heads

• Drip Tubing (on surface or sub-

surface)

• Emitters

Issues

• Initial Establishment Period

• Types of Vegetation

• Roof Micro Climates

• ‘Critical Dry Zone’ - Drought Gaps

• Permanent vs. Temporary

• Water Budgeting

• Rain Sensor/Shut Off

• Rainwater Harvesting Option

(integrated system)

PORTLAND-SPECIFIC

CLIMATE ISSUES

• 30-40 day spans without even a

trace of precipitation, including the

record of 41 days, from June 27th to

August 6th of 1967.

• When trace precipitation (less than

0.01 inches) is factored in, the dry spells

increase even greater, with a 71 day

streak in 1967 with only a trace of

precipitation.

•There are a number of recorded 40-

60 day spans with only a trace of

precipitation, mostly occurring from

mid-June to late August

Ecoroofs

Built Sustainable Projects

5,841 s.f. Extensive Ecoroof – Portland, Oregon

Completed Fall 2010

Mead Building

Mead Building Ecoroof – Portland, Oregon

Structural Considerations

• Limited Live Load Capacity

(Under 10 lbs/sq. ft.)

• Large Equipment and piping to

provide access to.

• 7 Story Building

• Existing roof is leaking and reached the

end of it’s lifespan.

Mead Building Ecoroof – Portland, Oregon

Planting PlanGreen Living Technologies

Ultra Lightweight Panel System

• 43” x 43” square modular trays

• Pre-Grown Panels

• 2” Growing Media Capacity

• Drip Irrigation


Completed September 2008

Central City Library

• Limited Live Load Capacity

(Under 15 lbs/sq. ft.)

• Numerous HVAC units to provide

access to

• >5% Roof Slope

• 4’-9” Clearance From West Edge

Needed For Snow Drift Purposes

Central City Library Ecoroof – Portland, Oregon

Structural Considerations

AVRS Tray System:

• 2’ square modular trays

• Ability to interlock to prevent uplifting

• 4-5” Growing Media Capacity

• Slats To Receive Drip Irrigation


Planting Plan


Photographed May 2009

11,983 s.f. with 3,000 s.f. Public Plaza – Portland, Oregon

Completed June 2003

Multnomah County Ecoroof

GROWING MEDIA LIFTS

IRRIGATION AND PLANT INSTALLATION

PEDESTAL PAVERS AND SEATWALL

CRANING GROWING MEDIA

Multnomah County Ecoroof – Portland, Oregon

Multnomah County Ecoroof – Portland, Oregon

2004 People’s Choice Award


Completed November 2006

Portland Building Ecoroof

Portland Building Ecoroof – Portland, Oregon

Growing Media + Planting

Portland Building Ecoroof – Portland, Oregon

Completed Ecoroof

28,307 s.f. Extensive Ecoroof– Lakewood, Washington

In Construction

VA American Lakes Ecoroof

Ecoroof Parameters

• 3” Soil Depth With Sedum Plantings From Perimeter Wall To Top.

• 6-7” Soil Depth At Overhang Planted With Grasses

• Irrigation: Drip System

• Slope of Roof 1:12

• 16” Pavers On Sand For Maintenance Access

28,307 s.f. Extensive Ecoroof– Tacoma, Washington

In Construction

Ecoroof Components

• Irrigation Valve Boxes

• Shut Off Vales

• Cable Tie Offs

•Drainage Trough


Ecoroof Sedum Plants

• Sedum acre ‘Aurea’

• Sedum hispanicum ‘Purple Form’

• Sedum hybridum ‘Immergrunchen’ Grasses and Perennial Boarder Plants

• Sedum kamtschaticum ‘Varigatum’ Festuca glauca ‘Elijah Blue’

• Sedum reflexum ‘Blue Spruce’ Achillea ‘

• Sedum sexangulare

• Sedum spurium ‘Red Carpet’


Completed 2010

Intensive Roof Garden Over Garage

Portland, Oregon

The Harrison

Intensive Roof Garden– Portland, Oregon

Overton Condominiums

HIGHLIGHTS

• 3” Deep Extensive Ecoroof

• Custom Corten Steel Planters

• Pedestal Paving On Two Levels

• Custom Platform Decking

Intensive Roof Garden– Portland, Oregon

Highlights + Details

Greenwalls and Greenscreens

Greenwall and Greenscreen Options

Uses + Benefits

• Heat reduction on South/West sides of building

• Screening in tight vertical spaces

• Aesthetic features

Greenwalls and Greenscreens

Greenwall and Greenscreen Options

Built Living Green Walls

• Tournesol Building Green Components

• 30 x 60’ with 27,000 plants, Vancouver B.C.

Borealis Workforce Housing – Seattle, Washington

• Rooftop Planters Secured to Steel Overhead Trellis

• Metal Planter Boxes With Steel Mesh Screens At Every Floor

• Stainless Steel Cables Spaced 12” Apart and attached to each planter vertically

• Twining vines are planted in all planters which climb and drape to create a partial screen on the south and west sides of building


Design Elements

Exterior Irrigation and Drainage Connections

Planter Box DetailConceptual Sketch Of Greenscreen


Mixed Use Development

Albina – Block 33

Mixed Use Development – Portland, Oregon

Brown Field Site

Mixed Use Development – Milwaukie, Oregon

Completed Sept. 2006

North Main Village

North Main Village – Milwaukie, Oregon

Rainwater Plaza

Mixed Use Development – Portland, OR

Completed July 2008

Humboldt Gardens

SECTION – BIOSWALE W/SUBSURFACE ROCK GALLERY

Humboldt Gardens – Portland, Oregon

Engineered Bio Retention Swale

www.mep-pc.com

Macdonald Environmental Planning, P.C.1022 SW Salmon Street - Suite 470

Portland, Oregon 97205

503.224.1225

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