Integrating Sustainability Into the Built Environment

Transcription

1 Integrating Sustainability Into the Built Environment Presentation Talking Points Identifying Sustainable Opportunities Sustainable Element Options Integrated Sustainable Elements in Built Projects Lunch Learning Session January 20 th, 12pm Presented by: Laurel Macdonald Bonnell, ASLA Date: December 2 th, :30 PM

2 Our Areas of Expertise Greening Architecture Rooftop Treatments Health Care Environments

3 Greening Architecture

4 Our Qualifications 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: Cascadia US Green Building Council Green Roofs for Healthy Cities American Society of Landscape Architects Commitment to Sustainable Design

5 Approach Sustainable Site Programming LEED NC Site Related Credits 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 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

6 Potsdamer Platz Site An Integrated System Approach

7 Increased Runoff Due To Impervious Surfaces The Old Way Of Diverting Stormwater Runoff The Sustainable Way To Treat & Slow Stormwater Addressing Stormwater Sustainably

8 Curbless Parking + Bioswales On-Site Detention & Filtration

9 Flow Through Planters Villas de Mariposa, Portland, OR On-Site Detention & Filtration

10 Ecoroofs Experience 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 Projects VA American Lake ACU Nursing Home Central City Library Portland Building Multnomah County Building Tryon Creek Ashland High School Providence St. Vincent s Ecoroof Experience + Projects

11 Ecoroof Benefits 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

12 Water Retention 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

13 Ecoroof Roof Garden Ecoroof + Roof Garden Plan

14 Typical Extensive Ecoroof Section Typical Intensive Roof Garden Section DESIGN ISSUES Code requirements Structural capacity of roof (particularly w/ retrofit) Roof Slope (max. slope %[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) Roof Garden Sections

15 Advantages of Proprietary Systems: Warranty included by product supplier Ecoroof and roof membrane easier to maintain Pre Grown Weed Free G-SKY COLUMBIA GREEN TECHNOLOGIES NORTHWEST HORTICULTURE SEDUM TILES XERO FLOR GREEN GRID Proprietary Systems vs. Built-up Systems

16 Advantages of Built-up Systems: More economical More opportunities for custom design BUILT-UP ECOROOF SYSTEM Proprietary Systems vs. Built-up Systems

17 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 Custom Design

18 Design Issues Code requirements Structural capacity of roof (particularly w/ retrofit) Roof Slope (max. slope %[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 & Construction

19 Ecoroof Components 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 Design & Construction

20 WATERPROOF MEMBRANE TYPES Issues Single Ply: TPO/PVC/EPDM Liquid Applied: Hot or Cold Torch Down - Built Up (Bitumen) 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 Issues (Acts as Root Barrier) Fabric Herbicide Impregnated Copper Hydroxide All-in-One System is more cost effective Costs Sustainability/ Health Issues (Materials and Installation) The Copper Question Design & Construction

21 Waterproof Membranes

22 ISSUES Soil Retention Strength Edge Section Match Architectural Style Inhibit Water Gravitation Attachment Without Roof Penetrations

23 Media Materials Perlite Biochar Pumice Vermiculite Sand Peat Coconut Coir Bark Sandy Loam Media Test Plots OSU PSU Seattle Local Suppliers: Sunmark Environmental Pro-Gro Mixes Planting Media

24 Planting Media

25 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

26 NORTHWEST HORTICULTURE NURSERY Ecoroof Plants

27 S. spathiulfolium S. kamtschaticum S. Dragon s Blood S. oreganum Ecoroof Plants

28 IRRIGATION TYPES Spray Heads Issues Drip Tubing (on surface or subsurface) Emitters 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 day spans without even a trace of precipitation, including the record of 41 days, from June 27th to August 6th of 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 day spans with only a trace of precipitation, mostly occurring from mid-june to late August Irrigation Options

29 Built Sustainable Projects Ecoroofs

30 Mead Building 5,841 s.f. Extensive Ecoroof Portland, Oregon Completed Fall 2010

31 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

32 Planting Plan Green Living Technologies Ultra Lightweight Panel System 43 x 43 square modular trays Pre-Grown Panels 2 Growing Media Capacity Drip Irrigation Mead Building Ecoroof Portland, Oregon

33 Central City Library 6,450 s.f. Extensive Ecoroof Portland, Oregon Completed September 2008

34 Structural Considerations 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

35 Planting Plan AVRS Tray System: 2 square modular trays Ability to interlock to prevent uplifting 4-5 Growing Media Capacity Slats To Receive Drip Irrigation Central City Library Ecoroof Portland, Oregon

36 Central City Library Ecoroof Portland, Oregon Photographed May 2009

37 Multnomah County Ecoroof 11,983 s.f. with 3,000 s.f. Public Plaza Portland, Oregon Completed June 2003

38 CRANING GROWING MEDIA IRRIGATION AND PLANT INSTALLATION PEDESTAL PAVERS AND SEATWALL GROWING MEDIA LIFTS Multnomah County Ecoroof Portland, Oregon

39 Multnomah County Ecoroof Portland, Oregon 2004 People s Choice Award

40 Portland Building Ecoroof 18,200 s.f. Extensive Ecoroof Portland, Oregon Completed November 2006

41 Portland Building Ecoroof Portland, Oregon Growing Media + Planting

42 Portland Building Ecoroof Portland, Oregon Completed Ecoroof

43 VA American Lakes Ecoroof 28,307 s.f. Extensive Ecoroof Lakewood, Washington In Construction

44 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

45 Ecoroof Components Irrigation Valve Boxes Shut Off Vales Cable Tie Offs Drainage Trough 28,307 s.f. Extensive Ecoroof Lakewood, Washington

46 Ecoroof Sedum Plants Sedum acre Aurea Sedum hispanicum Purple Form Sedum hybridum Immergrunchen Sedum kamtschaticum Varigatum Sedum reflexum Blue Spruce Achillea Sedum sexangulare Sedum spurium Red Carpet Grasses and Perennial Boarder Plants Festuca glauca Elijah Blue 28,307 s.f. Extensive Ecoroof Lakewood, Washington Completed 2010

47 The Harrison Intensive Roof Garden Over Garage Portland, Oregon

48 Overton Condominiums Intensive Roof Garden Portland, Oregon

49 HIGHLIGHTS 3 Deep Extensive Ecoroof Custom Corten Steel Planters Pedestal Paving On Two Levels Custom Platform Decking Intensive Roof Garden Portland, Oregon Highlights + Details

50 Greenwalls and Greenscreens Uses + Benefits Heat reduction on South/West sides of building Screening in tight vertical spaces Aesthetic features Greenwall and Greenscreen Options

51 Greenwalls and Greenscreens Built Living Green Walls Tournesol Building Green Components 30 x 60 with 27,000 plants, Vancouver B.C. Greenwall and Greenscreen Options

52 Borealis Workforce Housing Seattle, Washington

53 Design Elements 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 Borealis Workforce Housing Seattle, Washington

54 Exterior Irrigation and Drainage Connections Conceptual Sketch Of Greenscreen Planter Box Detail Borealis Workforce Housing Seattle, Washington

55 Mixed Use Development

56 Albina Block 33 Mixed Use Development Portland, Oregon Brown Field Site

57 North Main Village Mixed Use Development Milwaukie, Oregon Completed Sept. 2006

58 North Main Village Milwaukie, Oregon Rainwater Plaza

59 Humboldt Gardens Mixed Use Development Portland, OR Completed July 2008

60 SECTION BIOSWALE W/SUBSURFACE ROCK GALLERY Humboldt Gardens Portland, Oregon Engineered Bio Retention Swale

61 Macdonald Environmental Planning, P.C SW Salmon Street - Suite 470 Portland, Oregon