sustainable strategies
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Sustainable Strategies. What we have learned. Sustainable Strategies. Reduce Reuse Reclaim and Recycle Appropriate use of land Use water and energy efficiently Enhance human health Strengthen local economies Conserve plants and animals - PowerPoint PPT PresentationTRANSCRIPT
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Sustainable Strategies
What we have learned
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Sustainable Strategies Reduce Reuse Reclaim and Recycle Appropriate use of land Use water and energy efficiently Enhance human health Strengthen local economies Conserve plants and animals Protect agricultural, cultural and archeological
resources Build and maintain economically Nice to live/work in Build it Beautiful
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Reduce Reuse Reclaim and Recycle
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Life Cycle Costing VS LC Assessment
Life Cycle Costing – Cost at time of purchase is amortized over the life of the building.
Example: A chair that costs $100.00 and lasts 50 years is better than a chair that costs $50.00 and lasts 10 years.
Swedish Finish vs. Water Based floor finish
Life Cycle Assessment – “Cradle to Grave “ cost. How much environmental damage is done creating and transporting an What is the environmental impact during its life? What happens to it when is becomes unusable, is it recyclable?
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Cradle to Grave – A one way street. Billions of dollars and huge quantities of natural resources are used to make things that are discarded in our landfills and incinerators.
We are called consumers but very little of what we purchase is actually consumed. Everything not for consumption is designed for you to throw away.
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Construction Waste
124 million tons of construction debris is buried in landfills every year. That is enough debris to build a wall about 30 feet high and 30 feet thick around the entire coast of the continental United States (4,993 miles). *
Each year the United States buries about 33 million tons of wood related construction and demolition debris in our landfills. As anaerobic microorganisms decompose this wood, it will release about 5 million tons of carbon equivalent in the form of methane gas.This is equivalent to the yearly emissions of 3,736,000 passenger cars. *
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50 percent of consumed materials (globally) are used in construction and remodeling. **
Re-using the lumber from just one house (2,000 square feet) saves 33 mature trees? *
For every ton of wood that is reused, we avoid creating 60 pounds of greenhouse gasses.*
*Statistics are used with permission from the great folks at Deconstruction Institute
**Statistics are used from Sierra Magazine - Jan/Feb 2005
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How Can We Help?
Reuse, reclaim, reduce and recycle Deconstruct rather than demolish
Metro Recycling Toolkit
Green Development Resource Center
Deconstruction Services
The Rebuilding Center
Habitat For Humanity Restore
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Appropriate use of land Pringle Creek
Greyfield – Lands pre-developed i.e. Abandoned shopping centers
Brownfield – Land with contaminated soil
Urban Growth Boundary
Density
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Use water and energy efficientlyWater Efficiency 8% of the electrical energy produced in this country
goes into the production of potable water (16% in Calif.)
Strategies Xeriscaping Water saving appliances and fixtures Reusing Greywater Storm water collection for watering plants and flushing
toilets
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Use water and energy efficientlyEnergy Efficiency
Third Party Evaluators – LEED, Earth Advantage, Living Building Challenge
Advanced Framing Strategies Better insulation The importance of sealing the building envelope Radiation Conduction and Convection Mean Radiant Temperature Low E windows Roof overhang strategies Heat Exchangers Solar - Passive & Active (hot water photovoltaic) Wind generated energy
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Air leaks are largest cause of ice dams
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…and pipe freezing problems
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Knee Wall
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Air Infiltration
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Blocking
Wind baffle
Permeable materialto prevent wind washing
Knee Wall Solution
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Insulation Types
Batts Blown-in blanket Spider Spray foam Hybrid Rigid exterior
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Staggered Studs
2 Rows: 2x4 16” OC
offset Blown-in blanket Better total wall R-value No thermal bridging
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BLOWN IN CELLULOSE
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DAMP SPRAY CELLULOSE
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Damp spray cellulose
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Foam + battsFoam + batts
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Some Alternative Wall Systems SIPS – Structural Insulated Panels
ICF – Insulated Concrete Forms
Composite blocks systems
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Structural Insulated Panels
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Insulated Concrete Forms – Alternative Materials
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Rastra blockRastra block
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Durisol blockDurisol block
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Enhance human healthImproving building ecology
Strategies Operable windows, adequate ventilation Elimination of products that contain VOC’s Adequate daylighting Sick Building Syndrome
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Strengthen local economies Buy building products made locally Mixed use housing promotes new businesses Green culture supports local businesses by making a
community more desirable to live in Green culture promotes new businesses that support
the green building movement. Solar industries as an example Ecoroofs Everywhere Ecohaus Bureau of Planning and Sustainability Yolo Paints Zena Forest Products
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Conserve plants and animals Strategies
FSC lumber – Zena
Eco-roofs
Sustainable site development
Developing grey and brownfields to support habitat
Building within the urban growth boundary
Xeriscaping
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Protect agricultural, cultural and archeological resources Responsible Development
Eco Trust
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Build and maintain economically
Think in terms of durability when choosing materials
Incorporate more passive systems to eliminate the need for maintenance
Smaller HVAC Systems Operable windows/skylights Low-E Glass Smaller HVAC systems Light shelves and eves Better insulation Advanced framing
Durable Materials
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Nice to live/work inPringle Creek
Mixed use Shopping, schools, within walking distance Community centered activities Close to bus line Trees and nature
Eco Trust Raised platforms for offices in the center of the room Operable windows Close to mass transportation Support bicycle rising Beautiful Common gathering areas Organic food
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Build it BeautifulEco Trust
Saved a beautiful building
Challenged the architects
Left historical evidence
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More on Eco Roofs
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The concept of greening a
rooftop is centuries old.Church in Vidimyri, Iceland, 1834
Houses in Iceland, circa 1800’s
Photo: Greenroofs.com
Photo: Greenroofs.com
Houses in Iceland, circa 1800’s
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It was early recognized that green roofs could improve a building’sdurability, regulation of temperature, and overall aesthetic value. Residential building in Germany
Photo: Greenroofs.com
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The use of green roofs has increased significantly throughout Scandinavia.
Ford dealership in Sweden
Photo: Greenroofs.com
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Major corporations are beginning to see the benefits of green roof technology.
GAP Inc. Headquarters, San Bruno, CA
Photo: Greenroofs.com
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Photo Courtesy Tom Liptan
In Portland, as in most areas, stormwater is now recognized as the number one cause of degraded urban stream health. This is an especially serious issue for our Rainy City because our waterways once supported wild populations of salmon.
Benefits
Degraded Runoff
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• Plants absorb rainwater
• Evapotranspiration
• The soil acts like a sponge
• These processes remove 30% to 50% of rainwater that falls on ecoroofs in Portland
• Positive effect on storm sewer systems
• This effects temperature, peak flow, and quality of the remaining runoff
• There is Five Times more residential rooftop than Commercial Rooftop area
The Rainwater Sponge
A 1,500 sq. ft. roof will shed 34,000 gallons of rainwater a year.
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Sound Reduction:
• Absorbs both ambient and penetrating sound waves• Sound insulation improved by up to 8 dB• Reflected sound reduced by up to 3 dB• Vegetation absorbs high frequencies• Soil absorbs lower frequencies
Graphic Courtesy ZincoflorPhoto courtesy of American Hydrotech
Building in the flight path of an Airport
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Thermal Behaviors:• Surface temp reduction of 14 – 22 deg.F ( 4” of soil)
• Significant wind chill reduction, reducing heat demand by 5% to 25%
• HVAC air conditioning units on greenroofs take in cooled air instead of superheated air
• Urban Heat Island Effect Mitigation
Graphic courtesy of Zincoflor
Cold
HotPhoto Courtesy Tom
Liptan
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Other Benefits:•Air Quality –Absorbs CO2 and Some Pollutants. Traps Dust, Releases Oxygen
•Wildlife Habitat and Greenspace Created up to 100% of Building Footprint
•Livability: Buffers Noise, Eliminates Glare, Aesthetic Value, Psychological Advantages
•Protection of Roof Surface Results in 2 to 3 Times Longer Life of Membrane
Beekeeper’s Roof Provides Nectar for His Native Honeybees
Ecoroof Atop Local Food Coop Includes Edible Herbs
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•We Share Our Knowledgebase of Lower-Cost, Locally-Available Materials and Designs•EE Project Managers Can Help with Procurement and Delivery of Materials
An Example of Low Cost Materials, Used in an Ecoroof Costing $7.00/ ft2. Shown Here is Pond Liner, Filter Fabric, and Common Corrugated Drain Pipe.
Graphic Courtesy of Steve Cowden, The Oregonian
Advancing the Industry by Reducing the Costs of Portland Area Ecoroofs:
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PCC Rock Creek Strawbale EcoroofInstallation
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Protection Board Installed
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Perimeter Strips Screwed In Place The Membrane will be Heat Welded to
these, to hold it down
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Roof Drain Holes Drilled The Roof Drain is made of Heat Weldable
Membrane. A watertight connection is very important.
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Roof Drain Hardware Being Installed from Underside of Roof
Simple Low Cost Parts Easy to Source at Most
Hardware Stores Not Complicated
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Closeup of Installed Drain This will be
waterproofed in the next steps
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Membrane Being Placed On Roof
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Roof Drain Welded to Membrane and “Dogear” being Formed for Corner Detail
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Close up of “Dog-ear”
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“Dog-ear” Being Welded with Heat Gun
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Perimeter Strips Welded to Membrane to hold it down
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Close up of Drain, Showing “Sleeve”