SUSTAINABLE ROOFING ENVIRONMENT ENERGY DURABILITY ACCOUNTABILITY The ROOFLIFE Sustainable Roofing...
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SUSTAINABLE ROOFING ENVIRONMENT ENERGY DURABILITY ACCOUNTABILITY The ROOFLIFE Sustainable Roofing Decision Model:
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Transcript of SUSTAINABLE ROOFING ENVIRONMENT ENERGY DURABILITY ACCOUNTABILITY The ROOFLIFE Sustainable Roofing...
SUSTAINABLE ROOFING
EN
VIR
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ME
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ACCOUNTABILITY
The ROOFLIFE Sustainable Roofing Decision Model:
Energy. The roof should incorporate the best available technologies to reduce overall building energy consumption and support clean energy production within the building it covers.Durability. The roof should be designed using the most effective combination of initial performance and planned ongoing service to achieve an optimal service life, in turn reinforcing the overall service life of the building it covers.Environment. The roof should incorporate the best available strategies to address other environmental impacts that may be reduced through effective design, installation and management of the roof.
The ROOFLIFE Model
What is a Sustainable Roof?
A sustainable roof is designed, installed and managed with a goal to minimize overall environmental impact. In order to accomplish this goal, a sustainable roof must be developed in a step-by-step design focusing on…
Finally, the planned environmental benefit of the roof must be validated and retained through an ongoing accountability process to assure the roof performs as expected throughout its service life.
DesignFactors
Design Options
Design Resources
Sustainable Roof Plans &
Specifications
That affect…..
That help reduce…
For use by designers to develop…
Sustainable Roofs
Offer…
Reference… Used to build & maintain…
Environmental Impact
Leading to…Environmental Impact
ReducedEnvironmental Impact
Identify…1
2
3
4
5
6
The ROOFLIFE Model
The ROOFLIFE Decision Model
The ROOFLIFE Model
Key Factors & Options
Key Factors
Energy
Durability
Environment
Accountability
Key Options
Reduce Energy Use Produce Clean Energy
Anticipate Extreme EventsEstablish a Life Cycle Plan
Reduce Impact
Validate & Manage the Life Cycle
Factor
Thermal Efficiency
Peak Energy Demand
Clean Energy Production
Available Options
1. Increased Thermal Insulation2. Insulation “Best Practices” Staggered Insulation Layers Eliminate Through-Fasteners Protective Cover Board
“Cool” Roofs: 1. Reflective Roofs 2. Vegetated Roofs 3. Cool Ballasted Roofs
Clean Energy Roofs:1. Roof Daylighting2. Photo-Voltaic Roofing3. Solar Thermal Roofing
ROOFLIFE Factors / Options
Energy
Potential Impacts
Energy Use /Greenhouse Gas
Factor
Special Climatic Factors 1. Hail 2. High Winds 3. High UV 4. High Freeze-Thaw 5. High Vapor Drive
Special Use Factors 1. High Roof Traffic 2. Critical Use Facility
Life Cycle Planning Factors 1. Limited Initial Resources 2. Limited Ongoing Resources 3. Optimized Life Cycle Cost
Available Options
1. Enhanced hail-resistance systems2. Enhanced wind-resistance systems3. Enhanced surfacing / maintenance4. Enhanced flashings 5. Vapor retarders
1. Enhanced system durability / redundancy2. Consider other durability factors
1. Expanded maintenance plan2. Enhanced initial durability / redundancy3. Best combination of initial durability and
ongoing maintenance
ROOFLIFE Factors / Options
Durability
PotentialImpacts
Reduced Service Life
ROOFLIFE Factors / Options
Environment
Factor
Urban Heat Island Effect
Storm Water Runoff
Solid Waste
Ozone*
Available Options
“Cool” Roofs 1. Reflective Roofs 2. Vegetated Roofs 3. Cool Ballasted Roofs
1. Roof Water for Landscaping2. “Green” Roofs a. Vegetated Roofs b. Hybrid Ballasted / Vegetated Roofs
1. Renewable / Recyclable Materials2. Re-Usable Roofing Materials
1. “Cool” Roofs (See above)2. Low-VOC Adhesives and Sealants
Potential Impacts
Increased TemperatureIncreased Air PollutionIncreased Energy Use
Water Pollution
Expanding LandfillsToxic Emissions
Air Pollution
* Ground Level
Issue (Factor)
Design Accountability
Installation Accountability
Ongoing Accountability
Available Options
1. Energy Use Planning2. Life Cycle Assessment3. Durability Planning
1. Quality Management System (TQM)
2. Roof Commissioning
1. Maintenance Plan & Schedule2. Continuous Commissioning
ROOFLIFE Factors / Options
Accountability
Potential Impacts
Suboptimal designincreases environmental impact
Plannedimpact reductions not achieved
Plannedimpact reductionsnot maintained
The ROOFLIFE Model
Options & Resources
Options
Thermal Efficiency
“Cool” Roofing
“Green” Roofing
Clean Energy Roofs
Roof Recycling
Durability
Accountability
Available Resources (Partial Listing)
NRCA / CEIR EnergyWise CalculatorASHRAE 90.1 / 189.P
DOE Cool Roof CalculatorCRRC Cool Roof Database
GRHC “GreenSave” Calculator
NREL “PVWatts” Calculator“eQuest” Skylighting Design Calculator
Industry Database for Recycling Programs?
FM Global Hail MapORNL / WUFI Vapor Transmission Calculator
Athena Institute “EcoCalculator”NRCA Roof Maintenance & Repair Manuals
