1. SUSTAINABLE ROOFING ENVIRONMENT ENERGY DURABILITY ACCOUNTABILITY The ROOFLIFE Sustainable Roofing Decision Model:

2. 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.

3. Design Factors 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 Reduced Environmental Impact Identify… 1 2 3 4 5 6 The ROOFLIFE Model The ROOFLIFE Decision Model

4. The ROOFLIFE Model Key Factors & Options Key Factors Energy Durability Environment Accountability Key Options Reduce Energy Use Produce Clean Energy Anticipate Extreme Events Establish a Life Cycle Plan Reduce Impact Validate & Manage the Life Cycle

5. Factor Thermal Efficiency Peak Energy Demand Clean Energy Production Available Options 1.Increased Thermal Insulation 2.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 Daylighting 2. Photo-Voltaic Roofing 3. Solar Thermal Roofing ROOFLIFE Factors / Options Energy Potential Impacts Energy Use / Greenhouse Gas

6. 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 systems 2. Enhanced wind-resistance systems 3. Enhanced surfacing / maintenance 4. Enhanced flashings 5. Vapor retarders 1. Enhanced system durability / redundancy 2. Consider other durability factors 1. Expanded maintenance plan 2. Enhanced initial durability / redundancy 3. Best combination of initial durability and ongoing maintenance ROOFLIFE Factors / Options Durability Potential Impacts Reduced Service Life

7. 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 Landscaping 2. “Green” Roofs a. Vegetated Roofs b. Hybrid Ballasted / Vegetated Roofs 1. Renewable / Recyclable Materials 2. Re-Usable Roofing Materials 1. “Cool” Roofs (See above) 2. Low-VOC Adhesives and Sealants Potential Impacts Increased Temperature Increased Air Pollution Increased Energy Use Water Pollution Expanding Landfills Toxic Emissions Air Pollution * Ground Level

8. Issue (Factor) Design Accountability Installation Accountability Ongoing Accountability Available Options 1. Energy Use Planning 2. Life Cycle Assessment 3. Durability Planning 1. Quality Management System (TQM) 2. Roof Commissioning 1. Maintenance Plan & Schedule 2. Continuous Commissioning ROOFLIFE Factors / Options Accountability Potential Impacts Suboptimal design increases environmental impact Planned impact reductions not achieved Planned impact reductions not maintained

9. 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 Calculator ASHRAE 90.1 / 189.P DOE Cool Roof Calculator CRRC Cool Roof Database GRHC “GreenSave” Calculator NREL “PVWatts” Calculator “eQuest” Skylighting Design Calculator Industry Database for Recycling Programs? FM Global Hail Map ORNL / WUFI Vapor Transmission Calculator Athena Institute “EcoCalculator” NRCA Roof Maintenance & Repair Manuals