The Greening of the Rooftop Why Roof Green?

Why Roof Green? Few Major Building Systems Can Provide As Many Energy & Environmental Benefits …

Why Roof Green? Increased Energy Efficiency Renewable Energy Production Cleaner Air & Water Extended Building Life Cycle Reduced Material Impacts

… And Few Major Building Systems Are Installed as Frequently as Roofs Why Roof Green? … And Few Major Building Systems Are Installed as Frequently as Roofs

Why Roof Green? Each year, 4 billion square feet of commercial roofs are installed in the U.S. … 1 Billion Sq. Ft. New Construction 3 Billion Sq. Ft. North American Low-Slope Roofing Market (Billions of Square Feet, 2006) Re-Roofing … exceeding new commercial construction by a factor of 4! Source: Roofing Industry Consensus Data

Multiple Ways to Save Energy Why Roof Green? Energy Efficiency Multiple Ways to Save Energy Cool Roof Membranes Reduce Solar Loads 1 2 High “R” Insulation Reduces Energy Loss 3 Industry Best Practices Minimize Energy Waste 1 2 3

Energy Scenarios The Present (At best) Why Roof Green? Energy Scenarios The Present (At best) ASHRAE 90.1-1999 “Energy Standard for Buildings…” Basic roofing “R” values unchanged since 1973 A Greener Future (What we can do) ASHRAE 189.P (Proposed) “Standard for the Design of High-Performance Green Buildings…”” 67% average increase in minimum roof “R” values

Energy Scenarios Why Roof Green? Present Green Future $186 Million Insulation R Value2 Cool Roof Usage3 Best Practice Usage4 Gross Heating Cost Gross Cooling Cost Cool Roof Adj. Best Practice Adj. Net Energy Cost1 Annual Savings Present R15 25% $306 Million $119 Million (-$13 Million) (-$5 Million) $407 Million Green Future R25 100% $192 Million $71 Million (-$30 Million) (-12 Million) $221 Million $186 Million 1Based on 4 billion square feet roof installations, assuming $0.12/KWH cooling energy cost, $1.00/therm heating energy cost, 2.0 cooling COP, and 75% heating efficiency, 20% of roofs replace existing cool roofs, 5% of roofs installed over unheated spaces, and 20% of roofs installed over non-cooled spaces. Calculations derived using the NRCA EnergyWise Calculator and DOE Cool Roof Calculator. 2Actual R values vary +/- R5, depending on ASHRAE climatic zone. 3A cool roof is defined as a roof offering 50% long-term solar reflectivity or the thermal equivalent for the service life of the roof. 4Best practice defined as 2 or more staggered insulation board layers to minimize thermal loss at board joints.

First Year Savings Total: $186 Million $152 The Green Future Best Practice Cool Roofs $7 $17 Total: $186 Million Increased Insulation $152 First Year Energy Savings: 4 Billion Sq. Ft. of Low-Slope Commercial Roofing Installations (Millions of 2008 Dollars)

$10+ Billion Cumulatively The Green Future Savings After Ten Years $1.8 Billion Annually $10+ Billion Cumulatively Millions of Dollars Increased Insulation Cool Roofing Best Practice Year Potential Energy Savings for Low-Slope Commercial Roofing Installations (2008 Dollars / 4 Billion Sq. Ft. per Year Installed)

Economic Return The Green Future Roofing Cost per Sq. Ft. First Year Capital Cost (4 Billion Sq. Ft.) Incremental Capital Cost Net Annual Energy Cost (2008 Dollars) First Year Energy Savings 20 Year Energy Savings2 Average Annual ROI Present $5.00 $20 Billion $407 Million Green Future $5.50 $22.0 Billion $2.0 Billion $221 Million $186 Million $6.8 Billion 6.3% … plus potential tax deductions under the 2008 Energy Tax Incentives Act ! (1) Cost data provided from survey conducted by TEGNOS Research, Inc. (2) Assumes energy costs will increase 6% annually above non-energy core inflation rate

Renewable Energy Production Why Roof Green? Renewable Energy Production

Renewable Energy Production Why Roof Green? Renewable Energy Production The Rooftops of the United States: Segment: Commercial (Flat) Residential (Steep) Total Energy Potential2 Surface Area1 50 Billion Square Feet 150 Billion Square Feet 200 Billion Square Feet 50,000 Megawatts (10 Grand Coulie Dams) 1Derived from Census data 2Assumes 1watt average solar power production during daylight hours per square foot of suitable roof surface (225 billion square feet total roof surface X 25% suitable usage factor X 1 watt / square foot)

Will Demand for Solar Homes Pick Up? Why Roof Green? Renewable Energy Production November 3, 2008 15% Will Demand for Solar Homes Pick Up? Builders find the savings from cheap power is making solar homes more attractive Estimated minimum pretax annual rate of return for a residential solar system in California and many other states, starting in 2009. By Adam Aston As global financial markets melted down in October, Congress handed a gift to America's green energy industry: It renewed and broadened a set of tax credits for wind and solar power, geothermal, tidal energy, and more. The move did little to prop up eco-energy stocks, which have followed oil prices down. But the news did send a positive jolt to one of the economy's darkest sectors: homebuilding. Or, more specifically, solar-powered homes. Consumers recognize that green homes "save money month in, month out," says Rick

Other Environmental Benefits Why Roof Green? Other Environmental Benefits Daylighting Storm Water Retention Extended Life Cycle Design Heat Island Reduction Material Recycling

Why Roof Green? Increased Energy Efficiency Renewable Energy Production Cleaner Air & Water Extended Building Life Cycle Reduced Material Impacts