1. The Greening of the Rooftop
Why Roof Green?

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

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

4. … 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

5. 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

6. 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

7. Energy Scenarios The Present (At best)
Why Roof Green?
Energy Scenarios
The Present (At best)
ASHRAE
“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

8. 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.

9. 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. $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)

11. 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

12. Renewable Energy Production
Why Roof Green?
Renewable Energy Production

13. 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)

14. 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

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

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