Cool Roof Calculator
Energy savings from reflective roofing surface.
Inputs
Results
Net Annual Savings ($)
$273
Cooling Savings ($/yr)$326
Heating Penalty ($/yr)$52
Peak Temp Reduction (°F)37
Installation Cost ($)$3,000
Payback Period (years)11
20-Year Net Savings ($)$2,468
How to Use This Calculator
- Enter the roof area (sqft) and current roof SRI (Solar Reflectance Index).
- Set the target cool roof SRI (white coatings: 82+, white TPO: 78+, white metal: 90+).
- Enter your current annual cooling cost ($) and annual heating cost ($).
- Review annual cooling savings, heating penalty, and net annual savings.
- Check peak temperature reduction (F) -- every 10F reduction lowers cooling load ~5-10%.
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