Roof Warranty Comparison Calculator
Total cost of ownership across roofing warranty types.
Inputs
%
Results
Material Only — Total ($)
$91,050.00
Material Only — $/Year$3,642.00
System Warranty — Total ($)$90,828.00
System Warranty — $/Year$3,633.00
NDL Warranty — Total ($)$54,201.00
NDL Warranty — $/Year$2,168.00
Best Value (0=Mat, 1=Sys, 2=NDL)2
Savings: Best vs Worst ($)$36,849.00
How to Use This Calculator
- Enter roof area (sqft) and base install cost ($/sqft).
- Set analysis period (years) and discount rate (%) for NPV comparison.
- Review material-only, system warranty, and extended warranty total costs and annual equivalents.
- Compare NPV of each warranty option to determine the most cost-effective coverage.
- Manufacturer warranties require certified installers -- verify contractor certification before selecting.
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