Check every assumption
The default costs, service lives, and maintenance amounts are illustrative. They are not measured local averages or product guarantees. Replace them with the actual bid and manufacturer guidance for the roof you are considering. Compare the installation scopes for metal and cedar before using either scenario.
Compare two ownership scenarios
Replace these example inputs with bids and your own maintenance and replacement assumptions. The options are not tied to a material or neighborhood. Actual service life depends on the installed roof and its condition.
Option 1
Scenario total: $38,000
$1,520 per year over 25 years. Includes one assumed replacement.
Option 2
Scenario total: $30,000
$1,200 per year over 25 years. No replacement included.
Formula: bid + annual maintenance × ownership years + one replacement if its assumed year falls within the period. This simple comparison excludes financing, discounting, inflation, energy savings, and resale value. Include known permit and project fees in your bid input.
Keep the scope consistent using a roofing bid comparison, and discuss maintenance needs for metal or replacement shingles with the installer.