The decision should start with the condition and location of the problem rather than with a sales pitch for either option.
Is the damage isolated?
A localized flashing problem or small damaged area is different from deterioration across multiple roof planes.
Consider the age and condition together
Age alone does not determine replacement, but an older roof with repeated symptoms deserves a broader evaluation than a newer roof with one repairable issue.
Get a written repair scope
Ask what the repair fixes, what it does not fix, how long it is expected to perform and what workmanship warranty applies.
Compare against a replacement budget
Use the Roof Replacement Cost Calculator to understand the scale of full replacement before deciding whether repeated repair spending makes sense.
Seek more than one opinion
When the answer is unclear or expensive, compare findings from qualified local roofing professionals.