Age alone doesn’t determine whether to repair or replace a chimney. A well-maintained 50-year-old chimney may need only minor work, while a 20-year-old chimney with serious structural issues might require complete rebuilding.
Consider repairs when:
- Damage affects less than 25% of the structure
- The foundation remains sound
- You plan to stay in the home for at least 5-10 years
Consider a replacement when:
- Repair costs exceed 50% of replacement cost
- Multiple major systems need work simultaneously
- Structural integrity is compromised
Long-term home ownership changes the calculation. If you’re planning to sell within a few years, minimal repairs that ensure safety might make more financial sense than expensive restoration work.