Short Answer
Not always. But roof replacement is an appropriate time to evaluate their condition because access is easier and flashing interfaces can be addressed as part of the roof system.
Detailed Explanation
During a roof replacement, the old roofing around skylights is removed, providing full access to the skylight flashing and frame. This is the ideal time to evaluate whether the skylight needs replacement. If the skylight is relatively new and in good condition, it can typically be reflashed and integrated with the new roofing system. If the skylight is old, showing signs of deterioration, or has a history of leaking, replacing it during the roof project is usually more cost-effective than doing it separately later, because the scaffolding, tear-off, and access are already in place. Even if the skylight isn't replaced, the flashing should be evaluated and replaced if deteriorated.
Why It Matters
Evaluating skylights during roof replacement can save money and prevent future leaks. Skipping the evaluation may mean missing problems that will cause leaks after the new roof is installed.
When Repair Makes Sense
Skylight is in good condition and only needs reflashing to integrate with the new roof.
When Replacement Makes Sense
Skylight is old, deteriorated, or has a history of leaking, and replacing it during the roof project is more cost-effective than separately.
Questions to Ask Your Contractor
- ?How old are my skylights?
- ?Are they in good condition or should they be replaced?
- ?Will the flashing be replaced as part of the roof project?
- ?What's the cost difference of replacing skylights now vs. later?