Skylight Replacement: When Repairs Are Not Enough
How to tell when a WNC skylight is past repair — and what a proper replacement should include to prevent future leaks.
Key Takeaways
Not every skylight leak is the skylight's fault, and not every failing skylight needs replacement. Here's how to tell the difference.
Signs of Actual Skylight Failure
Fogging between panes. Cracked or hazed exterior dome. Broken seals letting condensation form inside. Visible frame damage. Age past 20–25 years for older units.
Signs of Flashing Failure (Not the Skylight)
Leaks that appear along one side of the frame. Water tracking down the wall below. Sealant that's separated at the flashing edges. These are repair situations, not replacement.
Why Old Skylights Fail
Seals degrade over time from UV and temperature cycling. Older acrylic domes yellow, haze, and crack. Frames corrode where drainage was inadequate.
What a Proper Replacement Includes
New unit sized to the existing opening (or the opening resized if you're upgrading). Manufacturer flashing kit. Ice-and-water shield around the frame. New shingle or panel integration. No reuse of old flashing.
Coordinating With Other Roof Work
If your roof is also aging, doing both together is efficient and gets you a coordinated warranty. See roof replacement.
Ready to Talk About Yours?
Learn more about our roofing services, roof repair for flashing-only fixes, request an inspection, or explore roofing in Cashiers, NC. Related: skylight installation planning guide.
Frequently Asked Questions
Can you replace a skylight without touching the surrounding shingles?
Usually not — proper integration requires lifting shingles around the frame. That's why doing it as part of a re-roof is often most efficient.
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