Skylights are one of the fastest ways to brighten a home—but they’re also one of the most common sources of chronic roof leaks when they’re installed or repaired incorrectly. If your skylight is dripping, fogging, or staining drywall, the big question is:
Do you repair the skylight, or replace it?
This guide explains the decision in plain language, with the real-world issues we see on Bay Area roofs: wind-driven rain, aging seals, and flashing that was never integrated correctly.
Quick rule of thumb
- Repair is usually best when the skylight unit is in good condition and the problem is flashing, fasteners, or seal integration.
- Replacement is usually best when the skylight has failed glazing, brittle frames, repeated leaks, or is near the end of its service life.
What “skylight repair” really means
A real repair typically focuses on the roof system around the skylight:
- Rebuilding flashing (step flashing, apron flashing, or manufacturer kits)
- Replacing underlayment around the curb/opening
- Re-sealing where appropriate (not as the only fix)
- Addressing roof drainage so water isn’t forced against the unit
Signs you can likely repair the skylight
- The glass is clear (no fogging between panes).
- The frame isn’t warped, cracked, or brittle.
- The leak occurs mainly during wind-driven rain (often flashing-related).
- The skylight is relatively newer and matches the roof’s condition.
Signs replacement is the smarter move
- Fogging between panes (failed insulated glass seal).
- Cracked acrylic dome or yellowed/brittle plastic.
- Multiple “repairs” done with tar/caulk and the leak keeps returning.
- The surrounding roof is being replaced soon anyway.
- Interior drafts or condensation that suggests poor thermal performance.
Why caulk-and-tar fixes fail
Skylights move slightly with temperature changes. Roof systems also expand and contract. Surface sealants rarely survive that movement long-term—especially with UV exposure. A durable fix usually requires correct flashing layers and proper integration with the roofing material.
What to expect during replacement
- Remove the old unit and inspect the curb/opening.
- Replace surrounding underlayment where needed.
- Install the new skylight with manufacturer-approved flashing.
- Reinstall roofing around the unit and verify drainage paths.
Need skylight help?
If you’re seeing stains, bubbling paint, or dripping around a skylight, start with a roof-level evaluation. Visit skylight installation & repair or request an estimate. If it’s actively leaking, consider emergency roof service to prevent interior damage.