A drip from a skylight during a Brooklyn rainstorm is one of the most stressful things a homeowner can see — and one of the most misunderstood. The good news: most skylight leaks aren't the glass failing, and many are repairable. Here's what actually causes them, how to tell the skylight from the roof, what to do right now, and when it's smarter to replace than repair.
Nine times out of ten, it's not the glass — it's everything around the glass:
This trips a lot of people up. Water can enter the roof uphill of the skylight and run down to show up at the skylight opening, making a roof problem look like a skylight problem. And condensation can mimic a leak. Because the entry point is often not where the stain appears, the reliable answer comes from inspecting the flashing, the seals, and the surrounding roof together.
💡 Quick tell: if water shows up mainly during rain or snowmelt, it's likely a true leak (flashing/seal/roof). If it appears on cold, humid days with no rain, it's probably condensation — which is solved with ventilation and humidity control, not roofing repair.
| Repair usually makes sense when… | Replace usually makes sense when… |
|---|---|
| The glass & frame are sound | The unit is old and near end of life |
| The problem is flashing or sealant | The glazing seal failed / glass is fogged |
| A gasket or seal is worn | The frame is cracked or rotted |
| The surrounding roof is in good shape | You're already replacing the roof around it |
If you're re-roofing anyway, that's the ideal moment to reset or upgrade a skylight properly — the flashing gets integrated into the new roof from the start.
We inspect the flashing, seals, and the surrounding roof to pinpoint exactly where water is getting in, then tell you honestly whether it's a repair or a replacement — with a written, itemized quote. Serving Brooklyn, Queens, Manhattan, Staten Island, the Bronx, and Long Island.
📞 (516) 713-9199 Get a Free EstimateUsually the flashing where the skylight meets the roof — not the glass — especially after freeze-thaw winters. Other causes: worn seals/gaskets, cracked glazing, debris damming water above it, or improper installation. Water on cold humid days with no rain is condensation, a different issue.
Either — and they're often confused. Water can enter the roof uphill and run to the skylight opening, or the skylight's flashing and seals can be the source. Since the entry point often isn't where the stain shows, inspecting the flashing, seals, and surrounding roof together is the reliable way to find it.
Many leaks are repairable when the glass and frame are sound and it's a flashing, sealant, or gasket issue. Replace when the unit is old, the glazing seal failed and fogged, the frame is cracked or rotted, or you're re-roofing anyway — the ideal time to reset it properly.
Protect inside with a bucket, move or cover items, and dry the area to prevent mold. Don't climb a wet roof. Note when it drips — rain, snowmelt, or cold humid days. Then get the flashing, seals, and roof inspected before the next storm, since a small leak can rot the deck around the opening.