Skylight Leak Repair: Emergency Fixes for Houston Homes
A full roof replacement on a 2,000 sq ft Houston home runs $9,500–$16,000. Fixing a leaking skylight usually costs a small fraction of that — because most of the time, the skylight itself isn't the problem. The flashing around it is.
I've fixed skylight leaks all over Humble and Pearland, and the story is nearly always the same: water dripping from the skylight frame, homeowner assumes the whole unit is shot, and the real culprit turns out to be ten dollars' worth of failed sealant or flashing that pulled away years ago. Here's how to stop the water today and fix it right.
First: Stop the Water (Emergency Fixes)
Water coming through a skylight feels urgent because it's landing on your floor, not hiding in an attic. Do this right now:
Contain it. Bucket under the drip, towel around the base. If water is running down the wall, pull furniture away — drywall soaks fast and paint bubbles within hours.
Don't caulk the inside and call it done. A bead of caulk along the interior frame might slow the drip, but it traps water inside the assembly where it rots wood silently. Interior caulk is a weekend bandage at best.
If heavy rain is coming, cover it from outside. A secured tarp over the skylight keeps the next storm out while you arrange the real repair. Our emergency tarping team does this regularly — a skylight is just another roof penetration that needs temporary cover.
Why Skylights Really Leak
Forget the glass for a minute. A skylight is a hole cut in your roof with a box sitting in it, and every edge of that box is a place water wants in. Ranked by how often I see them:
1. Failed flashing. The metal flashing woven into the shingles around the skylight curb lifts, cracks, or separates. Houston's heat cycles expand and contract that metal thousands of times until the seal gives up. This causes the large majority of skylight leaks I inspect.
2. Dead seals and gaskets. The rubber seals between the skylight frame and the glass dry out and shrink. You'll see this on units past the 10–15 year mark — water weeps through the frame joints rather than around the curb.
3. Condensation mistaken for a leak. In Houston humidity, warm indoor air hits the cooler skylight glass and condenses — especially in winter mornings or over-steamy bathrooms. If the "leak" only appears as moisture on the glass with no water in the frame or ceiling, you may have a ventilation issue, not a roof issue.
4. Clogged weep holes. Many skylights have tiny drainage channels that clog with debris. Water backs up and overflows inside instead of draining out.
Repair, Re-flash, or Replace the Unit?
| Reseal | Re-flash | Full Skylight Replacement | |
|---|---|---|---|
| What it is | New sealant around flashing and frame | Remove shingles around curb, install new flashing kit | New skylight unit plus new flashing |
| Fixes | Minor seal gaps, early-stage leaks | Failed or improperly installed flashing | Fogged glass, rotten curb, unit past its life |
| Lasts | 1–3 years | As long as the surrounding roof | 15–20+ years with a new unit |
| Choose it when | Leak just started, flashing looks intact | Flashing is the clear culprit (most cases) | Glass is fogged between panes or frame is rotted |
My practical rule: if the glass is clear and the frame is solid, re-flash it. A proper re-flash — shingles pulled back, step flashing woven in correctly, curb sealed — solves the leak for the remaining life of the roof. Replacing the whole unit when only the flashing failed is paying for a new engine when you needed a gasket.
Curb-Mounted vs. Deck-Mounted: Why It Matters
Two skylight styles dominate Houston homes, and they leak differently. Curb-mounted skylights sit on a raised wood box (the curb) above the roof deck. They shed water well but have more flashing seams — more seams, more places to fail. Deck-mounted skylights sit nearly flush with the roof and rely on a factory flashing kit integrated with the shingles. When that kit is installed right, they're tight; when a previous roofer improvised the flashing instead of using the kit, they leak from day one.
If you're getting a skylight repair, ask which type you have. The fix for a curb-mounted unit centers on the curb flashing; the fix for a deck-mounted unit usually means pulling the factory kit and doing it properly.
The Condensation Trap
Before you spend money, rule this out: tape a piece of foil over the inside of the skylight glass overnight. If moisture forms on the room side of the foil by morning, that's condensation — your warm, humid indoor air meeting cool glass. The fix is ventilation and humidity control (run the bath fan longer, check the HVAC), not roofing work. If the foil's roof side is wet or water is in the frame, you've got a real leak. This five-minute test has saved plenty of Pearland homeowners from paying for a repair they didn't need.
Can I just caulk around my leaking skylight?
As a stopgap, yes — as a fix, no. Caulk on the outside buys you a little time, but water finds its way behind surface sealant, and caulk on the inside just traps water inside the frame where it rots wood unseen. The lasting repair is re-flashing: pulling back the surrounding shingles and installing proper step flashing around the curb. Anything less is postponing the same leak.
Does homeowners insurance cover skylight leak repair?
Sometimes — it hinges on the cause. If a storm ripped flashing loose or hail cracked the unit, that's sudden damage and typically covered, with most homeowners paying only their insurance deductible. If the leak comes from worn seals or age, carriers usually call it maintenance and deny it. Document the damage with photos before anything is touched, and never let anyone offer to waive your deductible — that's illegal in Texas under House Bill 2102.
Skylight leaks after storms are common enough that they're part of our regular storm damage inspections — flashing takes a beating in high wind, and the skylight curb is often where it shows first.
Frequently Asked Questions
How long do skylights last?
The unit itself — glass and frame — typically holds up 15 to 20 years, roughly matching an asphalt shingle roof's 15–20 year life in Houston. The flashing and seals around it usually give out sooner, often in the 8–12 year range. That's why most skylight "failures" are really flashing failures, and why a re-flash can add a decade to a skylight that still has good glass.
Should I just remove the skylight instead of fixing it?
Sometimes that's the smart move. If the skylight is old, the glass is fogged, and the surrounding roof needs work anyway, deleting it during a re-roof is clean and permanent — one less penetration to maintain. But if the unit is sound and only the flashing failed, removal is overkill. A proper re-flash costs far less than reframing and decking over the opening, and you keep the natural light.
Can a skylight leak rot my roof decking?
Yes, and it's the part homeowners miss. Water entering around the curb soaks the decking boards around the opening first — exactly where you can't see it from inside. By the time the ceiling stains, the wood around the skylight may be soft. During any skylight repair, the decking around the curb should be checked by hand; spongy wood gets cut out and replaced before the new flashing goes on.
What does a proper skylight leak repair involve?
Shingles come back several feet around the skylight, the old flashing and sealant come off, and the curb and surrounding decking get inspected for rot. Then new step flashing is woven into the shingle courses around the curb, sealed correctly, and the shingles are reinstalled. It's methodical work — the kind that looks boring and holds for years. Rushed jobs that just smear sealant over the old flashing are why the same skylight leaks again next spring.
Frequently Asked Questions
How long do skylights last?
The unit itself — glass and frame — typically holds up 15 to 20 years, roughly matching an asphalt shingle roof's 15–20 year life in Houston. The flashing and seals around it usually give out sooner, often in the 8–12 year range. That's why most skylight "failures" are really flashing failures, and why a re-flash can add a decade to a skylight that still has good glass.
Should I just remove the skylight instead of fixing it?
Sometimes that's the smart move. If the skylight is old, the glass is fogged, and the surrounding roof needs work anyway, deleting it during a re-roof is clean and permanent — one less penetration to maintain. But if the unit is sound and only the flashing failed, removal is overkill. A proper re-flash costs far less than reframing and decking over the opening, and you keep the natural light.
Can a skylight leak rot my roof decking?
Yes, and it's the part homeowners miss. Water entering around the curb soaks the decking boards around the opening first — exactly where you can't see it from inside. By the time the ceiling stains, the wood around the skylight may be soft. During any skylight repair, the decking around the curb should be checked by hand; spongy wood gets cut out and replaced before the new flashing goes on.
What does a proper skylight leak repair involve?
Shingles come back several feet around the skylight, the old flashing and sealant come off, and the curb and surrounding decking get inspected for rot. Then new step flashing is woven into the shingle courses around the curb, sealed correctly, and the shingles are reinstalled. It's methodical work — the kind that looks boring and holds for years. Rushed jobs that just smear sealant over the old flashing are why the same skylight leaks again next spring.