Leak Around a Skylight or Chimney: What to Do
Water dripping down a skylight shaft or staining the ceiling beside the chimney, often in heavy rain or a thaw. Here is what it usually means, whether it is an emergency and what to do now. One call connects you with a local crew, any hour.
A leak around a skylight or chimney usually means the flashing that seals the opening to the roof has failed, though condensation on skylight glass and ice backing up around the opening can look the same. It is urgent when water reaches electrical fixtures or the ceiling sags. Catch the water, dry the trim and call (203) 555-0163 to reach a local crew that finds the wet areas and dries them.
Where This Water Usually Comes From
- Most common
Worn or loose flashing
Metal flashing seals the joint where a skylight or chimney meets the roof, and on older roofs it bends, rusts or pulls away. If the leak shows up mainly during wind-driven rain and runs down one side of the opening, flashing is the usual suspect.
- Cause 2
Condensation on skylight glass
In cold weather, warm moist air hits the cold glass and frame and turns to water, which then runs down the shaft. If the drips appear on cold mornings with no rain and the glass is fogged or wet inside, condensation is likely.
- Cause 3
Ice and snow packed around the opening
Snow piles up on the uphill side of a chimney or skylight, and melt can refreeze around the curb and back up under the shingles. A leak that only happens during thaws after a snowstorm points here.
- Cause 4
Chimney masonry or cap problems
Cracks in the chimney crown, missing mortar or an open top let rain soak into the brick and run down inside. Damp stains on the chimney breast inside, or water in the firebox, often mean the water is coming through the masonry rather than the flashing.
Is It an Emergency?
Call now if
- Call now if the ceiling around the skylight or chimney is sagging, cracked or holding water.
- Call now if water is reaching a light, fan, outlet or wiring in the skylight shaft or nearby wall.
- Call now if water is running down the chimney breast into a finished room or the fireplace.
- Call now if the stain is spreading along the ceiling or into the room below.
- Call now if the leak is in a condo or apartment and the unit below is getting wet.
It can usually wait a few hours if
- It can usually wait a few hours if only a few drops show up on the skylight trim.
- It can usually wait a few hours if the rain has stopped and the drip stopped with it.
- It can usually wait a few hours if the water is clearly condensation and wiping the glass stops it.
- It can usually wait a few hours if the ceiling and drywall around the opening are dry and firm.
Still call today: hidden moisture keeps spreading while it waits.
What to Do Right Now
- 1Protect the floor Put a towel and bucket under the skylight or along the chimney wall, and move rugs, furniture and electronics out of the drip path.
- 2Cut power to wet fixtures If a light, fan or switch near the opening is wet, turn that circuit off at a dry breaker panel and do not use it until it has been checked.
- 3Do not use the fireplace If water is coming into the firebox or down the chimney breast, stop using the fireplace or stove until the chimney has been looked at.
- 4Wipe and watch the glass Dry the skylight glass and frame, then check an hour later. Water back on the glass with no rain outside points to condensation, not a roof leak.
- 5Stay off the roof Do not climb up to look at the flashing, especially on a wet, snowy or icy roof. Leave the roof to a roofer and look from the ground with binoculars if you want a view.
- 6Photograph and call Take photos of the stain, the trim and any drip pattern, note the weather when it leaked, and call (203) 555-0163.
How a Crew Finds the Source and Fixes It
Skylight and chimney leaks can be tricky because water often enters at one corner and runs along a rafter or the shaft framing before it shows. Technicians check the drywall in the shaft, the ceiling around the opening and the framing in the attic with moisture meters, then scan with a thermal camera to see how far the wet area spreads. For chimneys they also read the walls beside the chimney breast and the ceiling where the chimney passes through. Weather notes from the homeowner, such as rain only or cold mornings only, help separate a flashing leak from condensation.
Inside, the fix is drying and repair. Wet drywall in the shaft or ceiling is cut back where it is soft or stays wet, insulation in the attic around the opening is replaced if it is soaked, and the area is dried with dehumidifiers and air movers. Stained trim is sanded or replaced once dry. The flashing, the skylight unit or the chimney masonry is work for a roofer or mason, and the crew can describe where the water came in. If condensation is the cause, the crew can point out the humidity and fan habits that keep the shaft dry next winter.
- 1
Trace the water path
Technicians read the shaft, ceiling and attic framing with moisture meters to follow water from where it shows back toward the corner where it enters the opening.
- 2
Scan with thermal imaging
A thermal camera shows cold, damp areas in the ceiling and walls around the skylight or chimney, so only the truly wet sections need to be opened.
- 3
Rule out condensation
The crew compares readings with the weather when it leaked, since water on cold mornings without rain usually points to condensation rather than a flashing failure.
- 4
Open and dry
Soft or soaked drywall and insulation around the opening are removed, then dehumidifiers and air movers dry the shaft framing and ceiling until readings come down.
- 5
Repair the finish
Drywall, trim and paint are restored once everything reads dry, and notes on the entry point are passed along for the roofer or mason to fix the flashing.
How to Keep It From Happening Again
- Have flashing checked as the roof ages. Ask a roofer to look at skylight and chimney flashing whenever the roof is inspected or reshingled, since older flashing is a common failure point.
- Keep the chimney crown and cap in shape. A sound crown and a cap on top keep rain out of the masonry. Cracks let water soak in and run down inside.
- Lower indoor humidity in winter. Running bath and kitchen fans that vent outdoors, and not over-humidifying, keeps less moisture reaching cold skylight glass.
- Watch the uphill side after snow. After a heavy storm, look from the ground at the snow piled above the chimney and skylight. Ice forming there is a sign to keep an eye on the ceiling below.
- Look at the shaft after storms. After a wind-driven rain, check the skylight shaft corners and the chimney breast for new stains. Catching a small leak early keeps the repair small.
What It Costs
A leak detection visit typically runs $150 to $500, and a thermal imaging or moisture inspection $200 to $600, when the entry point is hard to pin down. Ceiling repair after a leak usually falls between $400 and $2,000, and drywall removal and replacement in the shaft runs $2 to $6 per sq ft. Larger jobs with interior mitigation after a roof leak run $1,000 to $5,000. General market ranges, not quotes.
How Long It Takes
A skylight shaft or chimney wall usually dries in 2 to 4 days once the leak is stopped or the weather turns dry. Drywall, trim and paint repairs typically take a few more days.
Call (203) 555-0163Leak Around a Skylight or Chimney in Connecticut
Connecticut gets rain and snow in every month, about 47.1 in a year at Hartford and 53.0 in at Danbury in Fairfield County, so a weak skylight or chimney seam has plenty of chances to leak. Many homes are decades old, with a statewide median build year of 1967, and older roofs usually mean older flashing. In New London County, housing in the city of New London has a median build year of 1945. Litchfield County adds heavy snow, about 74.9 in a year at Norfolk, which piles up behind chimneys, while Fairfield County roofs also take nor'easter wind-driven rain.
When you call (203) 555-0163, tell us whether the leak is at a skylight or the chimney, what the weather was and whether any fixtures are wet. We connect you with an independent local restoration pro for your town, and the crew comes out to trace and dry the leak. If the chimney is involved, mention whether you use the fireplace or a stove, since that changes what the crew checks first.
Leak Around a Skylight or Chimney FAQs
Why does my skylight leak only in winter?
Winter leaks are often condensation, where warm indoor air hits the cold glass and turns to water. Ice and snow packed around the curb during a thaw can also back water under the flashing.
Why is there water around my chimney but no hole in the roof?
Water can enter at the flashing or through cracked masonry and run down the outside of the chimney inside the attic, then show up as a stain on the ceiling or chimney breast below.
Is a skylight leak an emergency?
It is if the ceiling sags, water reaches wiring or lights, or the stain is spreading fast. A few drops on the trim after a storm can usually wait for a scheduled visit, but should not be ignored.
Can I seal a leaking skylight from inside?
Caulking the inside trim does not stop water entering from the roof, and it can trap moisture in the shaft. Dry the inside, leave the roof to a roofer and call to have the wet areas checked.
Does a chimney leak mean I should stop using the fireplace?
Water in the firebox or a wet chimney breast is a reason to stop using the fireplace until a chimney professional has looked at it. The restoration crew dries the wall and ceiling around it.
Who do I call about leak Around a Skylight or Chimney in Connecticut?
Call (203) 555-0163 any time. Calls are answered 24/7 in Fairfield County, Hartford County, Litchfield County, Middlesex County, New Haven County, New London County, Tolland County, Windham County, and you are connected with a local crew that can find the source and dry it out.
Other Attic and Roof Problems
- Ice Dam Leaking Into the HouseWater staining the top-floor ceiling near the eaves while thick ice and icicles hang off the roof edge.
- Water Dripping in the AtticWater dripping from the roof boards or rafters in the attic, or wet spots showing up on top of the insulation.
- Roof Leak After a StormWater coming through the ceiling during or right after a heavy rain, nor'easter or high wind.
Leak Around a Skylight or Chimney? Call Now.
Calls answered 24/7. One call connects you with a local crew to find the source and start drying.