How to Repair a Leaking Skylight

I had my roof reshingled and the skylight len replaced, but my skylight is still leaking. Is there was some sort of sealant I can apply to fix it? -Robert

Hi Robert,

There are several possibilities as to why your skylight is leaking. The leak might not be a leak at all, but the result of condensation forming on the inside of the glass during cold weather. It could also be caused by an unrelated roof leak above the skylight that is finding its way out through the ceiling opening around the skylight.

If the leak appears to be coming from the skylight itself, start by cleaning around the skylight to remove any leaves or debris. Next, examine the exterior of the skylight and flashing carefully for any gaps or flashing that may have been improperly installed.

If you still can’t find the source of the leak, use a garden hose to try and reproduce the leak and narrow it down. Is the water coming from the lens, the frame, or the flashing around the skylight?

Depending on the location of the leak, you may need to:

  • Use roofing cement (can or tube) to seal any gaps or holes in the flashing.
  • Apply 100% silicone caulking (tube) to seal leaks around the skylight lens.
  • Replace or repair the metal flashing around the frame of the skylight.

Try making the easier repairs with roofing cement or silicone caulking first before tackling more difficult fixes, like replacing the flashing.

Good luck with your project,


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17 Comments on “How to Repair a Leaking Skylight”

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  • Official Comment:

    Thomas Boni Says:
    May 1st, 2019 at 2:35 pm

    Hi, Allan,
    We believe just about anything can be renovated!
    A professional skylight repair company can identify and fix any issues, whether the origin is the frame or the glass.
    The question is whether it’s more cost-effective to fix the skylight or to just go ahead and replace it.
    Only you can make that decision, so we recommend getting quotes for both options (to fix the unit and to repair the unit), and then proceeding with what makes you comfortable.
    Good luck!

  • Allan Says:
    April 19th, 2019 at 5:39 pm

    There is small drop of water coming near my skylight . The skylight is on flat roof . It is between the two roof. Also skylight is very close to the facia of other roof. . My skylight is 40 year old never been replaced . The water only come when it is raining but it come after lot of rain there is some water always there on top of roof . Should I change my skylight and what kind of material should I put around the skylight . I am in Vancouver it rains here a lot . Please advise .

  • Official Comment:

    Thomas Boni Says:
    April 3rd, 2019 at 4:32 pm

    Hi, Lucia,
    We believe just about anything can be renovated!
    A professional skylight repair company can identify and fix any issues, whether the origin is the frame or the glass.
    The question is whether it’s more cost-effective to fix the skylight or to just go ahead and replace it.
    Only you can make that decision, so we recommend getting quotes for both options (to fix the unit and to repair the unit), and then proceeding with what makes you comfortable.
    Good luck!

  • Lucia Lim Says:
    March 26th, 2019 at 3:07 pm

    I am 70 yrs. old and have a leaky skylight over our family room. Luckily it wasn’t too bad and didn’t get the floor wet. The skylight is 30 yrs. old and was wondering if it’s too old to be repaired. Our renevator is not in a hurry to get a roofer over to take a look at it due to our rainy weather. They did tarp the skylight, removed the debris of wet dry wall & dried out the damp area. But it’s over 6 weeks and we’ve got a hole in our ceiling covered by plastic waiting for them to finish the project. Can they fix it or do I need to replace the skylight ?

  • Official Comment:

    Thomas Boni Says:
    November 28th, 2018 at 11:19 am

    Hi, Tatyana!
    We recommend submitting questions involving unique situations like yours to the Today’s Homeowner Radio Show.
    Please use this form to contact Danny Lipford, America’s Home Expert, directly:
    Take care!

  • Tatyana Says:
    November 23rd, 2018 at 10:01 am

    I have skylight. We changed our roof. Find out water drip down to the floor. When it rains no water is coming in. Maybe condensation (different temp. inside and outside). What causes this problem &what can be done.

  • tony antonakis Says:
    October 28th, 2018 at 6:27 pm


  • Mark Says:
    July 30th, 2017 at 11:06 am

    I just finished fixing some skylights on my parent’s house. They had the bubble type that started leaking after the roof was resurfaced. After investigating it carefully, it became apparent that when the roof was resurfaced, the edges of the skylight were covered with a sealant. (To help prevent leaks perhaps?)

    The problem was that this coating sealed up the weep slots along the perimeter of the aluminum frame. These slots are key to proper operation of the skylight. The skylight dome isn’t sealed to the aluminum frame. The frame is designed with channels that direct any water that manages to flow between the bubble and the frame back out through weep holes.

    Make sure those weep holes are clear! They can be blocked by dirt, ice, or a well-intentioned roofer.

  • tish Says:
    January 5th, 2017 at 7:37 pm

    HELP! I live in MN and the temps are -0 and my sky light is leaking. The sky light man can’t get up to the roof due to ice and snow, Is there anything I can do from the inside. I am a single 68 year old woman who needs to rely on pro’s to do this work. Any suggestions? I could use all the help I can get.. Thanks Tish

  • Edmund Lee Says:
    January 2nd, 2017 at 6:53 pm

    Hi Danny, Just had two skylights in bathrooms on a slop roof replace with a new roof & found out I think when taking a shower or bath the steam goes to the skylight. This in turn causes water to drip down to the floor because it may cause condition maybe air is leaking in. When it rains no water is coming in, so what causes this problem & what can be done.
    Edmund Lee

  • CHETHAN Says:
    May 19th, 2016 at 4:08 am

    Hi Am an architect, one of project we got leakage problem, its very hot area in summer between April to May it reaches 40 to 45 degree temperature. The skylight which we have given is one side its is inserted to 1 1/2″ deep, this is upper end, lower end is free, skylight size is 1 1/2″ x 18′. There is joint in glass too. We have applied sealant and other waterproof materials still its coming out. When it rains at few point, please anyone recommend me the solution.

  • maggie Says:
    January 23rd, 2016 at 7:00 am

    sun roof extension… rubber roof installed (shingled as well????) flashing also installed (2 years ago.).. now have drip from ceiling fixture.. ironically this was not the reason for the roof replacement….. no attic access … roofers (2) could not locate source of leak… tarred entire roof.. still have drip from fixture.. now what????

  • Joe Colcasure Says:
    August 22nd, 2015 at 9:14 pm

    Our skylights were functioning without problems until we had roof shingles replaced. Now we have marked leakage from 2 of our 3 skylights. We had some leakage in years past but I resolved personally with application of silicone paste around the periphery of the skylight. They have been functioning without lead for over a year until we had the roof repaired. After roof repair, we now have marked leakage from two of the three skylights.

    Contractor says that skylights are not his reponsability and that the skylights are old—bubble type and need top be replaced–which he will be happy to arrange. I have stated that the skylights were not leaking prior to his repair. The skylights now leak after his repair. I believe it his reponsability to leave the roof completely water repellant after his repair as it was before his repair.
    Your comments?

  • CHETHAN Says:
    May 19th, 2015 at 7:15 am

    we have 4 skylights. One end glass is fixed to wall, other end is free end. We used lot of silicon and there is leakage. How to solve this? Please help with best materials and best methods.

  • Randy Says:
    January 2nd, 2015 at 11:50 am

    The sky light only leaks when there is frost or ice etc. When it rains the sky light doesn’t leak at all. When frost is gone no leaking, one corner only (bottom). Any fixes for this???

  • cindy flanders Says:
    August 28th, 2011 at 11:49 am

    trying to find an episode, i think you did on the weather channel on replacing a skylight and how to flash around it, could you supply information on how to view this again?

  • Alma Says:
    June 21st, 2010 at 7:46 am

    I have sky lights & they do not leak.But they make the room really hot in the summer.You can tell a temperature difference from the other rooms that do not have sky lights.Also they fade the furniture.The sky lights are new & they are not glass.Please help.
    Hot in South Carolina

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How to Repair a Leaking Skylight