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  1. #1
    Join Date
    Jun 2013
    Posts
    3

    Unhappy Leaking skylight every two years

    I have a three season porch with a peak roof and a skylight on each side of the peak roof. The roof is made of a thin sheet of aluminum four inches of foam, then another thin sheet of aluminum. Every two years I have to unscrew, clean the surface of the roof and the skylight...Re-silicone surface, then screw the skylight back down. After two years the skylight re-leaks...I was wondering is there a way to make a gasket for the skylight that would last longer than two years before leaking again?

  2. #2
    Join Date
    Sep 2012
    Location
    Boston
    Posts
    1,004

    Default Re: Leaking skylight every two years

    Grace Ice and Water Shield, it's sold at your local lumber yard and the big box stores

  3. #3
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,598

    Default Re: Leaking skylight every two years

    Depending on where it's leaking exactly, your problem could also be the skylight installation and flashing, the caulking type or the caulking application.
    A gasket (foam or rubber) won't solve anything, it will deteriorate quickly.

  4. #4
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,969

    Default Re: Leaking skylight every two years

    Try switching to a urethane caulk.

  5. #5
    Join Date
    Jan 2008
    Posts
    2,118

    Default Re: Leaking skylight every two years

    Another thing you could try is window-setting tape like is used on RV's. It's mean for sticking and sealing and it's made for outdoor weather on metal-to-metal surfaces. On RV's it lasts at least ten years, often a lot longer. I have become a fan of Duo-Seal "Siroflex" caulking. It's a silicone/urethane blend and it adheres like nothing else I've ever seen. Perhaps it will do the job for you but I haven't tried it on anything similar.

    Phil

  6. #6
    Join Date
    Jun 2013
    Posts
    3

    Default Re: Leaking skylight every two years

    Thank you for all your great ideas... I will give them all a try...
    First up will be'
    I will try the window-setting tape like is used on RV's. It is made for outdoor weather on metal-to-metal surfaces
    With a possible ten year pay off.... I will let you all know how it works...

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