How-To Videos

Replacing Fogged Insulated Window Glass

By: Danny Lipford
Man in blue shirt removing fogged glass from window frame.

Replacing the fogged glass in a double-pane window.

The seal between the panes of glass on insulated windows can leak over time, allowing moisture to accumulate between the glass.

To replace a fogged glass window pane:

  1. Measure the size of the glass and order a replacement.
  2. Take the muntins off the inside of the window.
  3. Remove the trim strips around the outside of the window that hold the glass in place.
  4. Take out the old window pane.
  5. Remove any caulk around the window frame opening.
  6. Run a bead of new sealant around the window frame.
  7. Install the new glass in the opening.
  8. Replace the trim strips and muntins.

Watch this video to find out more.

Further Information

Video Transcript

Danny Lipford: Fogged windows occur when the seal between the panes of glass fail in an insulated glass window. To replace it a professional measures the window so a replacement panel can be manufactured to the exact same size.

At installation the removable muntins, or decorative panels, are taken out, and the trim around the outside of the window is carefully removed. For wood windows this is usually a thin wood strip, on aluminum units it’s often a rubber seal.

With the trim gone, they can remove the insulated glass panel, clean the opening, and replace it with the new one, using sealant around all edges to prevent any leaks.


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3 Comments on “Replacing Fogged Insulated Window Glass”

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  • Official Comment:

    Thomas Boni Says:
    August 21st, 2018 at 5:36 pm

    Hi, Barb, features home improvement advice from the nationally syndicated TV show “Today’s Homeowner” and its experts.
    We don’t offer information on individual home builders and suppliers, but we encourage checking your local phone listings for this information.

    Thanks for your question, and good luck!

  • BArb Says:
    August 20th, 2018 at 10:23 am

    Where would we purchase the replacement double pain glass for a window that is fogged!!!

  • Robert Hobbs Says:
    November 19th, 2017 at 12:39 pm

    Do you know where I find insulated glass panel for replacement? Thanks RAH

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Replacing Fogged Insulated Window Glass