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.

10 COMMENTS

    • Hi, Barb,

      TodaysHomeowner.com 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!

  1. I RECENTLY REPLACED MY 2 PLY WINDOWS WITH NEW 2 PLY WINDOWS. HOWEVER, WHEN THE TEMPS WENT TO 10 DEGREES IN PHILA AREA I NOTICED THE GLASS IN THE ROOM WAS SWEATING- NOT IN BETWEEN THE GLASS BUT ON THE INSIDE OF THE HOUSE SEGMENT.
    WHAT TYPICALLY WOULD CAUSE THIS- INSTALLATION?

  2. I had 2 broken double sided windows and the cost for new ones was in the 4 digits! So l bought the glass at the glass store… just normal window glass and bought argon gas for $27 ..the new glass was $95 …removed the old broken pieces …and replace the new glass with silicone except the corners then with a tiny hose attached to the regulator pumped argon gas in the middle of the glasses and at the end sealed the corners…. ….my windows never fogged …and the cost was less than $150…. …it took me literally about 30 min per window… ….i’m thinking to open a window repair shop lol lol hope this help yall

  3. I have window in family room with. A metal design in the glass and have a fogged and some water in San ode a have to fill the gas please call me size of the window is approx. 43 by 48

    • Hi, Mike! Thanks for writing to us. Looks like there are some AutoCorrect issues so it’s a little hard to follow along. Please re-send the question. 🙂

  4. Good Afternoon: I would like to locate a company here in greensboro, NC that can make and repalce a fogged Insulated window glass because there is a leak and the metal is deterating.. can you assist me concerning my issue?
    Thanks for your suggestion.

    • Hi, Marshall,
      We don’t offer information on home builders, repairers and suppliers, as this varies by location, but we encourage checking your local phone listings for this information.
      Good luck!

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