Replacing Fogged Insulated Window Glass
By: Danny Lipford
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:
- Measure the size of the glass and order a replacement.
- Take the muntins off the inside of the window.
- Remove the trim strips around the outside of the window that hold the glass in place.
- Take out the old window pane.
- Remove any caulk around the window frame opening.
- Run a bead of new sealant around the window frame.
- Install the new glass in the opening.
- Replace the trim strips and muntins.
Watch this video to find out more.
- How to Replace Double-Pane Glass Windows (video)
- Choosing the Right Windows
- How to Select Insulated Windows
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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