Look for plastic strips holding the glass in place. Pry these out carefully with a putty knife. Label which side is up.
This is a temporary fix (lasting 1–5 years), but it costs about $20 vs. $300 for a full replacement. repair double pane windows
Scrape out old butyl tape or silicone. The frame must be spotless. Look for plastic strips holding the glass in place
You’ve seen it before: that ugly white fog sitting between the two panes of glass in your living room window. You wipe the inside, you wipe the outside, but the haze won't go away. This is a temporary fix (lasting 1–5 years),
You need three numbers: Width, Height, and Thickness (to the 1/16th of an inch). Order a replacement insulated glass unit (IGU) from a local glass shop. Bring them the old unit if possible.
Most double hung windows have side tabs. Push them in and tilt the sash out. Lay it on a workbench.
Don’t Replace Them Yet! How to Repair Double Pane Windows (And Save $$$)