This is the "heavy duty" repair. You keep your existing window frame (vinyl, wood, or aluminum) but a professional removes the entire glass unit (the sash) and installs a brand new Insulated Glass Unit (IGU) into the existing frame.
Here is a detailed breakdown of the repair options, costs, and effectiveness. can a double pane window be repaired
Often repairable. A technician can drill small holes, clean the interior, apply a defogger, and install a new seal. However, this is a temporary fix (5–10 years). The better long-term repair is replacing the insulated glass unit (IGU). This is the "heavy duty" repair
Repairing a double-pane window is often 50–70% cheaper than a full window replacement because you can keep the existing frame and only swap out the glass. Common Issues and Repair Options Often repairable
If you just want to see out of your window again, repair (defogging) works. If you want the window to keep your house warm again, repair (glass replacement) is the answer. If the whole system is failing, replace.