This is the standard industry repair. You do not replace the whole window frame—only the glass unit.
Glass Unit Replacement (The Standard Repair)Most professionals recommend replacing the IGU rather than the entire window frame. In this scenario, a technician measures the existing glass, orders a new factory-sealed unit, and swaps it into your current frame. This is significantly cheaper than a full window replacement and restores the window to its original energy efficiency. The Repair Process: Step-by-Step double pane windows repair
A pro can usually replace an IGU in 30–60 minutes per window. This is the standard industry repair