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Repair Broken Double Pane Window| Option | DIY Cost | Pro Cost | |--------|----------|----------| | Replace just the IGU | $100–$300 | $300–$600 | | Replace entire window | $300–$800 | $600–$1,500+ | Necessary if the frame itself is rotted or structurally damaged. DIY Step-by-Step Guide for IGU Replacement repair broken double pane window Repairing a broken double-pane window typically requires replacing the entire Insulated Glass Unit (IGU) rather than just a single pane of glass. Because these windows are vacuum-sealed and often filled with insulating gases like argon, a crack or seal failure compromises the unit's thermal efficiency. The Mechanics of Double-Pane Windows Double-pane windows, or IGUs, consist of two glass sheets separated by a spacer and sealed together as a single unit. The space between is often filled with | Option | DIY Cost | Pro Cost |
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