Double Paned Window Repair Online

| Repair Type | Average Cost per Window | Energy Savings Restored? | | --- | --- | --- | | Defogging | $60 – $100 | No | | IGU Replacement (glass only) | $200 – $400 | Yes | | Full window replacement | $600 – $1,200+ | Yes |

Let’s pull back the curtain on double paned window repair—what works, what doesn’t, and how to know when to fix versus replace. A double paned window isn't just two pieces of glass. It is a sealed system. The two panes are separated by a spacer (usually metal or foam) and filled with an insulating gas—typically argon or krypton. The air gap stops thermal transfer (heat moving from one side to the other). double paned window repair

A temporary cosmetic fix. Defogging removes the cloudiness, but it does not restore the inert gas . You’ll still have poor insulation. Worse, the seal is still broken, so fog usually returns within 1–3 years. We do not recommend this for energy savings. Option 2: Seal Replacement (Partial repair) In rare cases, if the frame is perfect and only the sealant failed, a glazier can remove the glass unit, clean the spacer, and apply new sealant. | Repair Type | Average Cost per Window

If your home has double paned windows (also known as insulated glass units or IGUs), you probably installed them for two reasons: energy savings and comfort. But what happens when those high-tech windows suddenly look like a dirty aquarium? It is a sealed system

If you have 10 foggy windows, IGU replacement at $300 each = $3,000. Full replacement could be $8,000+. You can see why glass replacement is appealing. Do not try to separate the glass panes yourself. A broken seal exposes the sharp edges of the spacer and glass. Moreover, if your window was made before 2000, the spacer may contain desiccant (silica gel) that is caustic. And if the unit ever had a lead-based coating? You’ll create a toxic dust.

You’ve likely heard two conflicting pieces of advice: "Just repair the seal" or "You have to replace the whole window." So, which is it?