Foggy Window? Cracked Seal? A Homeowner’s Guide to Double Pane Glass Window Repair

Contrary to popular belief, you generally simply "reseal" a foggy window. Once the desiccant (moisture-absorbing material inside the spacer) is saturated and the seal fails, the unit is compromised.

Double pane windows (also known as insulated glass units or IGUs) are a staple of modern energy-efficient homes. They consist of two panes of glass separated by a spacer and a layer of gas (usually argon or krypton) or dry air.

Here are your three real-world options:

But when they fail, they don’t fail like a single sheet of glass. If you see fog, condensation between the panes, or a hazy film, Here’s what you need to know about repairing them.