Next morning, the tape came off. The crack was barely visible… but a new fog had bloomed between the panes, right where the epoxy had heated during curing. The broken seal let moisture in.
Double-pane windows (also known as Insulated Glass Units or IGUs) work by trapping a layer of gas (usually argon or air) between two sheets of glass. This acts as an insulator. To keep moisture out, the manufacturer uses a sealant around the edges.
For three hours, I felt like a genius.
CRACK. A white spiderweb splintered across the inner pane of our living room’s double-pane window.
This is the telltale sign of a .
Before you call a contractor for a costly full-window replacement, there are a few ways to tackle this problem. Depending on the severity of the damage and your budget, you can choose between a DIY cleanup, a professional repair, or a partial replacement.
I typed the search with trembling thumbs. The first video said, “If the seal is broken and there’s fog or a crack between the panes, you can’t just patch it.” My crack wasn’t between the panes—it was on the inside surface. That meant I could access it without removing the whole IGU (insulated glass unit). Hope flickered. how to fix a double pane window
Over time, usually due to age, temperature fluctuations, or house settling, that seal fails. Once the seal breaks, outside air enters the space, bringing moisture with it. When the sun hits the window, that moisture evaporates and condenses on the glass, causing the fog.