How to Tell If Your Window Seal Is Broken

Modern windows have two or three layers of glass with a sealed gap between them for insulation. Toronto temperature swings cause the glass and frame to expand and contract, which slowly wears out the seal. Once the seal fails, outside air gets in and moisture settles between the panes. This creates a hazy look that cleaning will not fix.

If you can wipe moisture away from the inside or outside surface, it is normal condensation. If the fog stays after cleaning both surfaces, the seal is broken. Other signs include white mineral deposits between panes, recurring droplets, and slight visual distortion through the glass.

Many companies suggest replacing the entire window, but that is often unnecessary when the frame is still solid. Replacing a healthy frame is slower, more disruptive, and can damage existing trim or siding.

OhMyGlass Window and Door Repairs replaces only the failed glass unit while keeping your existing frame, trim, and hardware. Most repairs are completed quickly with minimal disruption. A new sealed unit restores clarity and insulation.

We only recommend full replacement when the frame itself is damaged, such as rotted wood or severe warping that prevents proper operation. If the frame is sound, a glass-unit replacement is usually the best option.