Fog, haze, or moisture between the panes means the thermal seal has failed. Once that seal goes, humid air gets between the glass and no amount of cleaning will help, because the moisture is trapped inside the unit. The fix is straightforward: we replace the sealed glass unit itself, and your window frame, sash, and hardware all stay right where they are.
This is our single most requested service, and for good reason. North Bay’s freeze-thaw swings are exactly what wears out window seals, so foggy units show up here earlier than they do in gentler climates. Replacing just the sealed unit restores the clear view and the insulating layer for far less than new windows.
A failed seal is also an energy problem, not just a cosmetic one. The insulating gas between the panes is gone, so the window loses heat faster. If you are noticing drafts or cold glass along with the fog, our broader thermal window repair service looks at the whole window’s performance, and plain glass replacement covers cracked or broken panes.
If several windows have fogged up at once, which is common when a house’s windows all date from the same build, ask about a full window service visit so everything gets handled in one trip.
What's included
- Assessment of each sealed unit to confirm seal failure
- Exact measurement of the existing unit and airspace
- A new sealed unit fitted into your existing sash
- New perimeter seals for a moisture-tight fit
- Energy-efficient glass options when you want an upgrade
- Cleanup and disposal of the old unit
When to call us
- Fog or haze between panes that will not wipe off either side
- Condensation droplets or pooled moisture inside the glass
- A milky white film that comes and goes with the weather
- Colder glass and higher heating bills than the window used to give you