Cloudy Windows: Condensation, Dirty Glass or a Sealed-Unit Problem?
Quick answer: Cloudiness on an exposed glass surface may be dirt or condensation. Haze or moisture trapped between sealed panes usually needs assessment by a window professional. Window cleaning can remove accessible surface soil; it cannot reach inside an intact sealed unit.
Start by locating the haze
View the window from inside and outside where safely accessible. Does the haze wipe away from one exposed surface? Does it change through the day? Is it fixed between the panes even after both surfaces are clean? These observations help describe the issue without dismantling the window.
Three common situations
Room-side droplets: condensation on the interior glass can be linked to indoor moisture and cold surface temperatures.
Outside streaks or spots: airborne soil, runoff or mineral deposits may be visible on the exterior face.
Between-pane fogging: a sealed-unit issue should be assessed separately from surface cleaning.
A single window can have more than one issue. A dusty exterior does not rule out internal fogging, and condensation alone does not establish that a window has failed.
What cleaning can and cannot change
Cleaning is useful when fingerprints, dust or other accessible residue obscure the view. It will not repair a seal, remove scratches or correct a moisture problem inside the glazing assembly. If a cleaner flags a possible unit issue, keep that finding separate from the cleaning scope and ask a qualified window service to assess it.
Send a description that helps
Which room and which pane are affected?
Is the cloudiness constant or weather-dependent?
Can you wipe it from an accessible surface?
Have both inside and outside faces already been cleaned?
Take photographs from more than one angle, without direct glare. Include an overview of the window style and access. Never lean out or remove glazing to investigate.
Frequently asked questions
Does condensation always mean a failed window?
No. Surface condensation and moisture between sealed panes are different observations. The location of the moisture matters.
Should I replace a cloudy window before cleaning it?
First establish whether the haze is accessible dirt, condensation or a glazing problem. Replacement decisions belong with a window specialist.
Can you quote a clean from photos?
Photos help identify the cleaning scope and access. They cannot conclusively diagnose every seal or coating issue.
Plan the right cleaning scope
Explore Edmonton window cleaning services or send photos through our window cleaning quote form. Describe persistent haze so we can distinguish cleaning from repair work.
Related reading
Reference
Andersen’s window care information distinguishes condensation from glass failure and provides product-specific cleaning guidance.
Published by Priority One Maintenance, serving Edmonton and surrounding communities. Illustration generated with AI; it depicts the topic and is not a photograph of a completed customer job.
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