Condensation forms when moisture in the air meets a surface cold enough for water vapor to turn into droplets.
Occasional condensation does not necessarily mean the window is defective, but persistent moisture can cause problems.
1. Determine Which Surface Is Wet
Check whether the moisture is:
- On the inside surface
- On the outside surface
- Between panes of glass
These situations can have different causes.
2. Indoor Condensation May Indicate High Humidity
Cooking, showering, drying clothes, and everyday activities add moisture to indoor air.
When humid indoor air contacts cold glass, condensation can develop.
Using bathroom and kitchen ventilation appropriately can help control moisture.
3. Improve Air Circulation
Curtains, blinds, and furniture can sometimes reduce airflow around windows.
Allowing air to circulate near the glass may help reduce persistent moisture.
4. Wipe Up Excess Water
Do not allow large amounts of condensation to sit repeatedly on window frames or surrounding materials.
Persistent moisture can contribute to staining, damaged finishes, mold growth, or deterioration.
5. Moisture Between Panes Is Different
If condensation appears trapped between panes of insulated glass, the window’s sealed glass unit may have failed.
Surface cleaning will not remove moisture trapped inside the sealed unit.
When Should You Call a Professional?
Consider professional assessment if:
- Moisture is trapped between panes
- Condensation is severe or persistent
- Window frames are deteriorating
- Mold repeatedly develops
- Water damage appears around the window
- You suspect another source of moisture
Controlling indoor humidity can solve many condensation problems, while moisture trapped between panes usually points to a window-specific issue.