Condensation on Double Glazed Windows: Why it Happens & How to Fix It
Have you ever noticed condensation on your double glazed windows and wondered why it’s happening or how to fix it? You’re not alone! Condensation on double glazed windows is a common issue, but understanding its causes and knowing how to tackle it can keep your home comfortable and your windows clear.
What Exactly is Condensation on Double Glazed Windows?
Condensation is moisture that forms tiny droplets on cool surfaces, such as your window panes. Think of a cold drink on a warm day, the outside of the glass collects moisture. This same process happens when warm, humid air inside your home meets the cooler surfaces of double glazed windows.
Types of Condensation on Double Glazed Windows
| Location | Cause | Recommended Action |
| Outside | Cool external temperatures | No action needed—normal and temporary |
| Inside | Excess indoor humidity | Increase ventilation or use a dehumidifier |
| Between Panes | Window seal failure | Replace the affected window pane |
Condensation Outside: Your Windows Are Working!
Condensation on the outside of your double glazed windows is actually a good sign, it means your windows are effectively insulating your home. Usually appearing during cool mornings, this type of condensation disappears naturally as temperatures rise.
Condensation Inside: Managing Humidity
Seeing condensation inside your windows indicates high indoor humidity, often common in kitchens, bathrooms, or newly renovated homes.
Here are simple steps to reduce indoor condensation:
- Regularly ventilate your rooms by opening windows or using exhaust vents.
- Operate extractor fans while cooking or showering.
- Use a dehumidifier to control indoor moisture levels.
- Avoid drying clothes indoors whenever possible.
Condensation Between Window Panes: Take Action
Condensation trapped between the glass window panes of your double glazed windows signals a problem, typically, this means a seal has failed.
Recommended steps:
- Replace the damaged window pane to restore window efficiency.
- Check your warranty coverage, many manufacturers offer repairs or replacements for seal failures.
✅ Temporary Condensation on New Double Glazed Windows
If you’ve recently installed new double glazed windows, you might initially notice more condensation. This is because your home is adjusting to improved airtightness and insulation. This type of condensation usually resolves within a few weeks with regular ventilation.
Preventing Condensation-Related Issues
Persistent indoor condensation can lead to mould growth, potentially affecting your home’s air quality.
To prevent this:
- Regularly ventilate your living spaces.
- Maintain consistent indoor heating.
- Quickly address any visible mould by cleaning affected surfaces.
💡 When to Seek Professional Help
Occasional condensation on double glazed windows isn’t typically concerning. However, persistent moisture and mould may indicate underlying humidity or insulation issues. If condensation keeps recurring, consulting a professional to inspect your windows and ventilation systems can provide peace of mind.
➡️ Need Expert Advice?
Still have questions about condensation on your double glazed windows? We can help identify specific issues and recommend the right solutions tailored to your home.
Understanding condensation is your first step toward clearer windows and a more comfortable home.