Waking up to foggy, dripping windows is one of the most common complaints in UK homes, particularly through autumn and winter. The good news is that condensation is almost always fixable with a few simple changes to ventilation and daily habits, without any building work.
How Do You Get Rid of Condensation on Windows?
To get rid of condensation on windows, improve ventilation by opening windows for 10 to 15 minutes daily, use extractor fans when cooking or showering, keep bathroom and kitchen doors closed while in use, and avoid drying laundry on radiators. These changes address the root cause, excess moisture in the air, rather than just wiping it away temporarily.
What Causes Condensation on Windows?
Condensation forms when warm, moist air meets a cold surface, such as glass, and the moisture in the air cools and turns into liquid droplets. Everyday activities such as cooking, showering, and drying clothes indoors all add moisture to the air, and UK homes often have high enough relative humidity year-round to encourage both condensation and, if left unchecked, mould growth.
Quick Fixes for Right Now
- Wipe it down: a cloth or squeegee removes existing condensation and stops it running onto sills and frames.
- Open a window briefly: even five to ten minutes of airflow helps exchange damp indoor air for drier outdoor air.
- Use a hairdryer on a low setting: this clears condensation quickly but is only a temporary fix, not a solution to the underlying cause.
Longer-Term Fixes
1. Improve Ventilation
Open windows for 10 to 15 minutes daily, ideally in the morning and evening, to exchange the air in a room. If your windows have trickle vents, keep them open to allow a constant, low level of airflow without needing to open the window fully.
2. Use Extractor Fans Properly
Run extractor fans in the kitchen while cooking and in the bathroom while showering or bathing, and keep the door closed during and for a while after, so moist air is pulled outside rather than spreading through the house.
3. Change How You Cook and Bathe
Keep lids on saucepans while cooking to reduce steam, and turn the heat down once water has boiled. When running a bath, add cold water before hot, which can reduce steam by as much as 90%.
4. Dry Laundry Carefully
Avoid drying washing on radiators, since this releases significant moisture directly into the room’s air. Dry clothes outside where possible, or in a bathroom with the door closed and an extractor fan running or window open.
5. Keep a Consistent Background Heat
Keeping your heating on low throughout the day during cold weather, rather than letting rooms swing between cold and warm, helps keep wall and window surfaces closer to room temperature, which reduces the temperature gap that causes condensation.
6. Leave Space Around Furniture
Leaving a small gap between furniture and cold external walls allows air to circulate properly, rather than trapping cold, damp pockets behind large pieces such as wardrobes and sofas.
7. Consider a Dehumidifier
For persistent condensation, particularly in a room where you cannot ventilate easily, a dehumidifier extracts excess moisture from the air directly. This treats a symptom rather than the underlying cause, so it works best alongside, not instead of, the ventilation changes above.
Condensation Between Double-Glazed Panes
If you notice condensation trapped between the two panes of a double-glazed window, rather than on the inside surface, this points to a failed seal rather than a humidity problem. Once the seal between the panes breaks, moisture gets trapped inside the unit, and the only real fix is replacing the sealed glass unit, since no amount of ventilation will clear condensation trapped between the panes.
If window seals or frames are ageing more broadly, our uPVC vs composite door comparison covers similar material choices that also apply to window frames.
When Condensation Points to a Bigger Problem
Persistent condensation that does not improve with better ventilation can sometimes point to penetrating or rising damp entering from outside, rather than moisture generated inside the home. If you notice damp patches, a musty smell, or black mould developing despite following the steps above, it is worth having the property inspected, since treating condensation alone will not resolve an underlying damp issue.
Frequently Asked Questions
Why does condensation only appear on some windows?
Windows in colder rooms, north-facing rooms, or older single-glazed units are more prone to condensation, since the glass surface stays colder relative to the warm, moist indoor air.
Does double glazing stop condensation completely?
No. Double glazing reduces condensation by keeping the inner glass surface warmer, but it cannot eliminate it entirely on its own. Ventilation and reducing indoor humidity are still needed for the best results.
Is condensation on windows a sign of damp?
Not necessarily on its own, but persistent, heavy condensation that leads to mould or damp patches on nearby walls can indicate a wider humidity or ventilation problem worth investigating further.
How do I stop condensation on my bedroom windows overnight?
Keeping the bedroom door slightly open for airflow, using a trickle vent if fitted, and avoiding drying clothes in the room overnight all help reduce the moisture available to condense while you sleep.
Can I fix condensation trapped between double-glazed panes myself?
No. This indicates a failed seal within the sealed glass unit, and the only effective fix is professional replacement of that glass unit.
If condensation persists despite following these steps, or you notice mould or damp patches developing, consult a qualified surveyor to rule out an underlying damp issue.
About the Author
Spire Homes Editorial Team researches and writes practical, UK focused home improvement guides covering renovation planning, financing, interior design, and property maintenance. Our content is reviewed for accuracy and updated as guidance changes.
