How to Stop Condensation on Windows (Practical Tips That Work)

Condensation builds when warm moist air hits a cold surface. Reduce moisture and improve airflow and you’ll see fast results.

Quick Fixes

  • Open trickle vents or crack the window for 5–10 minutes.
  • Run a small dehumidifier on a humidity target (e.g., 50%).
  • Use extractor fans during showers and cooking.
  • Dry clothes in a single room with the door closed + dehumidifier.

Night Routine For Bedrooms

  • Run dehumidifier on low before sleep.
  • Keep doors slightly open for airflow if possible.
  • Wipe heavy condensation in the morning to prevent mould.

Longer-Term Improvements

  • Draught seals, thermal curtains, window film.
  • Check for hidden damp sources (leaks, blocked vents).

FAQs

What is a healthy indoor humidity? Around 40–60%.
Do moisture absorbers help? They work for very small spaces; a dehumidifier is stronger for rooms.


Looking for product picks? Read our Best Small Dehumidifiers for Bedrooms (UK).

Last Updated on 30 November 2025 by YEG