How to Fix Condensation on Windows

Overview

Condensation on windows can indicate poor ventilation. This guide covers reducing and preventing window condensation.

Step-by-Step Fix

1. Regularly open your windows for at least 15-20 minutes a day, even in colder weather, to allow moist air to escape and fresh, drier air to circulate. Focus on rooms where condensation is most prevalent, such as kitchens and bathrooms after use, to significantly reduce indoor humidity.
2. Consider using a dehumidifier in affected rooms to actively remove excess moisture from the air, especially during colder months or when drying laundry indoors. Ensure the dehumidifier's water tank is emptied regularly, and check its effectiveness by observing a reduction in window condensation.
3. Carefully inspect the seals around your window frames from both inside and outside for any visible cracks, gaps, or degradation. Pay close attention to the mastic or silicone sealant, as these breaches allow cold air in and warm, moist air to condense, and plan to re-seal any compromised areas.
4. If your windows lack them, consider having trickle vents professionally installed at the top of your window frames to provide continuous, controlled background ventilation. Ensure the vents are always open to allow a constant, subtle flow of air that helps to dissipate indoor moisture without causing significant heat loss.
5. As soon as you notice condensation forming, wipe down your windows thoroughly with a clean, dry cloth or a window vacuum to remove the surface moisture. This prevents the water from being reabsorbed into the air or causing mould growth on sills and frames.

Common Symptoms & Diagnostic Resolutions

Review the common error codes and operating symptoms below to quickly identify the root cause of the fault before ordering replacement parts.

Frequently Asked Questions