How to Fix Condensation on Windows


Condensation on newly installed windows is a common issue that homeowners may encounter. While it might be disconcerting to see moisture forming on your brand-new windows, understanding the reasons behind it and implementing effective solutions can help mitigate the problem. In this post, we’ll explore why condensation occurs on new windows and provide practical tips to address and prevent it.

Causes of Condensation on New Windows:

  1. Less Drafty Windows: Newly replaced windows often are less drafty when compared to old ones. This means that moisture is now not able to escape your home as freely as before.
  2. Science: When the indoor and outdoor temperatures vary significantly, the glass surface of the window can become cold. If the indoor air is warm and carries moisture, condensation occurs as the warm air comes into contact with the colder window surface.
  3. Humidity Levels: High indoor humidity levels contribute significantly to condensation. Activities such as cooking, showering, and even breathing release moisture into the air. If this moist air comes into contact with the cool window surface, it can condense into water droplets.
  4. Insufficient Ventilation: Inadequate ventilation exacerbates condensation issues. Without proper air circulation, moisture-laden air becomes trapped indoors, increasing the likelihood of condensation on windows.

How to Fix Condensation on New Windows:

  1. Monitor and Control Indoor Humidity: Keep indoor humidity levels in check by using dehumidifiers, exhaust fans, and properly ventilating your home. Aim for a relative humidity level between 30-50% to reduce the likelihood of condensation.
  2. Use Exhaust Fans: Install exhaust fans in high-moisture areas like kitchens and bathrooms. These fans help expel moist air outside, reducing the chances of condensation.
  3. Promote Air Circulation: Allow air to circulate freely within your home and prevent moisture from settling on surfaces. Use the furnace heater frequently or use the Fan setting on your furnace to promote constant air circulation. If possible, use cheap box fans pointed at the problem windows to promote air circulation. Keep doors open between rooms to facilitate airflow. Consider using ceiling fans to improve circulation, especially in rooms prone to condensation.
  4. Open Blinds/Curtains : Open up blinds and curtains to promote air circulation getting to the windows.
  5. Ventilate Your Home: Regularly open windows, even in colder months, to let fresh air in and expel indoor moisture. This helps balance indoor and outdoor temperatures and reduces the likelihood of condensation.