Condensation appearing on window

How to Stop Condensation Forming on Windows?

8 February 2021

Condensation forming on windows is a common problem for many property owners, and we are often asked how do we stop condensation forming on windows? This is a common problem for homeowners during the winter when we often see water droplets on the window glass, pools of water on the windowsill, and even black mould forming around the window frame. While these issues (at the time) may seem that they are not harmful to your property, if they are not diagnosed earlier enough they can cause serious damp problems.

The most efficient methods of preventing condensation from forming are by managing the airflow in and out of the property, managing the temperature, and reducing the amount of humidity inside of the house.

In this article we hope to answer all your questions related to condensation on windows such as: what causes condensation on windows? Is it harmful to your health? Most importantly though, we will help you understand how to stop condensation forming on windows.

What Causes Window Condensation?

The main cause for condensation on windows is that warm, moisture-laden air deposits itself onto surfaces that are colder in temperature. When this air comes into contact with a cold surface such as windows it will then release the moisture onto the glass which will form water droplets.

If there is too much humidity in a room, or if the air circulation is poor within the property itself, then this is where internal condensation problems will start to occur. If the temperature in a room is cool this can also create cold surfaces just like windows where warm air can condense onto, creating similar condensation problems – just not on a window.

Water droplets on window

Condensation occurring on windows is mainly due to people carrying out daily activities this can be from showering, cooking, washing or drying clothes inside of the house. Another reason for condensation to occur is that the property has double glazing or insulation installed which does not allow for the stale air to escape.

As we have already mentioned, condensation tends to occur predominantly in the colder months of the year. This is largely down to the fact that there is more warm moisture-laden air in the property and the windows tend to be colder meaning moisture is deposited on them.

How to Stop Condensation Forming on Windows?

Now we have explained what causes condensation we can answer the question of how to stop condensation on windows. These are the small changes that can be made by yourself to condensation appearing on your windows:

  • Opening windows where possible (having windows open on both sides of the house can increase air circulation)
  • Trying to avoid drying clothes on radiators or areas where there are is no air circulation. If you must dry clothes indoors, then open all surrounding windows to allow the moisture-laden air to escape.
  • When cooking, turn on the extractor fans (if you have one). Also, you should try and remember to cover your pots and pans to reduce the amount of steam that is released.
  • When showering, use the extractor fan and even when you are finished, make sure it is left on for at least 10-15 minutes.
  • Dehumidifiers do not get rid of condensation, but they do help reduce moisture in the air so it could be a worthwhile investment depending on your circumstances.
  • Raising the temperature of the windows is a good solution for reducing condensation and this can be achieved by raising the temperature of the house slightly or by using your curtains or blinds. By raising the temperature of the windows you will reduce the chances of warm air hitting a cold surface e.g. a window.
  • This might sound unorthodox, but moving your plants from inside to outside of the house can help reduce condensation as well. Plants release moisture into the air, so by moving the plants away from the windowsill you can help achieve a reduction of condensation occurring.
  • If you have condensation in between the window panes then it might be worth replacing the glass units.
  • Checking for water leaks is also a good idea. While this is one of the main causes for damp to occur, it can also increase the chances of excess humidity. The leaks should be fixed at the source of the problem e.g. gutters and roof coverings.
  • You should try and seal around windows to ensure that the cracks and any openings do not allow for cold air to get inside the house.
  • While they are not common in most modern homes, using ceiling fans installed at your property can also help reduce condensation. Ceiling fans allow for good air circulation around the house. The advantage of using ceiling fans is that it not only do they reduce the moisture in the room, but they also spread warm air more evenly.

Using a Ventilation System

One of the best solutions to permanently controlling condensation on windows is by having a ventilation system installed within your property. Positive pressure units for example work by increasing fresh air throughout the property, which then leads to getting rid of the damp and stale air out of the property. By using this type of ventilation system, you can expect condensation levels to be heavily reduced.

Heat recovery systems also work well by reducing the amount of moisture in the air within the property and replacing it with fresh air from outside. The heat recovery unit will not only extract the damp moisture laden air in the room but also significantly improve the property’s energy efficiency by reducing the amount of heat that is wasted so it can also help reduce energy bills.

Need More Advice?

We hope this guide has provided you with useful advice on how to stop condensation forming on windows. If you are unsure that your condensation problem is a damp issue, then we have specialists across the UK who would be happy to carry out a survey and diagnose your issue. You can get in touch by contacting us online or by calling on 0800 288 8660.