Why Do I Get Condensation On My Windows?

Window condensation can be a real frustration for homeowners. It can cause an array of problems, from mould growth on windows to damp patches on walls. But condensation can be easily minimised with a few quick remedies.

Condensation on windows can be down to a variety of causes. Here are the most common causes and how you can deal with them.

Lack of adequate ventilation

You may be experiencing condensation because of bad ventilation; warm air is trapped in your home and comes into contact with cold surfaces which produces water.

Common causes

• Not turning the extractor fan on while cooking.
• Keeping windows shut or not turning on the fan while you shower.
• Not having a clear airflow through your home, for example blocking up chimneys.

Quick remedy

  •  Turn the extractor fan on and open windows while cooking.
  • Open windows and turn on extractor fan while showering.
  • Install air vents in rooms at most risk, these will naturally ventilate air out of the house.
  • Install new, modern windows, designed to insulate and to minimise condensation.

Time of the year

Condensation is more likely to occur in the winter months. Home owners tend to heat up their homes more during the cold months, thus the humidity is higher and creates more water on cold surfaces.

Quick remedy

• Opening windows to decrease humidity. A negative of this is that you then have to re-heat your house when cold air comes in.
• Don’t dry clothes in-doors; try to dry them outside or in a tumble dryer.
• Buy a dehumidifier, this will enable you to dry clothes in-doors and control humidity levels.

House pets and plants

Aquariums or fish tanks can produce moisture in the surrounding areas. Also, be aware if any damp patches form near plants, this can be an indicator of producing moisture.

Quick remedy

• Cover up aquariums or fish tanks with the appropriate lids that will contain the warm air. In addition, move tanks away from windows; leave space for air to ventilate around it.
• Move plants outside or off windowsills.

Faulty or old windows

If you notice that the condensation is in between the two glass panes of double glazing then the above remedies are unlikely to work. It is a sign that the glass sealed unit needs to be replaced and maybe even the windows themselves.


• Replace the sealed units into the existing windows if the windows are still serviceable.
• If the existing frames have seen better days it may be unwise to fit new modern units into them, thus the answer is to replace the windows which could well be more cost effective – Check out our windows and services, we’re more than happy to help.


All these causes of condensation are very easy to solve. These affordable and quick solutions will hopefully resolve your condensation problems. Here at South Coast we pride ourselves on high quality windows and exceptional installations. Solving your problems is at the top of our agenda.

Did you find this article helpful? Comment below what your number one remedy is.

Leave a Reply

Your email address will not be published. Required fields are marked *