Are Your Windows Collecting Condensation?

It’s that time of the year again and winter is here! Zambia has humid seasons and during winter many homes experience window condensation which does more than obscure one’s view. It is wise to take steps to avoid it.

What exactly is condensation?

Condensation generally occurs in the atmosphere when warm air rises, cools and loses its capacity to hold water vapour. As a result, excess water vapour condenses to form cloud droplets.

Excess moisture in the home’s air is the main cause of condensation though humid weather can be one possible cause. If it is caused by the weather, the effect usually only lasts for a few weeks in the early part of the hot season. During the cold season, the cause of condensation is often the drastic temperature change that occurs when cold outdoor air hits the warm windows.

Although double-paned windows are less likely to form condensation than single-paned ones, your windows aren’t necessarily to blame for the condensation; they just happen to be the right type of surface for moisture to collect on. Sometimes the source of moisture on windows may be the result of new wooden window frames, which will initially give off moisture. But this problem should not last beyond the first hot season with a good air conditioning system.

What condensation can cause

Condensation on windows can lead to mold growth, as well as the rotting of wooden window frames. Mold may cause health problems such as hay fever, asthma, skin rash and eye irritation. Rotted window frames will need costly replacement to keep the building dry and secure.

Steps to avoid condensation on windows

To get rid of persistent condensation on home windows, you’ll need to address the root cause of the problem. This may be helped by:

• Reducing indoor humidity caused by kitchen and bathroom exhaust fans
• Checking that the attic has a balanced ventilation system such as a ridge and soffit* system, since poor airflow in the attic may contribute to high indoor humidity
• Upgrading to double-paned windows or adding storm windows in cold seasons, if the condensation is minor
• Hanging heavy drapes and keeping them closed on chilly winter days

If these steps don’t help, consult a professional about adding more exhaust fans or a whole-house ventilation system. A well-designed ventilation system improves overall air quality in addition to controlling humidity. In cases of extreme or high humidity, you may need a dehumidifier.

For further guidance on reducing condensation on home windows and keeping your indoor air quality high, contact NEL Air Conditioning wherever you are in Zambia.

Editor’s Note: Content supplied by NEL Air Conditioning

*soffits are roof eaves