Condensation on windows: What causes it and how to stop it

Living in the UK, a lot of us had to face an all-too-familiar sight on our windows – condensation. As a seasoned window installer, we, at World of Windows, understand the frustration that condensation can bring to homeowners. Fear not, for we have seen and resolved this issue countless times! Shed light on the reasons behind window condensation and get valuable tips to help you keep your windows clear and your home comfortable during any weather.

condensation on windows

What causes condensation on windows

Condensation is caused by the rapid cooling of the warm, moist air when it touches the colder windowpane, causing the water vapour in the air to turn into water droplets on the window surface. While it is a natural process, excessive condensation can lead to unwanted consequences such as mould growth, rotting window frames, and even potential structural damage.
Several factors contribute to the prevalence of condensation on windows:

Temperature Difference

The outdoor air is cooler than the indoor air during colder months, creating a stark temperature difference between your cosy home and the chilly window glass. 

Indoor Humidity Levels

High indoor humidity levels make it easier for moisture to condense on the colder glass surface.

Ventilation

Poor ventilation traps humid air indoors, exacerbating the condensation problem.

Window Type

Single-pane windows are more susceptible to condensation than double-pane, insulated windows that maintain a more consistent surface temperature.

how to stop condensation on windows

How to stop condensation on windows

To prevent excessive condensation, it is essential to control indoor humidity levels and ensure proper ventilation throughout the house.

Use a Dehumidifier

Ideally, the humidity in the house should be between 30% to 50%. Investing in a good-quality dehumidifier can work wonders in reducing indoor humidity levels, thereby minimising condensation on your windows. It’s an effective long-term solution to keep your home comfortable.

Improve Ventilation

Proper airflow is crucial to prevent excess moisture buildup. Open windows when possible, especially in areas prone to humidity, like the kitchen and bathroom. Installing exhaust fans in these rooms can also aid in humidity control.

Check and Repair Seals

Faulty window seals can let outdoor air in, which contributes to increased condensation. Regularly inspect your window seals and promptly address any issues.

Window Treatments

Utilise window coverings like curtains or blinds to create a barrier between the warm indoor air and the cold window surface. This can help reduce condensation to some extent.

Maintain Indoor Temperature

Keeping a consistent indoor temperature can reduce the temperature contrast between the window glass and the surrounding air, minimizing condensation.

Upgrade your windows

While all windows can experience some level of condensation, certain types may have specific characteristics that affect condensation differently. Get in touch with an expert local window installer to discuss your specific requirements.

Upgrade Your Windows

with World of Windows

Get in touch with our team for advice and a free quote!

Types of windows to help prevent condensation

Double Glazed Windows

Double-glazed windows consist of two glass panes separated by a space filled with air or insulating gas. This design provides better insulation than single-pane windows and can help reduce condensation compared to traditional single-pane windows.
double glazing windows
Tilt & Turn Window

Tilt and Turn Windows

Tilt and turn windows have a unique design that allows them to open in two ways: tilting inwards from the top for ventilation or opening fully from the side like a traditional casement window. The tilt function provides controlled ventilation without fully opening the window, which can help manage humidity and condensation.

Tilt and Turn Windows

Tilt and turn windows have a unique design that allows them to open in two ways: tilting inwards from the top for ventilation or opening fully from the side like a traditional casement window. The tilt function provides controlled ventilation without fully opening the window, which can help manage humidity and condensation.
Tilt & Turn Window

Casement Windows

Casement windows are hinged on one side and open outward like a door. When fully open, they provide excellent ventilation and allow for better air circulation, which can help reduce indoor humidity levels and minimize condensation.
casement windows

As a window installer with years of experience, we can assure you that condensation is a common issue, but it is not insurmountable. By understanding the reasons behind condensation and implementing these practical tips, you can combat window condensation effectively. Remember, well-maintained windows not only keep your home beautiful but also ensure a comfortable living space for you and your loved ones throughout the year.

If you ever face persistent condensation problems or need professional assistance, don’t hesitate to reach out to a trusted window installation expert in your area. 

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