How to Get Rid of Condensation Inside Double Glazing Windows

What is Condensation?

Condensation is the process by which water in the air transforms into liquid water when it comes into contact with a colder surface. This occurs when warm, moist air cools down, and its capacity to hold moisture decreases, leading to the formation of water droplets.

Air naturally contains water vapor, especially in areas with high humidity or during activities that release moisture into the air, such as cooking or bathing. When warm, moist air comes into contact with a colder surface or encounters cooler air, it cools down. As the air cools, its ability to hold moisture decreases.

Saturation Point

The point at which air is holding as much moisture as it can is known as the saturation point. When the air reaches this point, any additional moisture must be released in the form of water droplets. Condensation is then caused with the release of moisture results in the formation of tiny water droplets on the cooler surface, which can be seen as dew, frost, or water droplets on windows, for example.

Common examples of condensation include dew forming on grass in the early morning, fog on a cool day, or water droplets forming on the outside of a cold beverage glass. In the context of windows, condensation can occur when warm indoor air comes into contact with the colder surface of the glass. This is why you might notice condensation on windows during colder weather or in areas with temperature differences between the inside and outside of a building.

How to Get Rid of Condensation

Condensation inside double glazing is typically a sign that there is excess moisture in the air between the window panes. Here are some steps you can take to reduce or eliminate condensation:

Identify the Source of Moisture

Ensure that the condensation is indeed on the inside of the double glazing and not between the panes. If it’s between the panes, it may indicate a seal failure, and you might need professional help to replace the window.


Improve ventilation in the affected area. Proper ventilation helps to reduce moisture levels. Ensure that rooms are well-ventilated, especially in areas prone to high humidity, such as kitchens and bathrooms.

Use Dehumidifiers

Consider using a dehumidifier to remove excess moisture from the air. This can be particularly helpful in areas where ventilation is limited.

Limit Indoor Humidity

Be conscious of activities that can increase indoor humidity, such as cooking, drying clothes indoors, or using unvented gas heaters. Try to reduce these activities or use exhaust fans to expel moist air.

Install Ventilation Fans

Install exhaust fans in kitchens and bathrooms to remove moisture at the source.

Insulate Windows

Ensure that your home is well-insulated. Insulating windows and doors can help prevent warm indoor air from coming into contact with cold surfaces, reducing the likelihood of condensation.

Check Window Seals

Regularly inspect the seals around your windows and doors to ensure they are intact. If there are any gaps or damage, repair or replace them to prevent humid air from entering.

Use Moisture-Absorbing Products

Consider using moisture-absorbing products, such as silica gel packs or desiccants, near windows to help absorb excess moisture. Soaking a towel in vinegar and positioning it between the glass panes is an effective method. The vinegar aids in absorbing excess moisture from the air, while the towel serves as a barrier, preventing the warm air from reaching the cold glass surface. This approach ensures that your windows remain clear and free from condensation.

Seal Leaks

Check for any drafts or leaks in the window frame. Sealing these gaps can help prevent warm, moist air from entering the space between the panes.

Professional Help

If condensation persists or if you suspect a problem with the window seal, it may be necessary to consult with a professional window installer or repair service.

It’s important to note that if condensation is forming between the panes, it may indicate a more significant issue with the window, and professional assistance may be required.

Is Double Glazing Good for Insulation?

Double glazing windows are generally excellent for insulation. Double glazing refers to windows that have two layers of glass separated by a layer of air or inert gas, creating a sealed unit. This design provides several benefits for thermal insulation. The layer of air or gas between the glass panes acts as a thermal barrier, reducing the transfer of heat between the interior and exterior of a building. This helps to keep the indoor temperature more stable and comfortable.

While double glazing is effective, the overall performance can also depend on factors such as the quality of the window installation, the type of glass used, and the presence of additional features like low-emissivity (low-e) coatings or insulating gases (such as argon or krypton) between the panes.

Properly installed and well-constructed double glazing can significantly contribute to a more energy-efficient and comfortable living or working environment.

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