How to Stop Condensation On Your Aluminium Window

If you are seeking a more aesthetic and high-quality window to replace your old wooden or uPVC alternatives, aluminium windows make a perfect choice. However, condensation on your aluminium windows can be more than just a nuisance; it can cause dampness, mould, and damage to your home.

Aluminium windows are constructed using a combination of aluminium frames and glass panels. The frames are typically made from extruded aluminium sections that are cut and welded together to form the desired shape and size.

The glass panels are then fitted into the frames using rubber gaskets or sealants to create a watertight seal. While aluminium windows are known for their durability and strength, they can be susceptible to condensation if not properly insulated.

What Causes Condensation on Aluminium Windows?

Condensation occurs when water vapour in the air converts into liquid water on a surface. This process is influenced by factors such as high humidity, low temperatures, and inadequate ventilation. 

When warm, humid air encounters a cooler surface, like a window, it cools and loses its ability to retain moisture, resulting in the formation of water droplets. This is why condensation is commonly seen on windows during colder months, especially when indoor heating is used.

Is Condensation and Aluminium an Issue?

Aluminium windows are rated with a U-value, a measure of their thermal insulation performance. A higher U-value indicates poor insulation, which can increase the risk of condensation on the window frames. As a result, temperature drops can occur, leading to condensation build-up. Older aluminium windows are particularly prone to these problems due to outdated or inadequate insulation.

In contrast, modern aluminium windows are designed with advanced thermal breaks and enhanced insulation, significantly improving their ability to retain heat and minimising the risk of condensation. These improvements ensure better energy efficiency and temperature regulation, making contemporary aluminium windows a more reliable choice for preventing moisture-related issues.

Position of Condensation

Before knowing how to tackle an unwanted build-up of condensation, it is important to recognise where it is forming. This can be done by inspecting your windows, both inside and outside. 

Aluminium Window Frame

Condensation forming on the window frame, rather than the glass, is a common issue with steel or aluminium frames. This could be a sign of poor installation or a structural failure within the frame itself. 

Additionally, if there is excess moisture in the air leading to condensation on the interior glass, this moisture can also be drawn to the colder surface of metal window frames. The cold metal readily attracts moisture, exacerbating the problem.

Aluminium Window Panes

When condensation appears between the panes of glass in your double-glazed or triple-glazed windows, it’s a clear sign that the critical seal keeping the insulating gas contained has failed. This seal failure is a serious issue that compromises the entire purpose and function of your energy-efficient windows. 

The windows in your home are designed with multiple panes of glass separated by a layer of inert gas, typically argon. This gas-filled space acts as a highly effective thermal barrier, preventing heat transfer and dramatically improving the insulating properties of the window. However, if the airtight seal around the perimeter of the window fails, it allows moisture from the air to infiltrate the enclosed space between the panes. This moisture then condenses, creating those unsightly water droplets or fog you see trapped inside the window.

The most effective way to resolve this issue is to replace the insulated glass unit, or, if the problem is more extensive, consider replacing the entire window.

Inside and Outside the Windows

Excess moisture is often the primary cause of window condensation. This can be especially the case with colder climates. It can also be spurred on by activities such as bathing, cooking etc as they cause the humidity levels to increase. Unless there is good ventilation in the house, moisture will form on the inside of your aluminium windows. To reduce this issue, improved ventilation such as extractor fans should be installed. Also, keeping the window open now and then can give excess moisture an effective escape route. 

However, if you detect condensation on the outside of your window, don’t be alarmed because that is actually a good sign. This is because the indoor temperature is warmer than the outside, so your windows are doing a good job.

How to Stop Condensation on Aluminium Window Frames

To prevent condensation from forming, there are a few steps you can take. 

Good Ventilation

Open windows regularly to let fresh air circulate. Even letting a breeze flow through for a short while can make a big difference. Open windows or use exhaust fans in areas such as the kitchen and bathroom to help lower humidity and reduce moisture levels in the air.

Use a Dehumidifier

You can also use a dehumidifier to reduce excess moisture in the air. Alternatively, applying a silicone-based sealant around the window edges can help prevent warm air from escaping, reducing condensation on the cold aluminium frames. These devices help remove excess moisture from the air and make a noticeable difference in your window’s clarity.

Adopt Insulation Measures

It is essential to ensure that windows and doors are properly insulated and sealed to minimise heat and moisture transfer between the interior and exterior of the building. In addition, installing double or triple glazing can significantly reduce condensation by creating an effective barrier between the warm indoor air and the cold outdoor air. You can always get your windows replaced if the condensation is too severe,

Regulate Indoor Temperature

Keeping your house at a consistent temperature will minimise any fluctuations which lead to condensation on your aluminium windows. This will, in turn, manage the temperature difference between the warm air inside and the cold surface of the window.

Wipe it Down

Sometimes wiping the condensation away from your windows can be the most simple and effective solution. Simply use a soft cloth and wipe down the condensation as soon as possible. Leaving it there can lead to mould, which can cause health problems. 

Benefits of Aluminium Windows

• Produces thermal efficiency, ensuring your home stays warm while reducing energy costs.
• Contains high-security features for enhanced peace of mind.
• Requires minimal maintenance, making them an ideal, hassle-free option.
• Aluminium frames are exceptionally strong and durable compared to uPVC, offering long-lasting performance.
• Has a sleek and modern design combining aesthetics with functionality.

Condensation on aluminium windows doesn’t have to be a permanent headache. By understanding the causes and using these practical tips, you can create a more comfortable, drier home. By being proactive, you can keep your windows clear and maintain a healthier living environment.

If you are looking for high-quality aluminium windows and doors, Klosen offers contemporary windows which are both strong and stylish. With our extensive range from aluminium sliding windows to flush aluminium options, we provide sleek slim lines to enhance your property.