Why is My Double Glazed Window Misted?
Double glazing is an excellent way to improve the efficiency of your property and ensure maximum energy efficiency. If you notice that your windows are leaking this could be a sign that the seal on your window is broken.
misty window allows moisture to enter the insulation area of your window. This can dramatically reduce their performance. Luckily, this problem is quite easy to resolve.
What is it?
It's possible to get condensation on your double-glazed windows, particularly when it is very cold and windy. This is normal and a sign that your windows are functioning effectively, keeping cold out and heat in. It can be easily cleaned off, or leave it to be cleared by itself.
If your double-glazed window mists on the inside this is a more serious issue. This is usually a sign that the seal on your double glazing has failed, or 'failed' as it is referred to in the trade. When a double glazed seal unit breaks down or fails, moisture may be able to get into the panes of glass that make up your window. The argon,xenon orkrypton gases that are employed in these units could also leak out. After this happens the high-density gases lose their insulation properties, and your window will no longer function as an enclosed unit.
Natural wear and tear is among the main reasons that cause seals to fail on windows. This is due to the constant expansion and contraction of gases inside your double-glazed windows as temperatures change. Utilizing chemical cleaners that contain abrasives on your double glazing can cause damage to the seal and cause it to fail in time.
If the seal on your double glazed windows is broken this means warm air can escape between the glass panes and cool air can enter which causes condensation to form on the spacer bar inside the glass unit. This is known as a "blown" window and could cause costly energy bills in winter.

Replacing the glass units in your double glazed windows can solve this problem. This is a more cost-effective alternative to replacing the entire window. It can also guarantee that your home will be properly insulated and sealed. It's important to make sure that the business you choose to replace your double-glazed windows is properly insured, since this will protect you in the event of unexpected issues with your installation.
What is the reason for this?
Condensation inside double glazing isn't only unsightly but it can also lead to mildew which will deteriorate timber window frames. In extreme cases, black mould can even grow on window frames as well as cills, which isn't great for you or your family.
Understanding the causes of condensation is essential to understand how best to deal with it. Condensation occurs when the temperature of the glass falls below the dew point, the point at which the water vapour in the air transforms into liquid water. It is therefore common to observe it at night or in the early morning, when the dewpoint is at its highest and the temperature of the air is higher than the glass's surface.
Condensation inside double-glazed windows will become more frequent as the temperature drops and humidity levels rise. In the majority cases it's a normal occurrence and does not indicate an issue with your double glazing. If the condensation only appears on the outside of the window and disappears when sun comes up there is no reason to worry.
Damaged or defective double-glazed windows won't insulate your home as well as they ought to and this could result in more expensive energy bills. If the seals are broken then moisture may be trapped between the two panes of glass and will eventually cause the misting effect.
There are many causes of misted double glazing, however there are a few that are important to consider.
The first sign of a problem with your double glazed windows is usually when you start to notice condensation forming on the inside of the window. Glass damage or water stains caused by moisture trapped between the two panes could be the next step. This could be due to damage from installation or simply wear and wear and tear. In some cases, this could be an indication that the window has reached the end of its life and needs replacing to improve the insulation efficiency of your property.
How can I remove it?
Double glazing is an excellent investment to improve the efficiency of your home's energy usage and the appearance of your windows. But, if your double glazing is smudged or cloudy, it could ruin the appearance of your windows. Thankfully, the answer to this issue is simple and cost-effective. Double glazing that is misted is caused by condensation and water entering the space between the panes of your double-glazed window that should be sealed airtight. This is usually an indication of a broken seal on your window that is in need of fixing.
It is common for double-glazed windows to develop condensation on the outside, particularly in cold weather. This happens because the glass is cooled down by the air that has heated up and reached its dew point. When the water vapour reaches the cold surface of your windows it becomes visible and disappears once the glass warms up again.
It is usually only when the double-glazed windows are smoky that you have to take action. This is because the condensation is signalling that there is a problem to the seal between the two glass panes of your window and could be a sign of poor installation or the use of chemicals used in cleaning products.
There are several ways to get rid of the condensation on your double-glazed windows. You can try wiping them clean using a damp cloth. This will normally remove the condensation. You can spray them with a glass cleaner that is designed to eliminate the haze caused by condensation. You can also put in dehumidifiers to help absorb moisture and stop it from getting into windows.
Professionally-designed solutions can be used to repair double-glazed mist. This involves drilling a hole in one of the windows, and pumping a desiccant into the window. This will help dry out the glass and stop future problems. However, this procedure is risky and should only be carried out by a qualified professional. This solution will restore the double-glazed windows to their original condition and ensure that you don't face any misting or condensation issues in the future.
What is the best option?
It is normal for double-glazed windows to show condensation on the exterior surface of the glass panes. This is a sign that your windows are working well. It is easily removed. The condensation is caused by the temperature difference between the air in the house and the cold glass of the windows.
However, if you have condensation between the panes of glass that make up your double glazing, this is not normal and should be dealt with immediately. The window seal is broken and water can get into the gap between the glass panes. This could cause windows to lose their insulation properties and will reduce the efficiency of your home.
The most effective way to reduce condensation in your double glazed windows is to improve the ventilation within your property. Opening the windows regularly will lower humidity levels and allow fresh air to circulate around your home. It is recommended to make use of extractor fans in areas that produce lots of moisture, like bathrooms and kitchens. Dehumidifiers can also be useful in actively taking excess moisture out of the atmosphere and stopping it from condensing on cold surfaces, such as window glass.
Cleaning the glass of your windows with anti-fogging solutions is a great method to reduce condensation in double-glazed windows. These products are readily available in most hardware stores and are designed to stop the accumulation of moisture. It is crucial to remember that these solutions aren't long-lasting and need to be applied regularly.
If your double-glazed windows remain covered by warranty, getting in touch with an experienced installer is the best way to solve the problem. A FENSA-regulated company will provide a 10-year guarantee and adhere to UK Building Regulations.