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Why is My Double Glazed Window Misted? Double glazing is a fantastic way to improve the efficiency of your home, and to ensure the highest efficiency in energy usage. If you notice that your windows are misting, then it's usually a sign of a broken window seal. This allows moisture to enter the insulation section of your window. This will drastically reduce their performance. Fortunately, this issue is fairly simple to fix. What is it? It's possible to get condensation on double-glazed windows, especially if it is very cold and windy. This is a sign that your double glazed windows are blocking out the cold, but let in heat. You can clean it up or let it clear by itself. If your double-glazed window mists on the inside though this is a more serious issue. This is typically a sign that the seal on your double glazing has deteriorated, or 'failed' as it is known in the trade. Moisture can enter between the two panes of glass in double-glazed units that have failed. The argon, xenon, or krypton gases that are employed in these units could also leak out. When this happens the high-density gases lose their insulation properties and your window is no longer a sealed unit. Natural wear and tear is among the primary reasons for seals to fail on windows. This is caused by the constant expansion and contraction of the gases within your double glazed windows when temperatures fluctuate. Using abrasive chemical cleaners on your double glazing can cause damage to the seal and cause it to fail over time too. If the seal of your double-glazed windows is damaged the warm air could escape through the glass panes and cool air can enter, causing moisture buildup on the spacer bars inside the glass unit. This is often referred to as a 'blown' window and it can result in expensive energy bills in winter. Replacing the glass units in the double-glazed windows you have can solve this issue. This is a more cost-effective alternative to replacing the entire window. It can also ensure that your home will be adequately insulated and sealed. It is also important to ensure whether the company that is that is replacing your double-glazed windows are insured. This will protect you in case of any unexpected problems. What is the reason for this? Condensation inside double glazing isn't just unsightly but it can also cause mildew which will deteriorate timber window frames. In extreme cases black mold can also develop on window frames and cills which isn't good for you or your family. Understanding the reason for condensation is vital to know how best to deal with it. Condensation occurs when the temperature of a glass is below the dewpoint – which is the temperature at which the water vapour from the air changes into liquid water. This is the reason it usually occurs at night or early in the morning, when the dew point is at its highest and the air outside is warmer than the glass surface temperature. As the weather gets colder and the humidity levels increase condensation in double-glazed windows is more likely to occur because it forms much faster. It is generally a natural phenomenon, and doesn't mean that your double glazing has an issue. If the condensation is visible from the outside of your window and disappears when the sun rises, there is no reason to worry about it. Double glazed windows that are damaged or defective will not insulate as well as they should, which could lead to higher bills. If the seals are broken then moisture could pass through the two glass panes and will eventually cause a misting effect. There are many reasons for misted double glazing, but there are a few that are worth examining. If you see condensation on the inside of your window, this is usually the first sign that something is wrong. Glass damage or water stains caused by trapped moisture in between the two panes could be the next step. cost of replacing misted double glazing units could be due to damage during installation or simply wear and tear as time passes. In some cases, this could be a sign that the window is reaching the end of its life and requires replacement to improve the overall insulation performance of your home. How do I get rid of it? Double glazing is a great investment in the energy efficiency of your home and the appearance of your windows. If your double glazing is cloudy or misty it could ruin the appearance of your windows. Thankfully, the answer to this problem is easy and cost-effective. Double glazing that has mist is caused by condensation or moisture entering the space between the double-glazed windows which must be airtight. This is normally an indication of a damaged seal inside your window and is in need of fixing. Condensation on the exterior of windows with double-glazed glass is normal, particularly in colder weather. This happens when the glass is cooled down by air that has heated up and reached its dew point. The water vapour will be visible when it gets to the cold surface on your windows. It will disappear once the glass warms back up. It is usually only when the double-glazed windows inside mist that you have to do something about it. This is because the condensation is indicating that there has been damage to the seal between the two panes of glass in your window and can be a sign of poor installation or chemicals used in cleaning products. There are a variety of ways to get rid of the condensation on your double-glazed windows. You can wipe them clean with a damp cloth in order to eliminate the condensation. You can also spray them with glass cleaner that has been specifically designed to remove the haze of condensation. You can also install the dehumidifier inside your home, which will help to absorb moisture and stop it from accumulating on windows. There are professional steps that can be used to eliminate double glazed window mist, this involves drilling a small hole into one of the windows and pumping into a specially-formulated desiccant which helps dry out the window and avoid further problems. This can be a risky procedure and should only by done by an expert. This procedure will restore the double-glazed windows back to their original condition and will ensure that you don't suffer from condensation or misting problems in the future. What is the best way to solve this problem? Condensation is commonplace on the exterior of new double-glazed windows. This is a sign that windows are functioning properly and it can easily be removed. The condensation is caused by the temperature difference between the air inside the house and the cold glass surface of the window. However, if there is condensation between the glass panes of your double glazing, it is not normal and should be dealt with immediately. The window seal has been damaged and moisture has the ability to get into the space between the glass panes. This can cause windows to lose their insulation properties, and affect the energy efficiency of your home. The most effective way to minimize condensation on your double-glazed windows is by improving the ventilation of your home. Open your windows daily to let fresh air enter your home and reduce humidity. It is recommended to use extractor fans in areas that produce a lot of moisture such as kitchens and bathrooms. Dehumidifiers are also a great option to effectively remove excess moisture from the air and keep condensation on cold surfaces, such as window glass. Another effective solution for reducing condensation in your double glazed windows is to wipe the glass with an anti-fogging item. These products are available in most hardware stores. They are designed to stop condensation of moisture. However, it is important to remember that these solutions aren't permanent and will require reapplication regularly. If your double-glazed windows are still covered by warranty, getting in touch with an experienced installer is the best option to fix the issue. A FENSA-regulated company will provide 10 years of warranty and will adhere to UK Building Regulations.