https://www.repairmywindowsanddoors.co.uk/merton-misted-double-glazing-repairs-near-me/ Why is My Double Glazed Window Misted? Double glazing is a great method to boost the efficiency of your property and secure optimal energy efficiency. However, if you notice your windows misting then it's usually a sign of a broken window seal. This will allow moisture to enter the insulation section of your window. This can dramatically reduce the performance of your windows. Luckily, this issue is fairly simple to fix. What is it? You might get condensation on the exterior of your double-glazed windows from time to time especially when it's cold and windy. This is a normal indication that your double-glazed windows are blocking out the cold but also letting in heat. It can easily be wiped off, or leave it to be cleared by itself. This is more likely to happen if your double-glazed window mists inside. This is an indication of a damaged seal or a failure in your double glazing. Moisture may get in between the two glass panes in the case of a double-glazed unit that has failed. This could cause the argon, xenon or the krypton gas used in the windows to leak out as well. When this happens the high-density gasses lose their insulation properties, and your window ceases to function as an enclosed unit. One of the main reasons for a window's seal to fail is the natural wear and tear that occurs over the years. This is due to the constant expansion and contraction of the gasses inside your double glazed windows as temperatures rise and fall. Utilizing chemical cleaners that contain abrasives on your double glazed windows can also damage the seal and cause it to fail over time. If the seal of your double-glazed windows has failed the warm air could escape through the glass panes, and cool air could enter creating moisture on the spacer bars inside the glass unit. This is commonly described as a "blown window' and can result in expensive energy bills in winter. This problem can be solve