https://www.repairmywindowsanddoors.co.uk/grays-misted-double-glazing-repairs-near-me/ Why is My Double Glazed Window Misted? Double glazing is a great way to improve the efficiency of your home and guarantee maximum energy efficiency. However, if you notice your windows misting it is a sign of a broken window seal. This will allow moisture to enter the insulation portion of your window. This could drastically decrease the performance of your windows. Luckily, this issue is relatively simple to fix. What is it? is possible to experience condensation on your double-glazed windows, especially when it's extremely cold and windy. This is normal and a indicator that your windows are functioning well, keeping the cold out and the heat in. You can clean it up or let it go away by itself. If your double glazed window has a tendency to mist on the inside though this is a more serious issue. This usually means that the seal on your double glazing has failed or 'failed' as it is referred to in the field. The moisture can get inside the two glass panes in double-glazed units that have failed. This could cause the argon, xenon or Krypton gas that is utilized in the windows to leak out as well. Once this happens the high density gases lose their insulating properties and your windows are no longer a sealed unit. One of the primary reasons for a window's seal to fail is the natural wear and tear over the years. The constant expansion and contraction in your double-glazed windows are caused by temperature fluctuations. Cleaning with chemicals that are abrasive on your double glazed windows can also cause damage to the seal, and lead to it failing over time too. If the seal on your double glazed windows is damaged, it means that warm air can escape between the glass panes, and cool air can get in, causing moisture to build up on the spacer bar in the glass unit. This is commonly described as a "blown window' and can cause costly energy bills during winter. This issue can be addresse