https://www.repairmywindowsanddoors.co.uk/kingswood-misted-double-glazing-repairs-near-me/ Why is My Double Glazed Unit Misting Up? When condensation appears on the exterior of double-glazed windows, it is not an issue and in fact, it is a sign that your windows are working correctly and keeping heat in your home. If it appears on the inside of windows it's a sign of a problem. If you see moisture trapped between your windows, it means that the seals are not working properly. This can lead to higher heating bills and lower insulation. This can be caused by a variety of reasons. 1. The seals are not working properly Condensation that has gotten into the space between the glass panes is the most common reason for misting appearing on the outside. Typically condensation appears as a cloudy layer and reduces your window's transparency. The misting in double-glazed windows is much more serious, and is a sign that the seals of the insulating unit are failing. This means that the seal is broken and moisture has found its way into the two glass panes, leading to the fogging and decreasing your window's energy efficiency. Double glazing that fails could also affect the appearance of your home and the safety of your family. There are a myriad of reasons for your double-glazed windows to fail. These include natural wear and tear, defective installation or design issue with your window frame. It is crucial to only use an experienced and reliable installation company that will guarantee their work, and not void any warranty provided by the manufacturer. One of the main reasons that your double glazed units could fail is because they have become damaged by water. This could be the result of poor installation or maybe a lack of drainage or spacer blocks. The moisture can then seep into the seals, causing them to break over time. This can lead to condensation between the glass panes. Another common reason for a failed double-glazed unit is that the desiccant in the unit becomes sat