https://www.repairmywindowsanddoors.co.uk/hounslow-misted-double-glazing-repairs-near-me/ Clear Up Misted Up Double Glazing Condensation on the outside of double-glazed windows is common and is a indicator that they're functioning in the way they should. Condensation within the glass panes however, is a different story. Double glazing that is misty is more than a nuisance It could be a sign that the seals on your insulated window unit have worn out or become damaged. Seals It is normal for condensation to develop on the outside of double-glazed windows. This is an indication that your windows work well. It is due to the air outside heating up more quickly than your glass, and then reaching its dew point. If your windows mist up on the inside this is a major problem and you must investigate it. This is because misting that occurs on the inside of your windows is typically an indication of a leak in the seal and water is getting into the gap between the two panes. Window seals wear out over time due to aging and general wear and tear. They also become damaged when exposed to harsh cleaning chemicals, which can cause damage to the material. A poor window installation could cause misting as the installer may not have followed the correct fixing techniques or installed the frame and insulated panels properly. A spacer bar can be used to fill the gap between two panes of windows that are double-glazed. creates a thermal barrier, and also acts as an insulation. The spacer bar is coated with a desiccant that is specially designed, which absorbs moisture and keeps the gap dry. The condensation appears when the spacer bar gets damaged or worn-out, and the water that is trapped in the gap is able to pass through the seals. Poorly fitted and poorly maintained double-glazing isn't just a source of condensation and damp - it can also impact the energy efficiency of your home. This is because faulty windows will let cold air in and warm air out, causing you to pay more for heating