https://www.repairmywindowsanddoors.co.uk/st-albans-misted-double-glazing-repairs-near-me/ Clear Up Misted Up Double Glazing It's normal for your double-glazed windows to show condensation on the outside. This is a sign they are functioning correctly. Condensation within the glass panes, however is a different matter. Double glazing that has become smudged can be more than just an eye sore. It could also indicate that the seals on your window units with insulation have become damaged or even broken. Seals It is normal for condensation to develop on the outside of double-glazed windows. This is an indication that your windows function properly. It is caused by the air outside heating up faster than your glass and reaching its dew point. If your windows are leaking on the inside this is a major concern and you should take action. The reason is that misting on the inside of your windows typically suggests problems with the seals and that water has made its way through the gap between the two glass panes. The window seals deteriorate over time because of wear and tear. They also degrade when exposed to harsh cleaning chemicals, which could cause damage to the material. Incorrect window installation can cause misting as the installer might not have followed the correct fixing methods or set up the frame and the insulated panels correctly. The gap between the two glass panes in a double-glazed unit is filled with a spacer bar, that creates a thermal barrier and provides insulation. The spacer bar is coated with a desiccant layer that absorbs moisture to keep the gap dry. The condensation occurs when the spacer bar gets damaged or worn out, and the water that is trapped in the gap makes its way through the seals. Poorly fitted and poorly maintained double-glazing isn't just a source of damp and condensation - it can also affect the energy efficiency of your home. This is because defective windows allow cold air in and warm air out, which can cause you to spend more on heat