https://www.repairmywindowsanddoors.co.uk/sittingbourne-misted-double-glazing-repairs-near-me/ Clear Up Misted Up Double Glazing Condensation on the exterior of your double-glazed windows is normal and is a indication that they're operating just as they ought to. Condensation within the glass panes however, is a different story. Double glazing that is misty is more than just an eye-sore It could also be an indication that the seals on your window unit's insulated seals have broken down or deteriorated. Seals When condensation forms on the outside of your double-glazed windows, this is perfectly normal and is a indicator that your windows are functioning well. This is because the air outside is reaching its dewpoint quicker than the glass. If your windows are misting up on the inside, this is a more serious issue and something you will need to address. This is because misting that occurs on the inside of your windows is usually an indication of a seal problem and that water is entering the gap between the two panes. The window seals deteriorate over time as a result of ageing and wear and tear. They also degrade if they are exposed to harsh cleaning chemicals which can damage the material. Poor window installation can also cause misting as the installer might not have utilized the proper fixing methods or fitted the frame and insulated panels correctly. A spacer bar is used to fill in the gap between two panes in a double-glazed window. This creates a thermal barrier and also provides insulation. The spacer bar is coated with a desiccant layer that absorbs moisture, keeping the gap dry. The condensation occurs when the spacer bar is damaged or worn out, and the water inside the gap makes its way through the seals. Poorly fitting and badly maintained double-glazing isn't just a source of condensation and damp, it can also impact the energy efficiency of your home. Faulty windows let cold air in and warm air to escape and you'll have to spend more on heating your home.