https://www.repairmywindowsanddoors.co.uk/milton-keynes-misted-double-glazing-repairs-near-me/ What Causes a Misty Window? It can be frustrating when windows in your home or apartment are smudged. It is simple to fix the problem and prevent it from happening if you understand what causes it. Many people suggest using dehumidifiers in order to remove the moisture. However, this does not solve the root of the issue, which is seal failure. Moisture Buildup Moisture is a common cause of misty windows, particularly in homes with older single or double glazed window frames. These types of windows were designed to keep heat inside your home and prevent cold air from entering, but they can also lead to condensation and moisture accumulation. This can result in damage to your window's glass or glass surface, which could result in a more costly repair or replacement. The moisture build-up on windows is typically caused by the collision of cold and warm air. This is most common in homes with high levels of humidity, but can also occur when the seal of your window is damaged or defective. Every day you add 4 to 5 pints of water to the air every time you boil or cook water. Every shower, tumble dryer use and watering of your house plants adds more. Even breathing in and exhaling produces some water vapour. The air inside your home is saturated with water vapour, and as it cools it will liquefy any surface that it comes in contact with, including your windows. If you have a triple or double-pane window and you notice condensation between the panes, it's likely that the seal is broken or damaged. In most cases, there is an opening between two panes of glass and this will be designed to suck any moisture that may be within the gap. The spacer is usually invisible, but it can be identified by shining a light at the window to see if there are streaks or dark spots. If the spacer fails, it is not unusual to discover black mould in this area, which is both visually unattractive and cou