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Why Does Condensation Form On Windows?

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One of the most annoying problems that have come to haunt home owners all over the world is condensation on windows. This can be a real a real issue for your property, making it hard to see out of your windows as well as the damp and mould that the condensation can bring with it.

So what causes windows to build condensation? The answer comes down to the actual temperature of the glass panes in your windows.

Generally, condensation is found mostly on single pane windows. This single pane of glass has contact with the cold weather outside as well as the nice warm temperature inside your home. The problem starts when the glass pane is colder than the internal temperature of your home. This is usually the case with single pane windows and it is at this point that condensation is formed. Your nice warm air inside your home makes contact with the cold glass pane and at this point, water vapour is created and starts to become visible on your windows. As this is left, more and more water vapour is formed until your windows are covered in condensation with the warm, wet frames of your windows beginning to attract mould. This is a costly and potentially dangerous situation to be in. If the windows are that cold that condensation is forming, then your home is not going to be very energy efficient, with most of the nice warm air you are creating inside escaping through the windows. This could also be dangerous as the wet frames give the perfect breeding ground for mould, which is not correctly treated, can turn into a life threatening black mould.

Double Glazed Windows

The problem doesn’t stop at single pane windows; double glazed windows can also have the same issues. Double glazed windows in good condition are designed to avoid this type of problem. This style of window has two separate panes of glass with an argon gas in between them. This argon gas helps to insulate the window, keeping your lovely warm air inside and the cold temperatures out.

Double glazed windows do however have a shelf life. At some point, double glazed windows can fail and this is when condensation can show its ugly head. If a double glazed window fails, gaps can appear in the seal. This allows the argon gas to escape and cold air to fill the space between the panes. The space in between your two panes of glass can now be just as cold as your single pane window would be in the example above. This is when condensation can kick in. The condensation, in this case, would form in between the two panes of glass making it even harder to get rid of. You cannot physically touch or wipe away the condensation in this case as it is encased in the middle of your double glazed unit. This makes it impossible to see through and the only cure is to replace the entire panel or find an expert who can repair the double glazing.

Condensation can be a real problem on all windows, but if you keep your windows in good condition and remember to replace them at the suggested timings from the manufacturer, then you should stay clear of condensation for your home.

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