A window seal failure occurs when the sealant between the panes of a double-glazed window breaks down. This can be caused by age, extreme temperatures, or poor installation, leading to the loss of insulating gases like argon or krypton. The immediate consequence of a seal failure is the infiltration of outside air, moisture included, which replaces the insulating gas. This moisture condenses and creates a foggy or cloudy appearance between the glass panes that cannot be cleaned from either inside or outside.

Detecting a window seal failure is relatively straightforward. One of the most obvious signs is the persistent cloudiness within the window that does not clear up with cleaning.

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This cloudy appearance is especially noticeable if the window uses clear glass. If the window incorporates Low-E (low-emissivity) coatings, the signs of seal failure can manifest differently depending on the type of Low-E used. These visual disturbances are often accompanied by decreased thermal efficiency, leading to higher heating or cooling costs.

Fortunately, a full window replacement is not always necessary when dealing with a seal failure. It is possible to simply replace the glass unit. Many glass repair services can assess the type of Low-E coating and the dimensions of the existing pane, providing a new, pre-sealed glass unit. For vinyl windows, this process is particularly straightforward and is regularly performed by service technicians. For other types of frames, such as aluminum, it’s essential to consult with a glass specialist who can source the correct replacement parts.

Knowing when to opt for a glass replacement instead of a full window replacement can contribute to better home maintenance and efficiency. Reach out to a company near you today for residential window repair!



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