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Window Seal Failure: The 5 Common Causes




Whether you own double hung or casement windows, you’ll always have to make sure that the seal of your windows are intact. Otherwise, heat can escape from your home and allow drafts to enter, causing your utility bills to spike up. With that in mind, it’s important that you learn as much as you can about the usual causes of window seal failures.

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  1. Elements – While window seals are made to withstand the elements, they’re not actually invulnerable. For instance, if your seal faces large volumes of rain on a regular basis, water can easily seep behind it and cause it to lift. This can be problematic as the seal will no longer be in contact with the window frame and may even allow water and cold air to pass through into your home.

  1. Maintenance – Windows will require maintenance every now and then if you want them to last as long, and to accomplish this, they often come with instructions to help owners properly maintain them. Therefore, always make sure that the weatherstripping is properly maintained to prevent any issues with the window seal.

  1. Temperature – Your window is often subject to extreme temperature, and prolonged exposure to heat or cold can cause the window seal to crack, shrink or even sag. This can render its protective capabilities against the weather useless. 

  1. Mold – Surprisingly enough, mold is another reason why your window’s seal may fail. It can destroy its effectiveness, especially if it’s made from rubber so make sure to clean it as soon you spot it with an alcohol-based cleaner or even vinegar to prevent further damage.

  1. Age – Of course, one cannot discount the age of the window as a possible reason why its seal is failing. If your window has some years behind it, it’s possible it has an older method of weather protection that makes it more likely to fail. To get around this, update the weatherstripping of your windows as soon as possible.

For the best vinyl replacement windows, look no further than Renewal by Andersen® of Southwest Missouri. We are your leading provider of door and window installation services. Give us a call at (417) 351-2801, or fill out our contact form to schedule a free consultation.


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