What Causes A Double Glazed Window To Crack?

Most double-glazed windows are supposed to be durable, but it’s not rare for some to break or crack. This can be quite a nuisance and even dangerous. So what causes a double-glazed window to require emergency glass repair? In this article, we look at 4 of the main causes for why a double-glazed window may spontaneously crack.


double glazed window pane


Condensation is caused when warm air comes into contact with cold glass and causes water droplets to form on the inside of the glass. It can be the result of cooking without an extractor or the window open, the running of hot water or it can even be caused by the weather. Too much condensation can cause some serious problems with your glass, including cracking or even breaking! The best way to prevent this is by keeping your home well insulated so there isn’t too much of a difference between indoor and outdoor temperatures. You can also try setting up a dehumidifier in your home if it gets too humid outside.

Poor installation

Another cause of spontaneous cracking might be a poor installation job. Did you notice any gaps around the edges of your window? If so, this could be an indicator that there was not enough insulation in between the panes of glass during installation, which caused them to expand at different rates over time. This will eventually lead to cracks forming between these two panes when they expand or contract during hot or cold weather conditions respectively. To avoid this issue, ensure that you go with a quality double-glazed window supplier. Feel free to ask about their credentials and read their customer reviews/testimonials to get a better impression of a fitter.

Poor Design

Sometimes, a badly designed double-glazed window will not be able to withstand normal wear and tear and would need to be replaced sooner than expected. If you notice any cracks in your window, then you should consider getting it replaced as soon as possible before any further damage is done. It’s also important to check if the frames around the glass panes are intact so that they don’t fall down from their place within the frame itself. To prevent this issue in the future, ensure that you’re purchasing your double-glazed windows from a reputable business.

Excessive heat

Excessive heat is one of the most common causes of double-glazed window cracking. This is because the heat causes the metal of the window frame to heat up more quickly than the glass. As the metal heats up, it expands, which means that it takes up more space than it normally would. This expansion causes stress on the glass, which can cause it to crack or break. One way to prevent this from happening is by keeping your windows closed during periods of high temperatures, which will keep cool air indoors and prevent any build-up of heat in your home.

For more information on what causes a double-glazed window to crack, feel free to contact a member of our team at ASAP Glass today.