Signs It’s Time to Replace Your Existing Double Glazed Window


Nothing lasts forever, especially your windows. Double-glazed windows can last up to 20 years if they are well-maintained. However, there are a number of factors that can greatly reduce this lifespan. If you have double-glazed windows, you need to know the signs that it’s now time to replace them. Here are a few to keep an eye out for.


Condensation occurs when the temperature of the outside air permeates the warmer inside air, and the air transforms, or “condenses,” into droplets of water that you will see on your window surface and frame. When condensation comes into the space between your double glazing sheets, this is a sign that the seal has developed a leak. If you see the windows misting up, this can be a sign that the windows are blown, which is when a gap between the glass panels opens up, allowing moisture or condensation to come through.

Chips and Cracks

If you can see any signs of wear and tear like chips or cracks in the glass pane, this causes long-term concerns. A chip or a crack in the glass means the window is not working effectively, which can result in draughts, leaks, or condensation, not to mention leaving your home far more vulnerable.

Water is Leaking in

Condensation is a common occurrence, but if you are experiencing a lot of adverse weather and water is leaking through the window frames, this could be a sign there is an issue with the weather seal. When windows are approaching the end of their shelf life, it is far more efficient to replace them rather than attempt to fix the seal. When water leaks through the window frames, this can be hard to fight and can result in mould, which causes a number of adverse health effects, including a higher likelihood of developing allergies, infections, and a lower immune system.

You Can Feel Draughts

One of the most common signs you have issues with your double glazing is if you can feel a draught around the sealants, which is an indication the seals have worn away. While you have the option to replace the weather seals, depending on the age of the windows, it may be more effective to replace your windows completely.

Your Energy Bills Have Risen

Everybody is trying to keep their energy bills down, and when you notice your energy bills are creeping up, this could be because you are keeping the heating on for longer. As double glazed windows are designed to keep the heat in and the cold out, if your double glazing is not doing the job it was meant to, it is time to make a few changes.

They Are Becoming More Difficult to Use

Windows are meant to be easy to open, and if they’re not functioning as they should, meaning you need to force the window open, you need to consider installing new windows. If you are looking to upgrade or replace your double glazing, at Cambridge Window Company, we provide a free and friendly no-obligation quote, so get in contact with us today.

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