How Do I Know If My Double Glazing Needs Replacing?

Wednesday, 7 February 2024

If installed correctly and with high quality units, double glazing can last decades. However, there comes a time when your double-glazing units will need replacing. If you have an older property, it is likely that the glazing hasn't been replaced in many years and may even still have single glazing. It can be hard to work out whether it is time for a replacement, which is why we have created this helpful guide to show you tell tell signs that your windows or doors need replacing. How long your windows and doors last depends on a few factors, including the weather conditions you are exposed to, the installation and the quality of your glazing. Read this article to see how you can determine if your double glazing needs replacing.

Sign that your double glazing needs replacing.


From a distance your double glazing units may look perfectly fine, however upclose there are fine details that can be warning signs that your windows and doors are outdated and underperforming. Look out for excessive condensation; this is a sign that moisture is entering your home, and you may have broken seals within your double glazing. Fogginess between the glass panes indicates that the seals have failed; if this happens, then the air bubbles and gas between the panes can escape, and all its abilities to retain heat and slow down heat transfer will disappear.


Another sign that your double glazing isn't working is mould; mould is a red flag that moisture or water is entering your windows and creating condensation, which causes mould. Mould can end up causing health problems if not sorted, so if you notice mould in your home, it is essential to replace your windows or doors as soon as possible.


If the seal around the double glazing has worn away, then you may experience leaks; if you start to notice large amounts of water entering your home, then we recommend that you replace your double glazing as soon as possible. At Bill Butters, we want you to feel comfortable and relaxed in your own home, which is why we want to help you create the most thermally efficient space possible.

Excess Noise

Due to the thickness of double glazing, they are excellent at reducing noise pollution; if you notice that too much noise is coming from the outside environment, then it is a sign your glazing isn't working efficiently.


One significant warning sign that your double glazing needs replacing is if you are experiencing droughts in your home, which means that the cold outside air is easily penetrating your home. Replacing your double glazing will ensure that the warmth stays trapped in your home and the cold air remains outside.

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Have you noticed an increase in your energy bills?

Have you noticed that it is harder to keep your home warm? This may be because your double glazing is underperforming. Double glazing is designed to keep the warmth inside your home for a warm and cosy space. Double glazing consists of two thick glass panes that are separated by a gap that is filled with air bubbles of argon gas that work to slow down heat transfer, trap the warmth that you produce inside your home, and keep the cold breeze out. Suppose your double glazing isn't working correctly. In that case, it could be losing you money, as you are spending more money heating and cooling your home due to being more reliant on your central heating in the warmer months and cooling systems in the colder months, which increases your energy bills.

If you have noticed an increase in your energy bills, this may be due to the fact that your home is working harder to retain the warmth you produce. By replacing your glazing, you can save yourself money on your energy bills, as double glazing is highly energy efficient and provides added thermal comfort.

How much does double glazing cost?

If you are looking to upgrade your double glazing, Bill Butters offers high quality double glazing at an affordable and competitive price. Bill Butters has been installing double glazing units for over 30 years, so we have the knowledge and experience to provide the very best solutions for our customers.

Use our online quoting engine to see how much double glazing would cost you, input your home's measurements and receive a free bespoke quote based on your specifications. For more information on our double glazing home improvement solutions, contact us, and we can discuss your project in more detail. Fill out our contact form, and we will get back to you as soon as possible.

We look forward to hearing from you.