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How Long Should Double Glazed Windows Last?

If you’re a smart homeowner looking to enhance your property, you may want to install a complete set of new windows. Upgrading to a fresh set of windows can substantially enhance the energy efficiency, aesthetics, and safety of your home. However, it’s equally crucial to ensure that this improvement doesn’t break the bank, and that you only look towards this option when you need to. With this in mind- how long should double glazed windows last?

As time passes, your windows are prone to degradation, particularly as they age. The thermal efficiency of windows diminishes over time, and older panels tend to become distorted, warped, or cracked. Windows made with outdated materials, such as timber, may also encounter issues like rotting, splintering, or paint peeling. Therefore, it’s worth considering replacing all your older windows in light of these concerns.

At T&K Home Improvements, we offer valuable guidance for any and all home improvement projects. We collaborate with our clients to deliver top-notch home improvements that suit any budget. Let’s address the question at hand: What is the typical lifespan of double glazed windows?

The Lifespan of Double Glazed Windows

Double glazed windows have become a popular choice for homeowners in recent years due to their energy efficiency, noise reduction, and overall aesthetic appeal. However, like any other component in your home, they won’t last forever. So, how long should double glazed windows last?

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The lifespan of double glazed windows primarily depends on various factors, such as the quality of the installation, environmental conditions, and maintenance. Proper installation by a professional and reputable company can significantly impact the longevity of your windows- which is why searching for a high quality installation company, like us here at T&K, could not be more important. Poor installation can cause air leaks, resulting in foggy glass and decreased energy efficiency, ultimately reducing a window’s lifespan.

Environmental conditions can also play a significant role in how long your double glazed windows last. Extreme weather conditions, such as high temperatures, heavy rain, and strong winds, can cause damage to your windows over time. In areas with harsh weather conditions, it’s essential to choose double glazed windows designed to withstand those conditions.

Maintenance is another crucial factor in determining the lifespan of your double glazed windows. Regular cleaning, re-sealing, and proper ventilation can help prevent condensation build-up, which is a common window killer. Condensation can lead to mould and mildew growth, ultimately reducing the lifespan of your windows.

How Long Should My Windows Last?

On average, double glazed windows can last up to 20 years or more with proper care and upkeep. However, many manufacturers offer warranties for up to 25 years or even a lifetime, indicating their confidence in the durability of their products.

Double glazed windows can last up to 20 years or more with proper installation, maintenance, and environmental conditions. Choosing high-quality double glazed windows, proper installation, and regular upkeep jobs can significantly impact their lifespan. If you notice any signs of wear and tear, consider replacing them to maximise their energy efficiency, security, and overall value.

Do Materials Matter?

uPVC and aluminium windows are both popular choices among homeowners due to their durability, energy efficiency, and low maintenance requirements. The lifespan of uPVC windows is generally between 20-30 years, making them a long-lasting option for your home. They are also resistant to weathering and rotting, which can further increase their lifespan.

On the other hand, aluminium windows have a lifespan of around 30 years or more and are known for their strength and durability. They are resistant to weathering and corrosion, making them a suitable option for homes in coastal areas. Ultimately, the lifespan of uPVC or aluminium windows will depend on various factors, such as installation, maintenance, and environmental conditions. However, both types of windows can provide long-lasting benefits to your home.

When Should I Replace My Windows?

Suppose your double glazed windows are approaching the end of their lifespan or showing signs of wear and tear, such as cracked or foggy glass, air leaks, or difficulty opening and closing. In that case, it’s time to consider replacement. Upgrading to new double glazed windows not only improves your home’s energy efficiency and security but also increases your home’s value.

Looking for replacement double glazed windows? Look no further than our range available at T&K. We are top notch installers of double glazing in and around Northamptonshire, with multiple awards to back up our proficiency! Get started online using our quote tool. Contact us today using our online form or give us a call on 01933 677444. We look forward to hearing from you.


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