If you’ve ever had new windows fitted, you’ve probably heard about double glazing. It’s a popular way to keep homes warmer, quieter, and more energy-efficient. But like anything else in your home, double glazed windows won’t last forever. So, how long can you expect them to last?
On average, double glazed windows can last anywhere from 20 to 35 years. The exact lifespan really depends on things like the quality of the materials, how well they were installed, and the general care they receive over the years. For example, https://www.hadleighglass.co.uk/windows-double-glazing/ installs windows using modern techniques and good materials, which can help them last closer to that 35-year mark.
Now, double glazed windows work by sealing two panes of glass together with a layer of gas (usually argon) in between. This helps keep your home warm in winter and cool in summer. Over time, though, the sealed unit can wear out. One of the first signs of ageing is condensation or mist appearing between the panes. This means the seal has failed and the gas has escaped, which reduces the window’s insulation.
Weather also plays a part in how long your windows last. If you live by the coast or in a place with harsh seasons, your windows might wear out quicker because they’re exposed to more moisture and stronger winds. Frames made from uPVC usually last longer with less upkeep than timber ones, which may need repainting and extra care.
Regular cleaning and checking the seals now and then can help you get more years out of your windows. If you're noticing drafts, outside noises creeping in, or your energy bills going up, those could be signs your windows aren’t working as well as they should.
Replacing only the glass unit instead of the whole frame is often all that’s needed, which can save money if the rest of the window is still in good shape.
So, if your double glazed windows are approaching 20 years or you’ve spotted cloudy glass, it might be time to start thinking about repairs or replacements. They play a big role in keeping your home comfortable and energy efficient, so keeping an eye on them as they age is always a good idea.