How Long Should Double Glazing Last?
Have your windows started to mist up just a few years after installation?
At Totalseal Repairs, we often get asked how long double glazing should last before it starts misting up and have put together this helpful guide revealing all.
On average, double glazing should hold up for about 15 to 20 years without any major problems, but this isn’t a hard and fast rule. Accidental damage and poor installation can significantly reduce the lifespan of double glazed units and lead to internal condensation or ‘misted windows’ far sooner than should be the case.
The last thing you want is to have to pay for an entire new window just a couple of years after installation, and with our double glazing repair Glasgow, you won’t have to.
Why Do Double Glazed Windows Mist Up?
Double glazed units are made up of two panes of glass with a sealed space in between, usually filled with an inert gas like argon to help insulate your home. Over time, the seals that keep the gas in place and moisture out can break down. When that happens, moisture gets inside the sealed unit, leading to that misty or foggy appearance.
In most cases, misting occurs because the seal has failed. Seals can break down for various reasons, including age, exposure to the elements, or even poor installation. When moisture gets in between the two panes, it means the insulating properties of the window have been compromised, resulting in condensation and reduced energy efficiency.
Expected Lifespan of Double Glazing
On average, double glazing should last between 15 and 20 years before you start noticing misting or other issues. Well-maintained windows can last even longer. The quality of the original installation and the materials used play a big role in how long double glazing will stay in good condition.
For example, if the double glazing was installed by a reputable company using high-quality materials, it might last closer to 25 years. On the other hand, if corners were cut during installation or if the windows were made with lower-quality seals, you might start seeing issues after just 10 years. It’s always worth investing in quality from the start to get the best value over the long term.
Signs That Double Glazing Needs Attention
Misting isn’t the only sign that double glazing might need some attention. Here are a few other things to look out for:
- Condensation Inside the Unit: If you see condensation building up between the panes of glass, it’s a clear sign that the seal has failed. This can lead to reduced insulation and increased heat loss.
- Drafts: If you feel a draught near the window, it could mean the window isn’t sealing properly anymore. This can make your home less energy-efficient and increase heating costs.
- Difficulty Opening or Closing: Over time, windows can warp slightly, making them difficult to open or close. This can also affect how well they seal, leading to potential draughts.
If you notice any of these issues, it’s probably time to call in a professional to assess whether a repair or replacement is the best option.
Preventing Misting in Double Glazing
There are a few steps you can take to help prevent misting and prolong the life of your double glazing. Regular maintenance is key. Here are some tips to help you get the most out of your windows:
- Check the Seals Regularly: Inspect the seals around your windows every year or so. If you notice any cracks or gaps, get them fixed as soon as possible to prevent moisture from getting in and causing condensation inside the glazed unit.
- Ventilation: Good ventilation in your home can reduce the likelihood of condensation forming on your windows. Make sure to use extractor fans in areas like the kitchen and bathroom, and try to keep your home at a consistent temperature to reduce the strain on your double-glazed windows.
- Avoid DIY Repairs: While it might be tempting to try and fix a misted-up window yourself, it’s usually best left to the professionals. DIY fixes often provide only a temporary solution and can end up costing more in the long run.
Do blown windows need replacing or can you repair double glazing?
If your double glazing has started to mist up, you might be wondering whether it’s better to repair or replace the unit. When a window is blown, the only proper option is to replace the glass unit. At Totalseal Repairs, we can help you avoid a full window replacement by simply replacing the sealed glass unit, which is often a more cost-effective solution. Trying to dry out the inside of the window is not a good idea and isn’t something we offer, as it doesn’t provide a lasting fix.
That being said, if your windows are quite old or if multiple units are failing, it might be more cost-effective in the long run to replace the whole window. Modern double glazing is more energy-efficient than older units, and upgrading to a new, energy-efficient option could also save you money on heating bills.
When to Call a Professional
If you’re dealing with misted double glazing, it’s always best to consult a professional. They can assess the condition of your windows and recommend the best course of action. At Totalseal Repairs, we specialise in fixing misted double glazing, and we can often replace just the sealed unit rather than the whole window, saving you time and money.
The sooner you deal with a misted window, the better. Leaving it too long can lead to further issues, including reduced energy efficiency and even damage to the window frame. If you’re unsure, give us a call—we’re always happy to offer advice and help you find the best solution for your home.
