Old Double Glazing vs New: Spotting When It’s Time for an Upgrade in Leicestershire
Windows are one of those things we don’t think about much until something goes wrong. They keep the cold out, the noise down, and let the light in. But over time, they wear out just like anything else.
If you’ve got double glazing that’s seen better days, figuring out how old it is can be a real headache. Most houses built or updated since the ’70s have it, but figuring out if yours is past its best isn’t always straightforward, especially if you’ve just moved in or lost the paperwork.
At Phair Windows, we’ve been helping Leicestershire families sort out their windows since 1998, and we’ve seen it all. From 1970s originals still hanging in there to shiny new installs that transform a home.
In this guide, we’ll walk you through how to check the age of your double glazing and the telltale signs it’s time for new ones.
What Exactly Is Double Glazing?
Let’s start with the basics. Double glazing, or double-glazed windows, is two sheets of glass with a gap between them, usually filled with air or argon gas for insulation.
It became standard in UK homes from the 1970s onwards, replacing draughty single panes. The idea is simple: that gap traps heat inside during winter, blocks noise from the street, and makes your home cosier overall.
But double glazing is not invincible. Seals break down, gas escapes, and frames warp after 20-30 years. We’ve replaced plenty where the performance has dropped right off, leaving homeowners with foggy glass or skyrocketing bills.
Modern double glazing is miles better, with low-E coatings, triple glazing options, and tougher frames that can last decades longer.
How Old is My Double Glazing?
If you’ve recently moved into a new property or can’t recall the last time you replaced your double glazing, the easiest way to determine its age is by visiting the FENSA website. Your window installation contractor should have registered the certification if the windows were fitted after April 2002.
FENSA is a national scheme designed to ensure that window companies are installing windows that meet the minimum building regulation requirements and are issued with a certificate to confirm this.
However, if your windows were not fitted by a registered FENSA company, or it was a DIY job, then the windows should have had full local authority Building Control Approval.
Other Quick Ways to Date Your Windows
- Spacer Bar Etching – Peer at the edge of the glass for a tiny date stamp on the metal bar between panes, which often includes maker details too.
- Frame Clues – Look for yellowed spacers, shrunk seals, or old-style single seals (pre-2000s lacked modern argon gas). uPVC from the ’80s/90s might be brittle now.
Older Double Glazing (Prior 2002)
If your windows don’t show up through the FENSA scheme or Building Control Approval, chances are that they were installed prior to 2002. uPVC windows can last for 20 or even 30 years, depending on a variety of factors.
If you’re unsure whether your windows need replacing, there are signs that can help you determine the age of your double glazing.
9 Telltale Signs It’s Time for New Windows
If you don’t have any documents, other signs can still help you estimate the age of your double glazing and know when it’s time to replace your windows.
Look out for these common red flags we’ve seen in homes across Leicestershire.
If you’re ticking off more than a couple, it’s probably time for new windows.
1. Increased Energy Bills
If you notice a significant increase in your energy bills, it could be due to the inefficiency of your windows. Old windows often lack proper insulation, leading to heat loss during winter and heat gain during summer.
Replacing them with newer, more efficient models can help you save on heating and cooling costs in the long run.
2. Condensation and Moisture
Condensation and moisture between the glass panes are common problems with older double glazing that has deteriorated over time.
If you notice foggy or misty windows, it’s a strong indication that the seals have failed and replacement is necessary. Excessive condensation on your windows can indicate poor insulation and can lead to mould growth and damage to the surrounding walls.
3. Draughts and Temperature Fluctuations
If you feel draughts around your windows or notice air leakage even when they are closed, it’s a clear indication that your windows are no longer providing an effective seal. Upgrading to new windows can provide better temperature regulation.
4. UV Damage to Furniture and Flooring
Older windows may lack effective UV protection, causing the sun’s rays to damage your furniture, flooring, and other interior elements.
If you notice fading or discolouration, it’s time to consider replacing your windows with UV-resistant glazing to preserve your belongings.
5. Difficulty Opening, Closing, or Locking Windows
Over time, wear and tear can affect the functionality of your windows. If you’re struggling with opening, closing, or locking them, your windows may have faulty mechanisms or damaged frames, which pose a potential security risk.
Installing new windows with smoother operation and robust locking mechanisms will enhance both safety and convenience.
6. Visual Wear and Tear
Cracked glass, rotting frames, or peeling paint are signs of significant window damage. These issues not only affect the look but also compromise the functionality of the windows.
7. Increased Noise Pollution
If you find that outside noise easily enters your home, it’s a sign that your windows are not soundproof. Upgrading to newer windows can significantly reduce noise infiltration.
8. Outdated Appearance
Old, worn-out windows can significantly detract from the overall aesthetic appeal of your home. By replacing them with modern designs, you can elevate the appearance of your property and potentially increase its value.
9. Enhanced Security
Modern windows come with advanced security features that offer greater protection against unwanted intruders. If your current windows lack these essential security enhancements, it’s wise to invest in replacement windows that prioritise the safety of your home.
Looking For a Quote?
If you spotted a few signs that it’s time to replace your windows, get in touch with the team at Phair Windows. We’re a leading, family-run window and door company improving homes across Leicestershire and the East Midlands.
For a free, no-obligation quote from our expert team, get in touch today!
Related Articles:
- How Long Does Double Glazing Last?
- How Long Do uPVC Windows Last?
- Will New Double Glazed Windows Save Energy?
- 5 Causes & Signs of Double Glazing Failure
- How Effective is Double Glazing at Reducing Noise?
- How to Fix Blown Double Glazing & Clear Misted Windows
- Cost of Double Glazing a 3 Bed House UK
FAQs
To date double-glazed windows, you can check the FENSA website. If the windows were installed after April 2002, the contractor should have registered them, allowing you to find information about their age and installation details.
Double glazing has been around since the 1970s and is a common feature in most homes nowadays, except for older properties. It provides better insulation by having two glass panes with a gap in between, reducing heat loss and improving energy efficiency.
The difference between old and new double-glazed windows lies in their effectiveness and features. Old double-glazed windows may lose efficiency over time due to wear and tear, while new ones incorporate advanced technology for better insulation, durability, and energy efficiency.
While it is possible to replace windows yourself, it is recommended to hire a professional for the best results. Professional window installers have the expertise and tools to ensure proper installation, which is crucial for optimal performance and energy efficiency.
The lifespan of windows can vary depending on various factors such as the quality of the windows, climate conditions, and maintenance. On average, windows may need replacement every 20 to 25 years, but signs of deterioration should be monitored to determine the appropriate timing.
To determine the age of your windows, you can visit the FENSA website. If your windows were installed after April 2002, the contractor should have registered the window certification, making it easier to find out their age and related information.
Yes, investing in new windows is worth the cost. The energy savings, improved comfort, enhanced aesthetics, and increased property value make it a valuable home improvement project in the long run.
The choice of window frame material depends on your preferences, budget, and climate. Common options include uPVC, aluminium, and timber. Each material has its advantages and considerations, so it’s best to consult with professional window fitters to determine the most suitable choice.
