Homes built in the 1970s and 1980s make up a huge proportion of properties across Sussex, Surrey and Kent — and many of them still have their original windows or early double glazing.
While these homes aren’t considered period properties, their windows are often now 40–50 years old, meaning performance can fall well short of modern standards.
Why Older Windows Struggle in 70s & 80s Homes
Early double glazing was a big step forward at the time, but technology has moved on significantly. Over the years, common issues include:
Failed window seals, allowing heat to escape
Condensation between panes, caused by broken units
Noticeable draughts, even when windows are closed
Increased outside noise
Higher heating bills, especially during winter
If you’re experiencing one or more of these issues, your windows may no longer be doing their job effectively.
How Modern uPVC Windows Improve Comfort
Modern uPVC double glazed windows are far more advanced than those installed decades ago. Today’s systems typically include:
Low-E glass to reflect heat back into your home
Improved spacer bars to reduce cold bridging
Advanced sealing systems to prevent draughts and leaks
Energy-efficient frames that won’t warp or rot
For homeowners in towns such as East Grinstead, Crawley, Horsham, Tunbridge Wells and surrounding areas, upgrading windows often leads to warmer rooms, quieter interiors and better energy efficiency almost immediately.
Is It Time to Replace Your Windows?
If your home still has its original 1970s or 1980s windows, replacement can be one of the most effective home improvements you make. Not only does it improve comfort and reduce heat loss, but it can also refresh the appearance of your property and add long-term value.
Local Window Replacement Experts You Can Trust.
At NatCon Windows, we specialise in replacing ageing windows in 1970s and 1980s homes across Sussex, Surrey and Kent. Our team offers honest advice, quality installations and modern window solutions designed to last.
👉 If you’re unsure whether your windows need replacing, get in touch for a friendly, no-pressure consultation.