As winter settles in across Dorset, your home’s windows are put to the test. Cold weather, condensation, and temperature changes can expose hidden problems with your glazing. If you’ve started noticing draughts, misted panes or rising energy bills, it might be time to take a closer look.
At Dolphin Glass, we believe in honest advice and repair-first solutions. But in some cases, a full double glazing installation is the most cost-effective, long-term fix. So how do you know when your double glazing needs replacing?
Here are the key signs to watch for.
1. Condensation Between the Panes
This is one of the most common issues we’re called out for. If you see condensation inside the double glazing unit (not on the interior or exterior surface), it means the seal has failed. When this happens, moisture enters the space between the panes, reducing insulation and visibility.
While a window repair can sometimes resolve the issue, a blown unit often needs to be replaced, and we can do just that without replacing the entire window frame.
2. Draughts and Cold Spots
Do you feel cold air around your windows even when they’re closed? It could be a sign of warped frames, deteriorated seals, or failed glazing. These draughts not only make your home uncomfortable but increase heating costs. If repairs aren’t enough, double glazing installation can solve the problem and significantly boost energy efficiency.
3. Difficulty Opening or Closing Windows
If your windows have become stiff, jammed, or don’t shut properly, it could be due to hinge issues or frame movement over time. This can affect your home’s security and insulation. Depending on the cause, we’ll assess whether a simple window repair is suitable or if full window and door restoration is needed.
4. Rising Energy Bills
If your heating costs are creeping up despite your thermostat settings, poor window performance may be to blame. Older or damaged double glazing lets valuable heat escape. New, energy-efficient glazing helps keep your home warmer for longer, and saves money over time.
5. Visible Damage or Wear
Cracked glass, chipped frames, or rusted hardware all affect the performance and safety of your windows. These signs of age can often be repaired, but if multiple issues are present, replacement might be the smarter investment, particularly if your glazing is over 15–20 years old.
At Dolphin Glass, we’ve been working with homeowners across Bournemouth, Christchurch, Poole, and beyond for decades. We’re happy to assess your windows, explain your options, and recommend a full replacement only when absolutely necessary.
Whether it’s window repair, window and door restoration, or full double glazing installation, we deliver honest service, competitive prices, and expert workmanship.
