Windows don't last forever. Most double-glazed units have a lifespan of 15–25 years — and once they start failing, the problems compound quickly. Here are five clear warning signs that it's time to consider new windows.

1. Misted or Condensation Between the Panes

If you can see misting or moisture trapped between the two panes of glass, the sealed unit has failed. The argon gas (or just air) that was providing insulation has escaped, and damp air has replaced it. Once the seal goes, the unit cannot be re-sealed — the glazed unit needs replacing. This is often repairable without replacing the whole frame.

2. Draughts Around the Frame

Hold your hand near the edge of a closed window on a windy day. If you can feel cold air coming in, the seals or gaskets have deteriorated. Over time, UPVC frames can also warp slightly, leaving gaps that let draughts in. This directly impacts your heating bills and comfort. New windows with modern weather sealing will make a noticeable difference.

3. Difficulty Opening, Closing or Locking

If your windows are stiff, drop on their hinges, or the handles don't operate smoothly, the friction hinges or locking mechanisms may have worn out. Sometimes these components can be replaced individually — but if the frame itself has warped, new windows may be the more cost-effective long-term solution.

4. Rising Energy Bills

Older single-glazed or early double-glazed windows have much higher U-values than modern units. If your heating bills have crept up, or certain rooms are always cold, your windows could be a significant factor. Modern triple-glazed UPVC windows achieve U-values as low as 0.8 W/m²K — dramatically reducing heat loss.

5. Excessive Outside Noise

Old or poorly sealed windows let in far more noise than modern units. Aluminium windows with specialist acoustic glazing can reduce noise by up to 45dB — a significant improvement if you live near a busy road or in an urban area.

What to Do Next

If you've noticed one or more of these signs, the first step is a survey. Our team will assess your existing windows, advise on whether repair or replacement makes more sense, and provide a clear, honest quote. Get in touch today — surveys are completely free and come with no obligation.