When to Repair vs When to Replace Your Double Glazing
Not all double glazing problems require a full window replacement. At Restoration Glazing, we assess every job honestly and recommend the most cost-effective solution — whether that's a straightforward sealed unit replacement or a complete new window.
Misted or foggy windows are the most common double glazing problem in Southampton. When the seal around a double glazed unit fails, moisture enters the gap between the panes, causing condensation you can't wipe away. In most cases, we can replace just the glass unit — keeping your existing frames — at a fraction of the cost of a full window replacement.
Repair Is Usually Best When:
- Sealed units are misted or foggy
- A single pane is cracked or broken
- Handles, hinges or locks have failed
- Rubber seals need replacing
- Frames are structurally sound
Replacement Is Better When:
- Frames are warped, cracked or rotten
- Windows are over 20 years old
- Multiple units have failed across the property
- You want to upgrade to A-rated energy efficient glass
- Security upgrades are needed
Typical Costs
Double glazing repair costs in Southampton depend on the type of work needed:
- • Misted sealed unit replacement: from £120 per unit
- • Broken glass replacement: from £80–£200 per pane
- • Handle or lock replacement: from £30–£60 per item
- • Full window replacement (supply & fit): from £350–£800 per window depending on size and specification
We always provide a free, no-obligation quote before any work begins. There's no separate call-out fee (every job has a £180 minimum charge) and no pressure to proceed.
Individual repairs are priced from £30 (misted units from £120). Every job has a £180 minimum charge.
Related Services
Areas We Cover
Frequently Asked Questions
Yes — in most cases we replace only the sealed glass unit, not the frame. This is far more cost-effective and typically takes 1–2 hours per window. Your existing uPVC or timber frames are retained.
Modern sealed units with Low-E glass and argon gas filling typically last 20–25 years. All our replacement units come with a 10-year guarantee against misting and seal failure.
If your frames are warped, cracked, or the windows are over 20 years old, full replacement is usually more cost-effective long-term. New A-rated windows also offer significantly better energy efficiency and security.
Yes. We provide free, no-obligation quotes for all double glazing repairs and replacements across Southampton and Hampshire. There is no separate call-out fee; every job has a £180 minimum charge.
