Misted, cloudy or foggy double glazing? WindowFix replaces failed sealed units across the North East – without replacing your frames. If condensation has appeared between the panes of your double glazing, the sealed unit has failed. We fix it quickly and affordably, keeping your existing frames.
No Call-Out Charge – No Fix No Fee – Free Estimates – Same-Day Service Where Possible
Get a free quote for your misted windows today.
Why Has My Double Glazing Misted Up?
Every double glazed unit is sealed around its edge and filled with air or gas. Over time that seal breaks down, letting moisture creep in between the panes. Once condensation forms inside the glass it cannot be wiped away or dried out – the unit itself has failed and needs replacing.
Misted units are not just unsightly. A failed unit has lost its insulating gas, so it lets more heat escape and your energy bills creep up.
Window Seal Gone? That’s What Causes Misting
If you’ve been told your “window seal has gone” or “the seals have failed”, it’s the same problem as misted double glazing. Each double glazed unit is two panes of glass with a sealed gap between them. When that seal breaks down, damp air gets in and condenses between the panes – that’s the misting, fogging or cloudy look you can’t wipe away.
A failed seal can’t be fixed on site – but you don’t need new windows either. We replace just the sealed glass unit in your existing frame, matched to the same size, style and finish, usually for a fraction of the cost of a new window.
Failed window seal? Call (0191) 5334433 for a free estimate – no call-out charge, no fix no fee.
Repair, Not Replacement
Window companies will often try to sell you complete new windows. In most cases that is unnecessary. We remove the failed sealed unit and fit a new A-rated glass unit into your existing uPVC, aluminium or timber frame – typically for a fraction of the cost of new windows.
We survey and measure on our first visit, and your replacement unit is normally manufactured and fitted within a week, or quicker for emergencies.
Before and After: Misted Units We’ve Replaced
These are real jobs, not stock photos. In each case we replaced only the failed sealed unit — the frames stayed exactly as they were, and each new unit took under 30 minutes to fit.
Signs Your Sealed Unit Has Failed
- Condensation, fog or a milky haze between the panes
- Water pooling inside the glass at the bottom of the unit
- A white, streaky residue etched on the inside of the glass
- Windows that feel noticeably colder than they used to
Why Choose WindowFix?
- No call-out charge – and no fix, no fee
- Fast local response – we cover the whole North East from our Houghton le Spring base
- 30+ years of experience – a family-run local firm, not a national call centre
- Fully insured – all work guaranteed
Frequently Asked Questions
Can misted double glazing be repaired without replacing the frame?
Yes. We replace only the failed sealed unit – the glass – leaving your existing uPVC, aluminium or timber frame in place. It is far cheaper than buying new windows.
How long does replacing a misted unit take?
We survey and measure first, then your replacement unit is normally manufactured and fitted within a week, or quicker for emergencies.
Why has my double glazing misted up?
The edge seal on the unit has failed, letting moisture in between the panes. Once condensation appears inside the glass the unit cannot be dried out and needs replacing.
Stop looking through foggy glass – call WindowFix for misted double glazing repair anywhere in the North East.
Related services: window hinge repairs, window lock repairs and uPVC door repairs.
Other Services We Offer
Misted Double Glazing Repair | uPVC & Door Repairs | Door Lock Repairs | Window Hinge Repairs | Window Lock Repairs | Emergency Boarding Up
Areas We Cover
Sunderland | Newcastle | Gateshead | Durham | Chester-le-Street | Washington
