Repair service
Misted Double Glazing in Newcastle: Cloudy Units Replaced
When condensation appears between the panes of a double glazed window, the sealed unit has failed. The glass looks permanently cloudy, the view is ruined and the window no longer insulates the room the way it should.
We replace misted and blown sealed units across Newcastle and the wider North East, keeping your existing frames in place. That means a repair measured in hours rather than a full window replacement measured in days, at a fraction of the cost. For seals, hinges, locks and other faults, see our double glazing repairs Newcastle page.
Guaranteed workmanship.
Repair first
15 minute replies
Working hours
Free in-person quotes
Fully insured
Guaranteed workmanship
Signs your sealed unit has failed
- Condensation or water droplets trapped between the panes
- A permanent cloudy or foggy patch that will not wipe away
- White chalky staining along the bottom of the glass
- Rooms feeling colder and draughtier near the window
- Rainbow style smears visible in bright sunlight
Why sealed units fail
Cracked or broken units, rather than cloudy ones, are covered on our sealed unit replacement page.
Every double glazed unit is built from two panes of glass separated by a spacer bar and filled with insulating gas. A perimeter seal holds that cavity airtight. Over the years, weather exposure, thermal movement and gradual frame settlement wear that seal down.
Once the seal is broken, moist air gets into the cavity and condenses on the inner faces of the glass. Nothing can be cleaned or dried out from inside or outside, because the moisture is sealed between the panes. Replacing the unit is the only genuine fix.
How we replace a failed unit
- We measure the failed unit and check the frame, beading and drainage
- We inspect and measure the unit before giving you a clear, free quotation
- New units are made to size in the correct thickness, gas fill and pattern
- We remove the old unit, clean out the rebate and renew the glazing packers
- The new unit is bedded, beaded and tested, and the old glass is taken away
Upgrade while the glass is out
A failed unit is a good moment to improve the glass rather than simply match it. We can fit low emissivity energy efficient glass to warm a cold room, toughened or laminated safety glass where building regulations require it, obscure patterns for bathrooms and side panels, or acoustic glass on a busy road.
We work on uPVC, timber and aluminium frames, and on windows, doors, side panels and conservatory roofs.
Confirming which part of the glazing has failed
The location of the cloudiness is important. Moisture trapped inside the cavity is not a mark that can be wiped from either exposed face. Droplets, a chalky deposit at the lower edge and smears seen in sunlight all belong to the sealed unit assessment. The frame may still be usable even though the view through the pane has deteriorated. That distinction is what allows the glass to be changed without treating the complete window as damaged.
Measurement is about more than the width of the visible pane. The replacement has to match the opening and the required unit thickness, with the appropriate pattern and gas fill. We also examine drainage and the beads holding the glass. When the old unit comes out, the rebate is cleaned and the packers renewed before the replacement is fitted. These steps belong to the glazing repair, while hinges and locks are checked for their own condition.
An enquiry can cover one cloudy unit or several affected openings. Say whether the glass is in a window, door, side panel or conservatory roof, and whether a decorative or obscure finish needs matching. If you want different glass, the existing options include low emissivity, acoustic and safety glazing. Choosing among these does not change the diagnosis: a failed cavity seal needs a replacement unit, not cleaning or venting.
Misted window repair: what actually fixes it
Steamed up double glazing that will not wipe clear has a failed seal. Searching for misted windows near me turns up a range of answers, but the lasting misted window repair is a new sealed unit in the existing frame. Our guide to condensation inside double glazing helps you check which side the moisture is on, and broken rather than cloudy units are covered by double glazing unit replacement. Prices are set out in our cost to replace a double glazed unit guide.
Related specialist repairs
Questions
Frequently asked
Do I need new windows if the glass is misted?
Almost never. If the frame, hinges and locks are sound, only the sealed glass unit needs replacing, which keeps the cost far lower than a new window.
How long does a replacement take?
Once the made to measure unit has arrived, most single units are swapped in well under an hour, and a full house of units is usually completed in one visit.
Can you match the glass in my other windows?
Usually, yes. We order the new unit in the thickness, pattern and finish that suits the frame, and we can upgrade to energy efficient or safety glass where it helps.
Can misted double glazing be repaired or does the unit need replacing?
Once moisture is inside the cavity the seal has failed, and the reliable fix is replacing the sealed unit. The frame and hardware are kept.
How much to replace misted double glazing?
It depends on the size, glass type and how many units are involved. See our cost to replace a double glazed unit guide for the existing price ranges.
Why are my windows misted on the outside?
Outside condensation is normal, especially on cool clear mornings with modern energy efficient glass. It shows the glass is keeping heat in, and it clears as the day warms up.
How do I fix misted windows?
Check where the moisture is. Room side condensation is a ventilation issue, outside condensation is harmless, and moisture between the panes needs a replacement sealed unit.
Can misted glass be drilled and dried out instead?
We do not recommend it. Drilling and venting a failed unit leaves the cavity open to the air, so the misting returns and the insulating gas is gone for good. Replacing the sealed unit is the only lasting fix.
Will one misted window mean the rest will fail too?
Not necessarily, although units fitted at the same time do tend to fail within a few years of each other. When we inspect one window we check the others and tell you honestly which look sound.
Do you have to take the frame out to replace the glass?
No. The glazing beads are removed, the failed unit lifts out and the new made to measure unit goes into the same frame, so your windows stay exactly where they are.
Read more
Guides that go with this repair
Discuss misted and failed units
Photo estimates sometimes possible.