Misted Unit Replacement · County Antrim

Misted Unit Replacement in Belfast

Looking for misted unit replacement in Belfast? S&K Glazing has been installing across County Antrim for over a decade. Misted or 'blown' double glazing happens when the seal between the two panes fails, letting moisture into the sealed unit cavity. The trapped moisture condenses and looks like permanent fogging.

Local service: Belfast, County Antrim
Warranty: 10-year insurance-backed
Airport: Belfast International Airport (BFS)
Get a free quote Call 0800 088 6341

Why choose S&K for misted unit replacement in Belfast

  • Cost-effective — typically 70-80% cheaper than replacing the full window
  • Same-week service in most regions
  • Upgraded specification available — switch from old aluminium-spacer units to modern warm-edge units while you're at it
  • Acoustic and solar-control upgrades available for the same labour
  • Restores the original energy efficiency of your double glazing

About the service

Misted or 'blown' double glazing happens when the seal between the two panes fails, letting moisture into the sealed unit cavity. The trapped moisture condenses and looks like permanent fogging. The good news: in most cases you don't need to replace the whole window — just the failed sealed unit inside the existing frame. S&K Glazing replaces misted units across the UK, typically same week, often with no scaffolding required.

Misted Unit Replacement · Belfast

Working in Belfast

Belfast's Victorian and Edwardian terraces, the modern Cathedral Quarter regeneration, and the post-Troubles commercial expansion drive glazing demand across BT1-BT17. Heritage sash restoration, commercial shopfronts, and large-volume re-glazing on the urban estates all feature in our Northern Ireland workload.

For window-replacement work in Belfast, the property mix across Northern Ireland ranges from period stock through to modern new-build, so we specify the thermal solution per property — A++ rated double-glazed sealed units for standard upgrades (U-value 1.4 W/m²K), A-rated solar-control glazing for south-facing elevations, and triple-glazed argon-filled builds achieving 0.8 W/m²K for owners targeting near-Passivhaus performance. Most commonly we're working across BT1 and BT17 postcodes.

Our process

How we deliver in Belfast

01

Free measure-up

We visit, measure the failed unit, identify the glass thickness and any obscure pattern, and quote a fixed price.

02

Manufacture

Standard clear units: 3-5 working days. Obscure or patterned glass: 5-10 days.

03

Same-day swap

Most misted units are swapped in 20-30 minutes per window. A full house of 8-10 windows is typically completed in a single morning.

FAQs

Common questions

No — the condensation is between the panes inside a sealed cavity. Once the seal fails, the only permanent fix is unit replacement. Drilling and drying treatments are not durable solutions.
Usually no — if the frame is sound (which is normally the case unless it's 30+ years old) we replace only the sealed unit inside it.
Typical misted unit replacement: £80-£180 per window depending on size and glass spec. Compared to £400-£900 for full window replacement.

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Speak to our glazing team

Free survey, fixed-price quotes, no pressure sales. Call us, message on WhatsApp, or fill in the form — we typically respond within an hour during working days.

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Head office
Unit 1-4, Hembs Crescent, Great Barr
Birmingham B43 5DG

Misted Unit Replacement quote — Belfast

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