Looking for misted unit replacement in Londonderry? S&K Glazing has been installing across County Londonderry 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.
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.
Londonderry's 17th-century walled city, Georgian Bishop Street, and Victorian Waterside generate heritage-led glazing demand across BT47-BT48. Listed-building consents and timber sash restoration form the bulk of our work in this Northern Ireland walled city.
For window-replacement work in Londonderry, 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 BT47 and BT48 postcodes.
We visit, measure the failed unit, identify the glass thickness and any obscure pattern, and quote a fixed price.
Standard clear units: 3-5 working days. Obscure or patterned glass: 5-10 days.
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.
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.
Local survey, fixed-price quote, no obligation.
