How much does security secondary glazing cost in County Londonderry?
Guide prices for security secondary glazing in County Londonderry are £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window for supply and fitting. We confirm a fixed price in writing after a free survey, before any glass is ordered.
Security secondary glazing is a separate slim window fitted on the room side of an existing window, glazed with laminated glass so it forms a second barrier. It leaves the original window untouched outside, which makes it a common choice for listed buildings, conservation areas and period sash windows.
What goes into security secondary glazing
- Colour-matched frames to suit the room
- Laminated glass in slim aluminium frames
- Suits sash, casement and arched openings
- Vertical sliding, horizontal sliding, hinged and lift-out styles
- Noise and draught reduction
- Fixed within the reveal, leaving the original window untouched
Covering County Londonderry
We can arrange surveys and fitting anywhere in County Londonderry, including Coleraine and Derry. Dates depend on installer availability. Choose your town below for local details.
Londonderry's listed walled city and riverside offices, Coleraine's university-town centre and the north coast at Portstewart sit alongside the market towns of Magherafelt and Limavady.
Typical places for security secondary glazing:
- Listed homes and buildings in conservation areas
- Period sash windows with original glass
- Offices in historic buildings
- Homes on busy roads wanting noise reduction
Towns in County Londonderry
Things to decide before you order
How it opens
Match the opening style to the original window so both can be opened, cleaned and used for ventilation.
Frame colour and sightlines
Slim frames that line up with the existing meeting rails make the secondary glazing almost invisible from outside.
Rules that apply in Northern Ireland
Planning permission
Planning in Northern Ireland is handled by the eleven councils, which decide whether a new or altered shopfront needs permission; changing the glass in an existing frame usually does not. Bollards or barriers on a public footway need consent from the Department for Infrastructure's roads service.
Listed buildings and conservation areas
Listed buildings in Northern Ireland need listed building consent from the council for works affecting their character, which can include historic glass and sash windows. The Department for Communities' Historic Environment Division advises on these cases. Conservation areas bring extra scrutiny of shopfronts and external changes.
How it works
- Guide price online or by phone
- Survey in County Londonderry
- Accept the fixed quote
- Fitted by glaziers working under our contract
Security secondary glazing in County Londonderry: questions
Which towns in County Londonderry do you cover?
We can arrange work anywhere in County Londonderry, including Coleraine, Derry, Limavady and Magherafelt.
Is secondary glazing safe for escape windows?
It can be, as long as it opens quickly from inside without a key. We design catches and handles for that.
Will secondary glazing cause condensation?
A well-fitted unit usually reduces condensation on the inner pane. Some ventilation of the gap may be needed, which we discuss at the survey.
Does secondary glazing reduce noise?
Yes, often noticeably, because of the air gap between the two panes. Laminated glass helps further.
Other glazing in County Londonderry
- Laminated glass retrofit
- Kiosk and booth security glazing
- Security double-glazed units
- Misted unit replacement with laminated glass
- Laminated security glass
- Broken glass replacement
Tell us about the glazing and we will come back with a guide price.