What should security double-glazed units cost in Derry?
Our guide range for security double-glazed units in Derry is £174 to £594 including VAT (£145 to £495 plus VAT) per unit, including fitting. The survey is free for new installations and your fixed price follows in writing.
A security double-glazed unit is a sealed unit in which one or both panes are laminated glass, usually the inner pane, so the window keeps its insulation but resists being broken through. It fits the same frame as a standard unit and is the simplest way to add security to modern windows and doors.
Glass and fitting options
- Low-E coating and argon fill for insulation
- Warm-edge spacer bars in black, grey or white
- Toughened outer pane where safety glass is required
- 24 mm, 28 mm and other overall thicknesses to suit frames
- Laminated inner pane, outer pane or both
- Obscure and decorative glass for bathrooms and doors
Fitting in Derry and nearby
We can arrange security double-glazed units anywhere in Derry (BT48). Dates depend on installer availability.
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.
Good candidates for security double-glazed units:
- Windows in flats on walkways and balconies
- Replacing misted or damaged units
- Patio doors and bifolds
- Glazed back and side doors
Before the glass is ordered
Energy performance
Choosing low-E glass, argon and warm-edge spacers keeps the window as efficient as possible, often better than the unit being replaced.
Overall thickness
The new unit must suit the frame's glazing rebate. If your frames only take thin units, we use thinner laminates or adjust the beads.
Glazing rules in Northern Ireland
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.
Security rules for new homes
If you are building a new home in Northern Ireland, ask the council's building control service which security requirements apply. In existing homes nothing obliges you to upgrade glass, but laminated glass to BS EN 356 P1A in doors and in windows beside them is a common benchmark taken from guidance in Great Britain.
How it works
- Postcode and a few photos
- On-site survey
- Fixed written price and lead time
- Fit, check and explain
Security double-glazed units in Derry: questions
Do you cover Strabane as well as Derry?
Yes. As well as Derry, we can arrange work in nearby Strabane. Dates depend on installer availability.
Will a laminated unit be heavier?
A little. A laminated pane weighs about the same as a solid sheet of the same thickness. On large opening sashes we check hinges and friction stays.
Can I just replace the glass and keep my frames?
Yes, if the frames are sound. We measure each unit, make security units to the same size and fit them into your existing frames.
How long do new units take?
Units are made to order after the survey. Lead times vary with glass type and size, and we confirm them when we quote.
Security double-glazed units in nearby towns
Other glazing in Derry
- Security glass for home windows
- Security glazed doors and screens
- Counter and reception security screens
- Broken glass replacement
- Safety glazing for schools and public buildings
- Anti-ram-raid glazing
Start with a guide price online, then we survey and fix the price in writing.