Security double-glazed units in County Londonderry

How much should I budget for security double-glazed units in County Londonderry?

Guide prices for security double-glazed units in County Londonderry are £174 to £594 including VAT (£145 to £495 plus VAT) per unit for supply and fitting. We confirm a fixed price in writing after a free survey, before any glass is ordered.

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

24 mm, 28 mm and other overall thicknesses to suit frames
Laminated inner pane, outer pane or both
Made to measure for each sash, light and door panel
Obscure and decorative glass for bathrooms and doors
Low-E coating and argon fill for insulation
Warm-edge spacer bars in black, grey or white

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.

Common uses:

Replacing misted or damaged units
Ground-floor and basement windows
Windows in flats on walkways and balconies
Glazed back and side doors

Towns in County Londonderry

What to think about first

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.

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.

Consents and safety: Northern Ireland

Northern Ireland

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.

Replacing glass in an existing frame

Building regulations in Northern Ireland are administered by the eleven councils' building control services. Replacing only the glass in an existing frame is generally treated as a repair, while replacing whole windows or doors can be controlled work, so check with building control first. New glass in a critical location should be safety glass under Part V.

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 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.

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.

Which pane should be laminated?

Usually the inner pane, so smashing the outer pane does not create an opening. On doors and low panes the outer pane is normally toughened to meet safety rules.

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.

Other glazing in County Londonderry

Start with a guide price online, then we survey and fix the price in writing.