Window security grilles in Derry

Window security grilles in Derry: what will it cost?

Window security grilles in Derry typically cost £414 to £954 including VAT (£345 to £795 plus VAT) per window, supplied and fitted. Use the quote tool for a guide figure, then we survey and confirm a fixed price.

A window security grille is a steel barrier fitted across a window so that breaking the glass no longer gives a way in. It can be retractable, fixed or removable, and is most often fitted inside the reveal where it is protected and barely noticed from outside.

Options for window security grilles in Derry

Made to measure for the reveal, including bays and splayed reveals
Powder-coated in white, black or anthracite to sit with the frame colour
Works with uPVC, aluminium, timber and steel windows
Fitted inside the glass by default; external options for recessed or plain openings
Quick-release escape handle for bedroom and upstairs windows
Anti-tamper fixings into masonry or a fabricated subframe

Fitting in Derry and nearby

We can arrange window security grilles across Derry, the main centre for County Londonderry, and in nearby towns including Strabane, Limavady and Coleraine.

County Londonderry centres on Derry's walled city and Victorian streets, with Coleraine and Limavady further east.

Common openings for window security grilles:

Rear windows facing alleys and gardens
Offices and shops with side or rear windows
Flats with windows onto shared walkways
Outbuildings, workshops and garages with glazing

Getting the right window grille for your building

Escape requirements

If the window is a designated escape window, the grille must open from inside without a key or tool. We fit quick-release locks for these.

Depth in the reveal

Tracks need a few centimetres of flat reveal. Where the frame sits flush with the wall, the grille can be fixed to a slim subframe instead.

What the rules say in Northern Ireland

Northern Ireland

Listed buildings and conservation areas

Listed buildings in Northern Ireland need listed building consent for works affecting their character, with the council deciding and the Department for Communities' Historic Environment Division advising. Conservation areas bring extra scrutiny of external changes.

Bedroom and escape windows

Fire safety in new building work in Northern Ireland is covered by the Building Regulations (Northern Ireland) 2012 and Technical Booklet E. Where a room relies on a window for escape, nothing fitted over it should stop it being used. We only fit grilles over escape windows with a keyless internal release.

How it works

Guide price online or by phone
Survey in Derry
Accept the fixed quote
Installation by installers working under our contract

Window security grilles in Derry: questions

Which areas near Derry do you cover?

We can arrange work in Derry and in nearby Strabane (13 miles), Limavady (15 miles) and Coleraine (27 miles). Dates depend on installer availability.

Are window grilles safe in a bedroom?

They can be, provided the grille has a release that opens from inside without a key. Bedroom and upstairs windows often have to serve as escape routes, so we will not fit a key-only grille over a window you need for escape.

Will a grille damage my window frame?

No. Grilles fix to the wall reveal or a subframe, not to the window itself, so the frame and its warranty are unaffected.

Can I still open the window with a grille fitted?

With a retractable or removable grille, yes. Many fixed internal grilles also leave room to open the sash or casement behind them.

Window security grilles in nearby towns

Other grilles in Derry

Tell us about your window grille and we will come back with a guide price.