Security secondary glazing in Northolt

Security secondary glazing in Northolt: what will it cost?

Typical prices for security secondary glazing in Northolt are £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window, supplied and fitted. Use the quote tool for a guide figure, then we survey and confirm a fixed price.

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.

Specification at a glance

Noise and draught reduction
Laminated glass in slim aluminium frames
Locks and catches that open from inside without a key
Vertical sliding, horizontal sliding, hinged and lift-out styles
Low-E glass for better insulation
Fixed within the reveal, leaving the original window untouched

Fitting in Northolt and nearby

Whether you are in central Northolt or at the edge of the UB5 district, we can arrange a survey. Nearby Greenford and Harrow are covered too.

Greater London has every kind of glazing, from Georgian sashes and Victorian bays in conservation areas to high-street shopfronts, office curtain walling and new-build flats.

Typical settings for security secondary glazing:

Listed homes and buildings in conservation areas
Ground-floor flats in converted townhouses
Homes on busy roads wanting noise reduction
Offices in historic buildings

Getting the right glass for your building

Escape and ventilation

On windows used for escape, the secondary glazing must open quickly from inside without a key or tool.

Listed building consent

Internal secondary glazing is usually seen as reversible, but consent can still be needed. Check with the conservation officer first.

What the rules say in England

England

Listed buildings and conservation areas

In England, listed building consent from the council may be needed to replace historic glass such as crown or cylinder glass, or to alter glazing bars, sashes and frames. Historic England publishes guidance on traditional windows. Secondary glazing and window film are often easier to agree because they can be removed later, but the council's conservation officer makes the decision.

Windows needed for escape

Approved Document B expects many habitable rooms in houses, particularly upstairs, to have an escape window with a clear opening of at least 0.33 m², at least 450 mm high and 450 mm wide, with the bottom of the opening no more than 1,100 mm above the floor. Changing the glass does not alter that, but locks, secondary glazing and film must not stop the window opening. Laminated glass is hard to break through, so escape always relies on the window opening.

How it works

Tell us about the glazing
Survey, measuring and frame check
Written quote naming the glass
Fitting and handover

Security secondary glazing in Northolt: questions

Do you cover Greenford as well as Northolt?

Yes. As well as Northolt, we can arrange surveys in nearby Greenford, Harrow and Southall. Dates depend on installer availability.

Do I need permission for secondary glazing in a listed building?

It depends on the building and the council. Internal secondary glazing usually has less impact than replacement windows, but listed building consent may still be needed. Ask the conservation officer before ordering.

Can I still open my sash windows?

Yes. Secondary glazing slides, hinges or lifts out so the original window can be opened and cleaned.

Does secondary glazing reduce noise?

Yes, often noticeably, because of the air gap between the two panes. Laminated glass helps further.

Security secondary glazing in nearby towns

Other glazing in Northolt

Get a guide price now and book your free survey in Northolt.