Security secondary glazing in Isleworth

How much should I budget for security secondary glazing in Isleworth?

As a guide, allow £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window for security secondary glazing in Isleworth, supplied and fitted. Size, glass makeup, access and frame condition move the price, which is confirmed in writing after the free survey.

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

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

Fitting in Isleworth and nearby

Surveys in Isleworth (TW7) are booked around installer availability. We also cover nearby Hounslow (1 mile), Heston (2 miles) and Richmond (2 miles).

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.

Common uses:

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

What to think about first

Escape and ventilation

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

Frame colour and sightlines

Slim frames that line up with the existing meeting rails make the secondary glazing almost invisible from outside.

Consents and safety: 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

Guide price online or by phone
Survey in Isleworth
Accept the fixed quote
Fitted by glaziers working under our contract

Security secondary glazing in Isleworth: questions

Can you survey in Isleworth and nearby towns?

Yes. Surveys in Isleworth, Hounslow and Heston are booked around 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.

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.

Security secondary glazing in nearby towns

Other glazing in Isleworth

Tell us about the glazing and we will come back with a guide price.