Security secondary glazing in Finchley: what will it cost?
As a guide, allow £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window for security secondary glazing in Finchley, 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.
Choices you can make
- Noise and draught reduction
- Locks and catches that open from inside without a key
- Laminated glass in slim aluminium frames
- Vertical sliding, horizontal sliding, hinged and lift-out styles
- Fixed within the reveal, leaving the original window untouched
- Suits sash, casement and arched openings
Fitting in Finchley and nearby
We can arrange security secondary glazing anywhere in Finchley, and in nearby Muswell Hill, Cricklewood and Kilburn. Tell us your postcode and we will offer dates.
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:
- Ground-floor flats in converted townhouses
- Offices in historic buildings
- Period sash windows with original glass
- Homes on busy roads wanting noise reduction
Getting the right glass for your building
Listed building consent
Internal secondary glazing is usually seen as reversible, but consent can still be needed. Check with the conservation officer first.
Escape and ventilation
On windows used for escape, the secondary glazing must open quickly from inside without a key or tool.
What the rules say in England
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.
Planning permission
Changing the glass in an existing window or shopfront does not usually need planning permission, because the building looks much the same afterwards. A new or altered shopfront, or security features added to the outside of a building, may need planning permission from the council. Bollards or barriers on the pavement need the highway authority's consent, which is normally the council.
How it works
- Send sizes or use the quote tool
- Free survey at your Finchley address
- Fixed price in writing
- Glass made, then fitted
Security secondary glazing in Finchley: questions
Which areas near Finchley do you cover?
We can arrange work in Finchley and in nearby Muswell Hill (2 miles), Cricklewood (3 miles) and Kilburn (3 miles). Dates depend on installer availability.
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.
Does secondary glazing reduce noise?
Yes, often noticeably, because of the air gap between the two panes. Laminated glass helps further.
Can I still open my sash windows?
Yes. Secondary glazing slides, hinges or lifts out so the original window can be opened and cleaned.
Security secondary glazing in nearby towns
Other glazing in Finchley
- Blast-resistant glazing
- Patio and bifold door security glass
- Anti-bandit glass
- Bullet-resistant glass
- Security window film
- Display case security glass
Ready for a price? Use the form or call 0800 088 6248.