Security secondary glazing in Dartford: what will it cost?
Our guide range for security secondary glazing in Dartford is £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window, including fitting. The survey is free for new installations and your fixed price follows in writing.
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
- Vertical sliding, horizontal sliding, hinged and lift-out styles
- Laminated glass in slim aluminium frames
- Suits sash, casement and arched openings
- Fixed within the reveal, leaving the original window untouched
- Locks and catches that open from inside without a key
- Colour-matched frames to suit the room
Fitting in Dartford and nearby
Surveys in Dartford (DA1) are booked around installer availability. We also cover nearby Bexley (3 miles), Swanley (4 miles) and Welling (5 miles).
Kent ranges from Canterbury's listed city centre and the Regency fronts of Tunbridge Wells to the Medway towns, Ashford's growth estates and coastal Margate and Folkestone.
Typical settings for security secondary glazing:
- Listed homes and buildings in conservation areas
- Period sash windows with original glass
- Ground-floor flats in converted townhouses
- 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
Replacing glass in an existing frame
Replacing only the glass or sealed unit in an existing frame is generally treated as a repair in England rather than notifiable building work. Replacing a whole window or door is notifiable and is normally certified through a competent person scheme or approved by building control. Either way, new glass in a critical location should still be safety glass.
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
- Send sizes or use the quote tool
- Free survey at your Dartford address
- Fixed price in writing
- Glass made, then fitted
Security secondary glazing in Dartford: questions
Can you survey in Dartford and nearby towns?
Yes. Surveys in Dartford, Bexley and Swanley are booked around installer availability.
Is secondary glazing safe for escape windows?
It can be, as long as it opens quickly from inside without a key. We design catches and handles for that.
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 Dartford
- Laminated security glass
- Commercial reglazing
- Counter and reception security screens
- Security double-glazed units
- Kiosk and booth security glazing
- Bullet-resistant glass
Ready for a price? Use the form or call 0800 088 6248.