What should security secondary glazing cost in South Glamorgan?
Guide prices for security secondary glazing in South Glamorgan are £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window for supply and fitting. We confirm a fixed price in writing after a free survey, before any glass is ordered.
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
- Laminated glass in slim aluminium frames
- Locks and catches that open from inside without a key
- Colour-matched frames to suit the room
- Low-E glass for better insulation
- Fixed within the reveal, leaving the original window untouched
- Suits sash, casement and arched openings
Covering South Glamorgan
We can arrange surveys and fitting anywhere in South Glamorgan, including Cardiff and Barry. Dates depend on installer availability. Choose your town below for local details.
South Glamorgan covers Cardiff's city-centre arcades, offices and Bay waterfront, Victorian terraces in Canton and Roath, and the coastal towns of Barry and Penarth.
Good candidates for security secondary glazing:
- Homes on busy roads wanting noise reduction
- Ground-floor flats in converted townhouses
- Offices in historic buildings
- Period sash windows with original glass
Towns in South Glamorgan
Before the glass is ordered
Frame colour and sightlines
Slim frames that line up with the existing meeting rails make the secondary glazing almost invisible from outside.
How it opens
Match the opening style to the original window so both can be opened, cleaned and used for ventilation.
Glazing rules in Wales
Windows needed for escape
Approved Document B for Wales sets out escape window provisions for homes broadly in line with England's, including minimum clear opening sizes and a maximum sill height. New glass does not change those, but locks, secondary glazing and film must leave an escape window able to open. Laminated glass is not designed to be broken out.
Replacing glass in an existing frame
Welsh Government guidance says building regulations have applied to replacement glazing since 1 April 2002, which covers replacing windows and doors. Swapping only the glass or a sealed unit in an existing frame is generally treated as a repair. New glass in a critical location should still be safety glass, and the council's building control team can confirm anything unclear.
How it works
- Send sizes or use the quote tool
- Free survey at your South Glamorgan address
- Fixed price in writing
- Glass made, then fitted
Security secondary glazing in South Glamorgan: questions
Which towns in South Glamorgan do you cover?
We can arrange work anywhere in South Glamorgan, including Cardiff, Barry, Penarth and Llantwit Major.
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.
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.
Can I still open my sash windows?
Yes. Secondary glazing slides, hinges or lifts out so the original window can be opened and cleaned.
Other glazing in South Glamorgan
- Display case security glass
- Anti-bandit glass
- Misted unit replacement with laminated glass
- Broken glass replacement
- Kiosk and booth security glazing
- Laminated roof and conservatory glass
Ready for a price? Use the form or call 0800 088 6248.