Security secondary glazing in Gwynedd: what will it cost?
Budget £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window for security secondary glazing in Gwynedd, supplied and fitted. Larger panes, thicker makeups and difficult access cost more; the price is fixed in writing after the 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.
Specification at a glance
- Low-E glass for better insulation
- Suits sash, casement and arched openings
- Colour-matched frames to suit the room
- 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
Covering Gwynedd
We can arrange surveys and fitting anywhere in Gwynedd, including Bangor and Caernarfon. Dates depend on installer availability. Choose your town below for local details.
Gwynedd covers slate-built towns such as Bangor, Caernarfon and Porthmadog, Anglesey's Holyhead and Llangefni, and coastal holiday properties exposed to Irish Sea weather.
Typical settings for security secondary glazing:
- Listed homes and buildings in conservation areas
- Offices in historic buildings
- Period sash windows with original glass
- Homes on busy roads wanting noise reduction
Towns in Gwynedd
Getting the right glass for your building
How it opens
Match the opening style to the original window so both can be opened, cleaned and used for ventilation.
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 Wales
Planning permission
In Wales the local planning authority decides whether a new or altered shopfront needs planning permission. Replacing glass in an existing frame usually does not, because the outside of the building looks much the same. Bollards or barriers on the pavement need consent from the highway authority, normally the council.
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
- Tell us about the glazing
- Survey, measuring and frame check
- Written quote naming the glass
- Fitting and handover
Security secondary glazing in Gwynedd: questions
Which towns in Gwynedd do you cover?
We can arrange work anywhere in Gwynedd, including Bangor, Caernarfon, Holyhead and Pwllheli.
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.
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.
Other glazing in Gwynedd
- Security glass for home windows
- Security glazed doors and screens
- Counter and reception security screens
- Security window film
- Security glass for doors
- Misted unit replacement with laminated glass
Get a guide price now and book your free survey in Gwynedd.