Heritage
Preserve the original
Ideal for listed buildings where the original windows must be retained. The second frame sits inside, so the architectural character of the building is unchanged.
Granada secondary glazing · listed and period buildings
Keep the windows. Lose the draughts.
A discreet second window fitted inside your existing frames, so listed and period buildings keep their original windows and gain thermal and acoustic insulation.
Granada Secondary Glazing systemsFree surveyEst. 2003
When replacement is not an option
The heritage answer.
It is not always possible, or desirable, to replace or even repair existing frames. Secondary glazing adds a second window on the inside and leaves the original exactly as it is.
- Original windows kept in place, inside and out
- Suited to Grade I and II listed buildings
- Supplied by market leaders Granada Secondary Glazing
Why fit it
Quieter, warmer, unchanged.
Three reasons secondary glazing is chosen for buildings where the windows themselves cannot change.
Noise
A quieter room
A second pane and the air gap behind it significantly reduce external noise, creating a calmer, more comfortable space inside.
Thermal
Warmer, without draughts
Improves thermal insulation, cutting heat loss and energy bills while eliminating draughts.
Construction and fitting
Six systems, one discreet fit.
Every unit arrives fully assembled: an aluminium outer frame joined to a seasoned hardwood surround, for a neat, unobtrusive installation even in the most challenging openings.
- Face fixing for a simple installation
- Reveal fixing for recessed windows
- Coupled units for your largest openings
The six systems we fit
Horizontal slidersHinged unitsFixed and lift-out unitsVertical slidersBalance vertical slidersTilt-in balanced vertical sliders
Suitable for all premises
Homes, schools and hospitals.
The same hardwood sub-frames and scribing trims let us refurbish a single sash at home or a run of windows across a public building.
- Grade I and II listed buildings
- Schools and colleges
- Hospitals and healthcare facilities
- Universities
- Hotels and hospitality venues
- Commercial buildings and offices
How it works
Surveyed, made, fitted.
Secondary glazing is priced at your free survey, once we have seen the windows and the reveals they sit in.
- 01
Free survey
We visit, measure each window and talk through which Granada system suits the opening and how you use the room.
- 02
Made to measure
Your units are manufactured to size and supplied fully assembled, with the sub-frames and trims needed for your reveals.
- 03
Fitted inside
The new frame is fixed to the face or reveal of the existing window. The original stays untouched, inside and out.
Before you decide
Common questions.
What secondary glazing is, where it is used and the systems we can offer. Anything else, ask our office.
What is secondary glazing?
Secondary glazing involves adding an additional window panel inside your existing window frame. It preserves original windows while improving thermal efficiency and reducing noise.
Is secondary glazing suitable for listed buildings?
Yes, secondary glazing is ideal for Grade I and II listed buildings where original windows must be retained. Our Granada systems provide discreet installation that maintains architectural character.
What system options are available?
We offer horizontal sliders, hinged units, fixed and lift-out units, vertical sliders, balance vertical sliders, and tilt-in balanced vertical sliders to suit every application.
Instant online prices for glass and windows
Frames sound? Price the glass.
Secondary glazing is priced at your free survey. If your existing frames are fine and only the glass has failed, or you want complete new windows, you can see a fitted price on screen now, with fitting and VAT included.
Rather talk it through? 01296 630650
Glass only · keep your frames
Replace the misted glass.
New sealed units made to measure and fitted into the frames you already have.
Misted, cracked or blown. Frames fine.
Price my glass About two minutes
New windows · frames and glass
A whole new window.
A-rated Liniar frames in ten styles, with your choice of openers and glazing.
Draughty, dated or rotten frames.
Price my new windows Ten styles, priced instantly