Centre keeps locking
Both sashes lock independently to the frame at multiple points, with the meeting stile incorporating shootbolt locking to prevent forced separation.
Windows
French Casement Windows
Two sashes open from the centre for a wider clear opening and less frame in the view.
- 70mm multi-chamber frame
- Up to A+14 rated
- U-value 1.3 W/m²K (double) or 0.9 W/m²K (triple)
- Full 90° opening, no central bar
10YEARGUARANTEE
Assure certifiedSurveyed properlyFinance availablePersonalise Your Window
Colours & Finishes
Frame colour: Smooth White
Standard colours
Extended lead time colours
Dual colour may be available, with different interior and exterior frame finishes depending on the range.
Handle and hinge finish: White
French casements need the handle, hinge, and meeting-stile detail to feel deliberate, especially because both sashes open from the centre with no fixed mullion.
Made to measure. We confirm the colour, glazing, handle finish, and opening layout during your survey.
Handle and hinge finish: White
French casements need the handle, hinge, and meeting-stile detail to feel deliberate, especially because both sashes open from the centre with no fixed mullion.
Made to measure. We confirm the colour, glazing, handle finish, and opening layout during your survey.
Product fit
Best when the opening and view matter more than a centre bar
French casements are chosen when both sashes need to open away from the middle, leaving a clearer opening than a standard casement pair. They work well on garden-facing rooms, bedroom escape routes, and elevations where the central upright would otherwise interrupt the view.
Best fit for
- Rooms where a wider clear opening is useful
- Garden-facing windows where the view should feel less divided
- Openings that need ventilation without changing to a different window style
Consider another option when
- There is not enough outside clearance for both sashes to open comfortably
- The house needs vertical sash proportions or stronger period detailing
- A single opener, tilt-and-turn function, or simpler casement layout would be more practical
What we check on survey
- We check whether the opening needs a fire-escape hinge or restrictor.
- We confirm sash width so the pair opens cleanly without catching outside features.
- We match bar layouts and sightlines to neighbouring windows where needed.
Useful comparisons
Casement windowsCompare the practical default for most full-house UPVC replacements.Flush sash windowsCompare a flatter timber-look casement for visible elevations.Sliding sash windowsCompare the vertical sash route for Victorian, Edwardian, and bay-fronted homes.Sash horn windowsCompare traditional horn detailing without always choosing a true sliding sash.Tilt and turn windowsCompare inward-opening windows for cleaning access and secure ventilation.Aluminium casementsCompare the slimmer aluminium frame route for modern elevations and larger openings.Aluminium tilt and turnCompare aluminium sightlines with inward cleaning and secure tilt ventilation.
Optional Upgrade
Cleaner shading for wider-opening casements
French casement windows are often chosen because the opening and view matter. Integral blinds can keep that view controlled without adding loose blinds across the centre opening, especially on garden-facing bedrooms, kitchens, and overlooked rooms.
Clear opening, discreet shading
A between-glass blind option for rooms where the open view and privacy both matter.
Useful on French casements when
- The wider opening faces a neighbour, garden boundary, or street
- You want privacy without covering the centre-opening frame detail
- Curtains would restrict how the paired sashes open day to day
Blind types we can discuss
Magnetic integral blinds
A slim magnetic slider raises, lowers, and tilts the blind inside the sealed glass unit.
Electric integral blinds
Remote operation suits larger panes, harder-to-reach glass, and cleaner contemporary rooms.
What we check
- Glass unit size and cavity depth
- Handle position, reveal depth, and room layout
- Whether magnetic or electric operation is worth pricing
We check sash size, handle position, hinge clearance, and whether the blind route suits the way both sashes open.
Ask about French casement blind upgradesFree Survey
Ready to shortlist this product properly?
If this looks like the right fit, we can survey the opening, confirm the specification, and price it properly for your home with no obligation.
Free surveyFixed quoteDirect Cii installation team
French casement windows open both sashes outward from the centre, eliminating the central vertical mullion that would otherwise divide the opening. The result is an uninterrupted view, a wider opening, and the maximum connection between your room and the outside. Cii Double Glazing supplies and installs French casement windows across Romford and Essex using 70mm EnergyPlus profiles, achieving A+ energy ratings with U-values from 1.3 W/m²K with double glazing, or 0.9 W/m²K with triple glazing. Survey, specification, and sign-off are handled clearly from the start.
Key Specifications
10-year profile guarantee. No warping, splitting, or discolouration
10-year mechanical guarantee on all locking hardware
£7,500 break-in protection promise
Independent master and slave sash locking
Optional fire egress hinge for Building Regulations compliance
100% lead-free, recyclable uPVC. BSI Kitemark certified
Engineering Detail
What makes our French casements different
Easy-clean hinge system
The friction stay hinge allows the sash to slide clear of the frame for easy access to external glass from inside the room.
Flying mullion design
No fixed central bar. The flying mullion attaches to the master sash and swings away when both sashes are open, giving a completely unobstructed opening.
Frame profile engineering
70mm EnergyPlus multi-chambered profiles with welded corners for structural rigidity, achieving A+ energy ratings across the range.
How It Works
From Survey to Sign-off
Step 1
Survey
We visit, measure, and advise on the right configuration for your property.
Step 2
Install
Our Cii team installs with clean, tidy workmanship.
Step 3
Sign-off
Final checks, handover, and Assure certification where required.
Next Step
Want a fixed quote from a real survey?
We will measure up, talk through finishes and installation details, and give you a clear quote based on the actual opening rather than a generic estimate.
Free surveyFixed quoteDirect Cii installation team
Checkatrade
“Job carried out on time and very professionally.”
Trustpilot
“Second time using CII for different properties. Easy process, good pricing, and the work was completed exactly as promised.”
Questions Answered
