FC-01
Single flush side-hung
One flush sash, hinged at the side.
Quote this layout: Single flush side-hungWindows
Flush casement windows
In a flush casement, each opening sash sits level with the outer frame instead of lapping over it. That flat face is how timber casements have been made in Britain for centuries. It suits period cottages and terraces, and modern homes that want a cleaner, more architectural look.
See all 6 layoutsFlush casements use deeper, more detailed profiles than a standard casement. Many systems offer mechanical or timber-style corner joints and a woodgrain texture, so you do not see the welded corner line of a standard uPVC frame. Anthracite grey, black, Chartwell green and cream are popular, and dual colour (a heritage colour outside, white inside) is common.
There are trade-offs. The frames are bulkier and cost more than a standard casement, and the sightlines can be slightly wider, which leaves a little less glass for the same opening. If you are replacing every window in the house, ask for both styles on your quote and compare them side by side.
In a conservation area, a flush casement is often the uPVC design most likely to be accepted. We can supply drawings, specifications and colour samples to support an application, but the decision rests with your local planning authority. Check whether an Article 4 direction applies to your street before you order.
6 standard layouts
The layouts we fit most in UK homes. Every one is made to measure, and you choose the opening side, colour and glass. Need something different? Tell us and we’ll draw it for you.
FC-02Popular
Two-pane: flush side-hung and fixed
A flush opener beside a fixed light.
Quote this layout: Two-pane: flush side-hung and fixedFC-03
Two-pane: pair of flush side-hung sashes
Two flush openers hinged at the outer edges, like traditional timber casements.
Quote this layout: Two-pane: pair of flush side-hung sashesFC-04
Two-pane: flush top-hung over fixed
Two fixed lights, each with a flush top-hung vent above.
Quote this layout: Two-pane: flush top-hung over fixedFC-05Popular
Three-pane: flush openers at both ends
A fixed centre with a flush side-hung opener at each end.
Quote this layout: Three-pane: flush openers at both endsFC-06
Three-pane: side-hung, fixed and top-hung
Flush side-hung opener, fixed centre, and a top-hung vent over a fixed light.
Quote this layout: Three-pane: side-hung, fixed and top-hungDrawings are viewed from outside and are not to scale. Dashed lines meet at the hinge side. Sizes are typical starting points; we measure every opening at survey.
Why choose flush casement windows
01
Flat, timber-style face
Sashes sit level with the frame, with a woodgrain texture and neat corner joints.
02
Heritage colours
Single or dual colour, with matching cills, bars and hardware.
03
Same security
Multipoint locking and key-locking handles, as on a standard casement.
04
Low maintenance
No sanding or repainting. Wash the frames down a few times a year.
At a glance
Exact figures depend on the system and options you choose. We confirm them on your written quote.
| Opening types | Side-hung, top-hung, fixed |
|---|---|
| Glazing | Double glazed as standard. Triple glazing available on request |
| Energy | Meets Building Regulations Part L for replacement windows (U-value 1.4 W/m²K or better, or WER band B or above). A-rated options available |
| Ventilation | Trickle vents fitted where Part F requires them, including wherever the old windows had them |
| Safety glass | Toughened or laminated glass in critical locations, including any pane within 800 mm of the floor (Part K) |
| Colours | White, cream, woodgrain foils and solid colours including anthracite grey (RAL 7016), black and Chartwell green |
| Hardware | Butt hinges or friction hinges; monkey-tail or contemporary handles |
About flush casement windows
Is a flush casement more expensive than a standard casement?
Yes. The profiles are larger and take more work to make, so expect a higher price per window. If you are undecided, ask for both options on your quote so you can compare like for like.
Will flush casements be allowed in my conservation area?
It depends on your council and whether an Article 4 direction covers your street. We can provide drawings, specifications and samples for your application. The planning authority makes the decision.
What are butt hinges?
Butt hinges have a visible knuckle on the outside of the frame, like the hinges on old timber casements. They add to the traditional look. Friction hinges are hidden inside the frame and give an easy-clean position, so some people choose butt hinges at the front of the house and friction hinges elsewhere.
Can I have a different colour inside and out?
Yes. Dual colour is common on flush casements, usually a heritage colour or woodgrain outside with white inside. Ask to see samples at survey, because colours look different on a small swatch than on a whole frame.
Similar styles
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Free survey · written quote · no obligation
Get a price for flush casement windows.
Send rough sizes and a few photos for an estimate. Or book a free survey and we’ll measure everything ourselves.