Side hung casement
Hinged at the side, opens like a door for maximum airflow and the clear escape opening bedrooms need. Egress hinges fitted where Building Regulations require them.
London's most-fitted window, every style
Casement windows in London, pick the style, we build the rest.
Glazing London supplies and installs made-to-measure casement windows across London: side hung, top hung, fixed and flush casement styles in uPVC, aluminium or timber, with A-rated glass and FENSA certification. Free survey and quote, and the phone answers 24/7 on 07399 253464.
The catalogue
Side hung
Top hung
Flush
Fixed light
Four casement styles, one made-to-measure frame.
A casement window is simply a sash hinged to a frame, but where you put the hinge changes how the window lives. Most London frames combine two or three of these styles side by side, so you rarely have to choose just one.
Top hung casement
Hinged at the top so it can sit open in light rain without letting water in. The usual choice over kitchen sinks, in bathrooms and across wide openings.
Flush casement
The sash closes perfectly level with the frame face: the flat, traditional profile pre-war London streets were built with, now available in uPVC, aluminium and timber.
Fixed light
No hinge at all, just glass and daylight. Paired with opening sashes to keep sightlines slim and cost down where ventilation is not needed.
The detail that changes the look
Flush vs stormproof casements
Both are proper casement windows; the difference is how the sash meets the frame. It is worth deciding before you get quotes, because it changes the kerb-side character of the whole house.
| Consideration | Flush casement | Stormproof (lipped) |
|---|---|---|
| Look | Sash sits level with the frame: flat, traditional, joinery-like | Sash overlaps the frame with a visible lip: the modern default |
| Best for | Period properties, conservation areas, cottages | Post-war homes, extensions, best value on most streets |
| Weathering | Double gaskets seal within the rebate | Overlap adds an extra physical weather check |
| Materials | uPVC, aluminium or timber | uPVC or timber |
| Cost | Slightly higher for the same size | Usually the cheaper of the two |
Three materials, one fitting team
uPVC, aluminium or timber casements
uPVC casement windows
The best-value route: 70mm multi-chambered profile, A-rated 28mm double glazing (around 1.2 W/m²K), white, anthracite or woodgrain foils. Made to measure by our sister company Prime Fabrication, typically fitted within 7-10 days.
Explore uPVC windowsAluminium casement windows
Slim sightlines and big glass. Thermally broken frames in any RAL colour carry larger panes than uPVC can, which suits modern extensions and wide openings.
Explore aluminium windowsTimber casement windows
Engineered timber flush casements with factory-finished paint: the conservation-area answer, and the longest-lived window on the page when maintained.
Explore timber windowsEvery installation includes multi-point locking, internal beading, trickle vents where Part F requires them, and a FENSA certificate on completion, backed by an insurance-backed guarantee. Undecided on style? Start at the window and door installation hub, book a free survey, or if a broken window brought you here tonight, our 24/7 emergency glazing team is already awake.
Questions
Casement windows, answered
What is the difference between flush and stormproof casements?
On a flush casement the opening sash closes level with the frame face, the flat, traditional look found on cottages and pre-war London houses. On a stormproof (lipped) casement the sash overlaps the frame, giving an extra weather check. Flush wins on looks and is often required in conservation areas; stormproof is the modern default and usually costs slightly less.
Should I choose side hung or top hung casements?
Side hung sashes open like a door and give the biggest clear opening, which matters for fire escape from bedrooms. Top hung sashes hinge at the top, can be left cracked open in the rain, and suit wide openings. Most London windows combine both with fixed lights in one frame.
Are casement windows more secure than sash windows?
Generally yes. A casement sash pulls into the frame on multi-point espagnolette locking with mushroom cams, and the glass is internally beaded so it cannot be removed from outside. PAS 24 upgrades with laminated glass are available for ground floors and windows above flat roofs.
Do new casement windows need trickle vents?
Under Part F of the Building Regulations, replacement windows in England normally need background ventilation, usually a slim trickle vent in the frame head, unless equivalent ventilation exists elsewhere. We size and position vents at survey so they meet the regulation without spoiling the elevation, and your FENSA certificate confirms compliance.
How long does casement window installation take in London?
Typical lead time is 7-10 days from survey for uPVC and aluminium frames, made to measure by our sister company Prime Fabrication, and 4-6 weeks for timber. Fitting a whole house usually takes 1-2 days, with each opening weather-tight the same day.