Arched Head Windows in London
The window that sits at the top of a Georgian bay, above a Victorian bay-front porch or in the gable of a converted chapel. Radius, segmental and Gothic-arched heads CNC-cut to your survey template — matched precisely to the surrounding brickwork or stonework.
Arched Head Windows designed around sash-heavy period stock, communal-window agreements and RBKC / Camden conservation planning.
From Chelsea townhouses to Hampstead villas and Ruislip family homes, we install across every London borough — inside the M25 and out. Our surveyors know the quirks of Victorian sashes, Edwardian bays and post-war casements.
Working across London means understanding period detail, party-wall etiquette and permit parking as well as we understand glass. We schedule dust sheets, protection and clean-down like a good building firm should.
Energy-efficient arched head windows installed across London achieve whole-window U-values of 0.9–1.4 W/m²K, with the exact frame and glazing specification confirmed after survey.
SpecificationSix-chamber uPVC (fabricated to radius) or aluminium (roll-formed) profile · curved argon-filled A-rated glazing · warm-edge spacer bars · gothic tracery and radial bar options
What sets our arched head windows apart in London.
Radius, Segmental & Gothic
True radius (semi-circle), segmental (shallow arch), Tudor and Gothic (pointed) heads — CNC-cut to a survey template taken from the existing opening.
Template-Cut Precision
Every arched-head window is cut from a physical template surveyed on site — no assumptions, no gaps at the brickwork, no need to disturb the arch above.
Traceried & Divided
Arched heads can be divided by radial glazing bars, gothic tracery or curved astragal bars — matched to the period of the property.
Any Material
uPVC (fabricated on curved profile), aluminium (roll-formed) or heritage flush-casement — the material is chosen to suit the property, the head is cut the same way.
Modern Thermal Performance
Argon-filled A-rated glazing curved to the arch, warm-edge spacer bars and thermally-broken frames — U-values from 0.9 to 1.4 W/m²K on standard arched heads.
Chapels & School Conversions
The window we most often supply on chapel conversions, converted schools, Victorian bay fronts and stable-block conversions — properties where a rectangular replacement would look wrong.
Arched Head Windows installed across London.
We regularly install arched head windows across London. Explore your town for local detail on planning, postcodes and recent work.
Common questions from London homeowners.
- Do I need to remove the brickwork above the arch?
- No — we survey the internal arch profile with a template and cut the new frame to match. The masonry above stays completely undisturbed.
- Can the arched head be an opening light?
- Usually not — the curved head is a fixed light for structural reasons. Openings are placed in the rectangular section below the arch. On a large chapel-style window, we specify a radial opening light where head geometry permits.
- Can you match an existing Victorian bay-front arched window?
- Yes — we survey and template every arch individually, so even where original windows are inconsistent across a terrace we can match each one exactly. A single terrace of five bay-front houses might have five slightly different templates; we cut all five.
- What makes arched-head windows more specialised?
- Each frame is CNC-cut to a physical template, while the profile and sealed glass unit must be curved precisely to the opening. Repeated matching arches can be manufactured from the same approved template.
Related windows services in London.
Book your London survey.
Tell us about your London project. A senior surveyor will call within one working day to arrange a free on-site visit and fixed quote for your arched head windows.