Arched Head Windows in Harpenden, Hertfordshire
We install arched head windows across Harpenden (AL5) week in, week out — matched sightlines, planning-ready detailing and finish standards suited to Hertfordshire homes from Harpenden Common through Southdown.
Arched Head Windows designed around Edwardian and Victorian bays along the A1(M) corridor — acoustic packages included.
Harpenden's Common-side villas, generous Edwardian family homes and Southdown-quarter houses respond dramatically to a proper upgrade. Every AL5 survey is walked with a senior surveyor.
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
Why Harpenden homeowners choose South East Windows & Doors.
Harpenden surveys, Hertfordshire experience
A senior surveyor visits every Harpenden project in person — no call-centre, no sub-contracted quoting. We understand Edwardian and Victorian bays along the A1(M) corridor — acoustic packages included because we install across Hertfordshire every week.
Made-to-measure arched head windows
Every arched head windows we install in Harpenden is manufactured to the survey — not selected from a stock list. That's why the finish, sightlines and thresholds match the property.
Postcode-covered: AL5
Weekly installs across AL5 and the surrounding Hertfordshire area, with parking, protection and clean-down handled by our own crews. Insurance-backed 10-year guarantee on every arched head windows project.
What sets our arched head windows apart in Harpenden.
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.
What Harpenden homeowners tell us.
"Slim aluminium sashes in anthracite grey — exactly the balance of period feel and modern lines we wanted. Conservation area approved."
"Punctual, quiet, tidy, honest. Three years on the front door still closes with that satisfying thud, and the paint finish hasn't moved."
"A proper trade. Every promise kept — from the timescale to the finish. We've since recommended them to three neighbours."
Common questions from Harpenden homeowners.
- Do you install arched head windows in Harpenden?
- Yes — South East Windows & Doors installs arched head windows across Harpenden (AL5) and the wider Hertfordshire area every week. Every project is surveyed, manufactured and installed by our own teams.
- How long does arched head windows installation take in Harpenden?
- Most Harpenden projects run to a two-to-eight week lead time from signed quote to install, depending on manufacture. Once on site, a typical arched head windows install completes in one to five working days with full dust-sheet protection and clean-down.
- Do you handle conservation-area planning in Harpenden?
- The A1(M) and A41 corridor means Hertfordshire homeowners consistently benefit from acoustic-rated glazing. We spec triple-glazed and laminated options that transform a home's soundscape. We prepare planning-ready drawings with matched sightlines, glazing-bar depths and hardware for Harpenden projects that require them.
- What guarantee covers arched head windows in Harpenden?
- Every arched head windows installation in Harpenden is covered by our insurance-backed 10-year guarantee — parts, labour and finish. Aftercare is direct with the installing team, not a call centre.
- Can I see recent arched head windows work near Harpenden?
- Yes — we can share recent arched head windows case studies from across Hertfordshire, including projects in Harpenden Common, Southdown and neighbouring towns. Ask your surveyor at the on-site visit.
- What thermal performance does arched head windows achieve in Harpenden?
- Energy-efficient arched head windows installed across Harpenden, Hertfordshire achieve whole-window U-values of 0.9–1.4 W/m²K, with the exact frame and glazing specification confirmed after survey.
- 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.
Also serving arched head windows near Harpenden.
Same arched head windows, same team — installed across neighbouring towns in Hertfordshire and beyond.
Related windows for Harpenden homes.
Book your Harpenden survey.
Tell us about your Harpenden 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.