French Casement Windows in Hatfield, Hertfordshire
Every french casement windows project we deliver in Hatfield starts with a senior surveyor on site — measuring, listening, and specifying to the character of Old Hatfield, Ellenbrook and the wider Hertfordshire area. French casement windows with twin opening sashes and no central mullion — the widest clear opening in the range.
French Casement Windows designed around Edwardian and Victorian bays along the A1(M) corridor — acoustic packages included.
Hatfield combines the historic Fore Street and Hatfield House estate with post-war new-town estates and the growing Ellenbrook developments across AL9 and AL10. Every survey is spec'd to the property.
SpecificationSix-chamber uPVC or thermally-broken aluminium profile · shoot-bolted centre meeting stile · argon-filled A+ glazing · Yale multi-point locking
Why Hatfield homeowners choose South East Windows & Doors.
Hatfield surveys, Hertfordshire experience
A senior surveyor visits every Hatfield 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 french casement windows
Every french casement windows we install in Hatfield is manufactured to the survey — not selected from a stock list. That's why the finish, sightlines and thresholds match the property.
Postcode-covered: AL9, AL10
Weekly installs across AL9, AL10 and the surrounding Hertfordshire area, with parking, protection and clean-down handled by our own crews. Insurance-backed 10-year guarantee on every french casement windows project.
What sets our french casement windows apart in Hatfield.
No Central Mullion
Both sashes meet on a shoot-bolted centre stile that opens with them — the aperture is completely clear when both are open, unlike a standard 2-light casement.
Widest Clear Opening
Up to 1.6m of clear width on a standard aperture — the widest opening on any hinged window we supply, and a compliant Doc B fire escape on habitable first-floor rooms.
Kitchen & Dining Room Favourite
The natural choice above a sink or over a garden view — throw both sides open and the view is uninterrupted.
Available in All Three Ranges
In uPVC, thermally-broken aluminium or heritage flush-casement — same principle, three material finishes to suit the property.
PAS 24 Secured Locking
Multi-point espagnolette locking on both sashes with shoot-bolts top and bottom — as secure as any single-sash casement, tested to PAS 24:2016.
Astragal & Georgian Bar Options
Full bar and glazing options — a French casement can carry the same period detailing as a fixed light of the same size.
What Hatfield homeowners tell us.
"A proper trade. Every promise kept — from the timescale to the finish. We've since recommended them to three neighbours."
"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."
Common questions from Hatfield homeowners.
- Do you install french casement windows in Hatfield?
- Yes — South East Windows & Doors installs french casement windows across Hatfield (AL9, AL10) and the wider Hertfordshire area every week. Every project is surveyed, manufactured and installed by our own teams.
- How long does french casement windows installation take in Hatfield?
- Most Hatfield projects run to a two-to-eight week lead time from signed quote to install, depending on manufacture. Once on site, a typical french casement windows install completes in one to five working days with full dust-sheet protection and clean-down.
- Do you handle conservation-area planning in Hatfield?
- 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 Hatfield projects that require them.
- What guarantee covers french casement windows in Hatfield?
- Every french casement windows installation in Hatfield 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 french casement windows work near Hatfield?
- Yes — we can share recent french casement windows case studies from across Hertfordshire, including projects in Old Hatfield, Ellenbrook and neighbouring towns. Ask your surveyor at the on-site visit.
- What thermal performance does french casement windows achieve in Hatfield?
- Energy-efficient french casement windows installed across Hatfield, Hertfordshire achieve whole-window U-values of 0.9–1.4 W/m²K, with the exact frame and glazing specification confirmed after survey.
- How is a French casement different from a normal 2-light casement?
- A normal 2-light casement has a fixed mullion between the two sashes — you always see the vertical bar. A French casement has no mullion; the two sashes meet on a movable centre stile that opens with them, so when both are open the aperture is completely clear.
- Are they secure without a central mullion?
- Yes — the meeting stile has shoot-bolts at the top and bottom that engage into the outer frame, and the active sash has multi-point espag locking. The whole assembly is tested to PAS 24 and provides the same security as a standard casement.
- Can I have Georgian bars on a French casement?
- Yes — astragal and Georgian bars in 18mm or 25mm, applied or through-frame, are available on both sashes and any fixed lights above. Popular on flush-casement French windows in period properties.
Also serving french casement windows near Hatfield.
Same french casement windows, same team — installed across neighbouring towns in Hertfordshire and beyond.
Related windows for Hatfield homes.
Book your Hatfield survey.
Tell us about your Hatfield project. A senior surveyor will call within one working day to arrange a free on-site visit and fixed quote for your french casement windows.