Georgian Bar Windows — London & the Home Counties
Duplex-butt jointing
At every intersection the bar is mechanically jointed rather than moulded — the intersection has the same visual weight as the surrounding bar, exactly as a real timber glazing bar would. It's the detail that separates a heritage bar from a printed grille.
Overview
The single detail that turns a modern window into a period one. Georgian and astragal bars in 18mm or 25mm profile, jointed with authentic duplex-butt at every intersection, in through-frame, internal or external configurations — across all three of our window ranges.
18mm or 25mm astragal bars · through-frame, internal-Grille or external configurations · duplex-butt mechanical jointing · lead-effect upgrades · matching hardware finishes
Through-Frame Astragal Bars
The bar physically passes through the sealed glass unit — the most convincing option and the one most likely to secure planning consent in conservation areas.
18mm or 25mm Profile
Two heritage widths — 18mm for slimmer Regency and Victorian proportions, 25mm for the deeper bars typical of Georgian and Edwardian properties.
Duplex-Butt Jointing
Bar intersections are mechanically jointed rather than moulded — the joint has the same visual weight as the surrounding bar, exactly as a real timber glazing bar would.
Any Layout
6-over-6, 8-over-8, 6-over-1 (Victorian sash), 2-over-2 (Edwardian), diamond, marginal-light — matched to the age and style of the property.
Lead-Effect Upgrade
Lead-effect and stained-glass upgrades for Arts & Crafts, Victorian villa and cottage-style properties. Coloured, textured and etched glass available.
Across All Three Ranges
Available on uPVC, aluminium and flush-casement — the bar profile and jointing are consistent regardless of which material you specify.
Three material ranges, one configuration.
The georgian bar configuration is available across every one of our window ranges — the material choice is yours.
Engineered to the millimetre.
Every frame we install is made to your survey sizes with the following performance envelope as standard.
- Bar widths
- 18 mm · 25 mm
- Configurations
- Through-frame (bar passes through unit) · internal grille · external applied
- Jointing
- Mechanical duplex-butt at every intersection
- Layouts
- 6-over-6 · 8-over-8 · 6-over-1 · 2-over-2 · diamond · marginal
- Compatible with
- uPVC · aluminium · flush casement · vertical sliding sash
- Upgrades
- Lead-effect · stained glass · etched · textured obscure
Georgian Bar Windows across London
and the Home Counties.
We install georgian bar windows across six counties — every project surveyed, made and fitted by our in-house team. Choose your county to read local knowledge, planning notes and recent work.
See all areas coveredGeorgian Bar Windows — installed.
A selection of recent installations across London and the Home Counties, photographed on site.
Practical answers.
Everything homeowners ask us about georgian bar windows — survey, lead times, guarantees and coverage.
Which bar option is most authentic?+
Through-frame 18mm astragal bars with duplex-butt jointing at the intersections — the bar physically passes through the sealed glass unit rather than being applied internally or externally. It is the most convincing option and the one most likely to secure planning consent in a conservation area.
What's the difference between astragal and Georgian bars?+
Colloquially they refer to the same thing — a bar that visually divides a window into smaller panes. Strictly, an astragal is the moulded profile of the bar itself; Georgian refers to the layout (typically 6-over-6). Our bars are moulded astragal profiles in the classical Georgian, Regency and Victorian layouts.
Do bars reduce thermal performance?+
Through-frame bars reduce whole-window U-value by roughly 0.1 W/m²K vs an equivalent bar-free unit. Internal-grille and external-applied bars have no thermal penalty because they don't cross the sealed unit.
Can I have Georgian bars on a bay window?+
Yes — on any bay, bow or sash configuration. We match the bar profile, colour and jointing across the whole assembly.
Enquire about
Georgian Bar Windows.
Speak with our design team, book a home survey, and receive a fixed written quotation — all with no obligation.
Call · 020 3633 0405