Transform Your Home's Windows with Premium Astragal Bars

Enhance your home with premium astragal bars. Our in-house assessors and installers measure and fit every window with precision, ensuring each bar is secure and perfectly aligned. Where new or replacement glazing is involved, our FENSA registration (33081) ensures compliance, backed by a 10-year insurance-backed guarantee.

Dimensions Max size 2.5M high x 1.5M wide
Thermally Broken As standard
Glass Astragal bars, Satin, Double Glazed

Professional Astragal Bar Installation & Replacement Services

As a leading astragal bar installer founded in 2009, Bowalker provides premium astragal bar installation and replacement services for homeowners seeking modern glazing solutions that enhance kerb appeal, preserve traditional aesthetics, and optimise interior light flow. Our in-house window installers measure, replace and install astragal bars for casement, tilt & turn, sash, fixed, roof, bay and bow windows, ensuring each installation matches the property’s architectural style and glazing requirements.

Our astragal bar installation works across bespoke window designs, sealed double‑glazed units and heritage‑style profiles, pairing energy‑efficient glass with precision‑applied bar systems to recreate the look of genuine divided panes. Each replacement is built around multi‑chambered profiles, secure fixings and weather‑resistant finishes, so the bars stay true and the glazing keeps performing season after season.

Call Bowalker on 01444 810 111 to arrange your free consultation for astragal bar installation and replacement services. From measurement to astragal bar fitting and final inspection, our professional window installers deliver a reliable service, backed by our 10‑year guarantee, with FENSA registration (33081) covering any glazing replaced as part of the work.

Materials

uPVC
Timber
Satin

Standard Hardware

Chrome
Satin
Gold Knob
Antique Black Knob

Standard Colours

Smooth White
Cream
Painswick Grey
Chartwell Green
Anthracite Grey
Irish Oak
Dual Colour
Paint to Order

Glass

Triple Glazed
Satin
Astragal Bars

Standard Layouts

Single
Double
Triple

Our Certifications and Professional Standards

Why Homeowners Choose Bowalker For Astragal Bar Installation ?

Homeowners choose Bowalker for astragal bar installation services for its 10-year insurance-backed guarantee, structured full-service approach and skilled in-house installers who complete every project without subcontractors, ensuring consistent workmanship and compliance. Established in 2009, Bowalker operates under FENSA Reg: 33081 certification with a dedicated team responsible for precise astragal bar fitting. Our astragal bar installation service preserves traditional aesthetics, creates authentic divided-light detailing and integrates with double-glazed units for modern performance. A fixed-price guarantee ensures transparent costs and a controlled process from consultation through to final installation.

10-year Insurance-backed Guarantee

Fensa Registered And Fully Compliant

Hassle-free, Full-service Experience

In-house Installers (No Subcontractors)

Fixed Pricing Guarantee, No Surprises

Types of Windows We Fit Astragal Bars

At Bowalker, we install and replace astragal bars on casement windows to suit your property's character, whether modern, Victorian or period. Their side‑hinged openings give clear glazing sections that the bars divide into a classic multi‑pane layout without getting in the way of how the window works.

Our in‑house installers fit each bar against energy‑efficient glazing, secure locking and weather‑resistant frames, sharpening the look of the window and lifting your home's kerb appeal in one tidy, full‑service visit.

Tilt and turn windows tilt inward for ventilation and swing fully open for access, and we add astragal bars without disturbing either function. Each bar is aligned so the glazing reads as a traditional multi-pane unit while the window still operates exactly as it should. Built in aluminium or uPVC with modern double glazing,

the result holds its warmth, lets you control airflow and asks little of you beyond the occasional wipe, period detailing on a window that behaves like a contemporary one.

Our installers fit astragal bars on sash windows so the finish honours how these windows were originally drawn while meeting modern home expectations. The vertically sliding sashes provide controlled ventilation, and the bars sit across the glass to recreate the Georgian and Victorian pane patterns the style is known for.

Whether the frames are timber, aluminium or uPVC, we pair them with double glazing for warmth and security, keeping the unmistakable sash character without the draughts that used to come with it.

Fixed windows do not open. Instead, they exist to pull in light and frame a clear view, which makes the glazing pattern the one thing you really notice. We fit astragal bars across them to bring back a traditional,

structured layout while leaving the sealed unit completely intact. Our fitters keep the alignment exact and the seal airtight, so you gain the symmetry and period detail without losing any of the insulation that the fixed unit was built to give.

Roof windows sit in the roofline on a centre‑pivot or top hinge, bringing daylight and fresh air into lofts and attic rooms. We position astragal bars across them for a balanced, multi‑pane look that never gets in the way of opening or closing the window.

Working up at height, our in‑house team keeps the seal weather‑tight around the double‑glazed unit, so the room stays warm and evenly lit whatever the weather is doing above it.

Bay windows step outward in several angled sections, so the trick with astragal bars is making the pattern read as one continuous design rather than three or four separate windows. We line the bars up across every facet so the glazing matches whether you're looking from inside or out.

Fixed securely into the double‑glazed units, each bar holds its place, the seals stay sound, and the bay keeps its crisp, even rhythm of light for the long run.

Bow windows curve outward across several panels to give a soft, rounded bay and plenty of light. We follow that curve with the astragal bars so the pane pattern flows unbroken from one panel to the next rather than stopping and starting.

Fixed firmly into the double‑glazed units, the bars keep the curve structurally sound, properly sealed and visually crisp, so light spreads evenly across the whole sweep for years to come.

No more windows to show

See Our Work In Action

Doors

Pool House

We helped create a stunning new-build pool house in West Sussex, featuring bespoke cornerless sliding doors and uninterrupted countryside views.

Rooflight

Living Room Extension

Partnership with builder to create a bright, modern living space with aluminium French doors, Bifold doors, matching windows, and a Lantern Rooflight.

Doors

Whole House Renovation

Assisted a developer with a full property renovation with, installing bespoke blue and black aluminium windows and doors.

Windows

Full Window & Door Upgrade

We helped transform an aging building with 56 new white uPVC windows and doors, enhancing thermal efficiency while keeping costs reasonable.

What Are the Benefits of Astragal Bar Installation?

Installing astragal bars enhances traditional and Georgian-style appeal, complements period and conservation-area homes, adds character without replacing your windows, requires minimal maintenance and cleaning, suits all window styles and home designs, and increases property value and kerb appeal. This installation creates a defined, divided-light appearance while working with existing glazing to maintain performance and long-term durability.

Enhances Traditional & Georgian Style Appeal

Creates authentic divided-light patterns that replicate Georgian window layouts, improving visual accuracy and reinforcing classic architectural detailing across the property.

Complements Period and Conservation Area Homes

Maintains heritage aesthetics required in conservation settings, supporting compliance with planning expectations while preserving original design features.

Adds Character Without Replacing Your Windows

Improves the appearance of existing glazing by introducing structured pane divisions, allowing property upgrades without full window replacement.

Requires Minimal Maintenance and Cleaning

Uses durable materials such as uPVC or aluminium, reducing upkeep needs and ensuring long-term performance with simple cleaning routines.

Complements All Window Styles and Home Designs

Integrates with window types such as sash, casement, bay and fixed windows, maintaining consistent visual detailing throughout the property.

Increases Property Value and Kerb Appeal

Improves external presentation and architectural definition, supporting higher property value and creating a stronger first impression.

How to Get Started with Astragal Bar Installation and Replacement at Bowalker

Getting started with astragal bar installation at Bowalker involves arranging a free consultation, receiving a no-obligation quote and scheduling installation with our professional window fitters. Our experienced astragal bar installation team assesses your existing windows, recommends suitable astragal bar styles such as Georgian or applied bars and ensures each design aligns with your property’s architecture. We ensure precise fitting that enhances visual detailing while maintaining compatibility with double-glazed units and overall window performance.

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Areas We Serve

Bowalker provides professional astragal bar installation services across Sussex, Surrey and London, delivering high-quality glazing enhancements with precision and care. Our astragal bar installation team ensures consistent workmanship, accurate fitting and reliable service for homeowners throughout these regions, maintaining strong visual detailing while supporting long-term window performance.

What Our Happy Customers Say

EXCELLENT

Based on 36 reviews

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Mark 22 hours ago

Had a problem with our door which was installed 3 years ago - Bowalker - Dean - came to site within 24 hours and helped resolved- thank you ! Very pleased with professional and prompt service

Marchants Estate Agents Hassocks 2 weeks ago

Excellent service from a local independent company. Highly recommend.

Andy Clarke 3 days ago

I had replacement windows installed. Design and advice was good and cost was competitive. Installation was started in a good time to a good standard.

Abi Hosier a month ago

Bowalker have been incredibly helpful and provided me with extremely useful information about the windows and doors at a property I moved into, previously supplied by them. Great customer service, really recommend

steph park a month ago

Bowalker replaced all of our windows and patio doors in November. They are very efficient and got the job done in the pouring rain but did it quick and professionally. We had a couple of teething issues with the doors after completion and they did not hesitate to come out and rectify the issue. Excellent customer service and a friendly team. Would highly recommend

Nic Downer Edited 3 months ago

We had a total of 6 windows fitted at end of June 2025 (2 bathroom(frosted), 1 hallway,1 dining room and two big bay windows complete with 2 window boards). Took 5 days in total as bay windows were load bearing ,the window boards were not in warehouse so took extra time to arrive and fit , the silicone/mastic finish wasn’t great and they cut one end of a window board wrong , but after a telephone call a new team of fitters came out and rectified the mistakes of original fitters that we had noticed , a window pane had got scratched in delivery so they replaced that as well. This was a big job that entailed some mistakes but over time was rectified by bowalker windows by sending out another team of fitters to fix some minor mistakes of original fitters . We went on a recommendation from a work colleague who had used Bowalker windows in the past as were very good. Maybe just improve your fitters mastic silicone skills a bit more but is is an old house of 110 years and nothing is level in this house

Mark Fitzpatrick 4 months ago

As a property developer operating across Brighton and Hove, I rely on trusted trades who consistently deliver — and Bowalker Windows Ltd, led by Zack Newman, is one of those partners. We specify their windows across all our developments because their products meet the high standards our clients expect, installations are completed on schedule, and site coordination with our contractors is seamless. Zack is responsive, pragmatic, and straightforward about lead times and costs, which makes planning and handovers far easier. Their workmanship is excellent, energy-performance claims are reliable, and they stand behind their warranty. Competitive pricing, professional teams, and reliable aftercare mean we’ll continue to use Bowalker Windows on future projects. Highly recommended for any developer or home owners in the Brighton & Hove area.

mark Matthew 4 months ago

5 stars! I recently had all the windows in my home replaced by Bowalker Windows and couldn’t be happier with the result. From my very first contact I worked with Zack Newman — he was professional, knowledgeable, and transparent about pricing and timelines. The installation team arrived on time, worked efficiently, and left the house clean. The new windows look fantastic, operate smoothly, and have already made a noticeable difference in comfort and noise reduction. Excellent customer service from start to finish — I highly recommend Zack and Bowalker Windows to anyone looking for quality work and a hassle-free experience.

Graeme Edited 5 months ago

I am 9 years into our windows installation from Bowalker Windows. I emailed them on Sunday with an issue and by 3pm Monday afternoon they were at my home sorting the issue. This company's attitude to exceeding customer service and going the extra mile is in their DNA. These guys are just amazing from cradle to grave when it comes to windows and doors. I wouldn't go anywhere else. Simply fantastic.

Tatiana Gurova 10 months ago

The installation went quickly and without any problems. I recommended them as excellent specialists.

Meet Our Team

Our team at Bowalker includes highly skilled astragal bar installers who deliver precise, high-quality installations with careful attention to detail. Every astragal bar installer works fully in-house, ensuring consistent standards, full accountability and a smooth process from consultation through to completion. We focus on refining window aesthetics through precise divided-light detailing while maintaining glazing performance, security, and long-term durability, all backed by consistently high customer satisfaction.

Astragal Bars Project Gallery

Two anthracite sash windows in Hassocks

Ready To Get Started With Astragal Bar Installation at Bowalker?

Installing astragal bars improves your window’s visual structure, enhances traditional detailing and adds character while retaining existing glazing systems. Bowalker Windows Limited provides a complete, hassle-free installation service with a fully in-house team of installers, precision-fitted astragal bars and a 10-year insurance-backed guarantee for long-term reliability.

Call 01444 810 111 today to arrange your free consultation and receive a no-obligation quote. Our specialist astragal bar installation team manages every stage with precision, ensuring each bar is aligned correctly for a consistent appearance, durable performance, and authentic heritage-style detailing.

Frequently Asked Questions

What Are Astragal Bars?

Astragal bars are decorative, surface-mounted glazing bars fixed to both the internal and external sides of modern double-glazed windows to replicate the traditional multi-pane appearance of historic Georgian sash windows. These bars visually divide a single large glass unit into smaller sections, such as 6 or 9 panes, reflecting original glass design methods without using separate glass pieces.

How Much Does Astragal Bar Installation Cost?

Astragal bar installation costs between £200 and £400 per window, including parts and labour. The final cost depends on factors such as window size, number of panes created, bar design style, such as Georgian or custom patterns and the type of glazing system used. Custom configurations or larger window units may require additional fitting time, which can influence overall pricing while ensuring accurate alignment and a consistent divided-light finish.

How long does an Astragal Bar installation take?

Astragal bar installation takes 30 to 60 minutes per window, depending on the size, the number of glazing sections, and the bar design. This timeframe includes careful alignment and secure fixing to ensure a consistent divided-light appearance and proper integration with the existing glazing system.

What Guarantee Do You Provide on Astragal Bar Installation?

Bowalker Windows Limited offers a 10-year insurance-backed guarantee on all astragal bar installations, providing assurance of durability and reliable performance. This guarantee covers fitting precision and workmanship quality, ensuring each astragal bar is securely installed, accurately aligned and meets FENSA compliance standards for long-term performance and visual consistency.

How Much Does It Cost to Replace Astragal Bars in Windows?

Replacing existing astragal bars costs between £150 and £800 per window. The lower end reflects a straightforward like‑for‑like bar swap, while the upper end applies where bars are replaced alongside new double‑glazed units or on larger, multi‑pane sash and bay windows. In most cases, replacing the bars is more precise and quicker than a full glass replacement, particularly on traditional or period‑style windows.