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Enhance your property with heritage window installations from Bowalker Windows. Our experienced in-house installers measure every opening and install each window with exacting precision, with no subcontractors involved at any stage. Every installation is FENSA-registered (No 33081) and backed by a 10-year insurance-backed guarantee for lasting peace of mind.
As a leading flush window installer founded in 2009, Bowalker offers a complete installation and replacement service that improves thermal performance, enhances a property’s appearance and increases day-to-day comfort. Our in-house installers measures, supplies and installs flush casement and flush sash windows across uPVC, aluminium, timber and composite, ensuring every window suits the property’s architectural character and technical requirements.
Each installation includes multi-chambered profiles, multi-point locking systems and energy-rated double or triple glazing, with thermally broken aluminium frames where specified and low-emissivity glass as standard. Whether the project involves a single replacement or a whole-house installation, every window is fitted in accordance with current Building Regulations, with PAS 24 security certification available where required.
Call Bowalker on 01444 810 111 to arrange your free home consultation, where we confirm specifications, advise on material and glazing options and provide a fixed-price quote with no hidden costs. All installations are backed by FENSA registration (33081) and a 10-year insurance-backed guarantee.
uPVC
Aluminium
Timber
Chrome
Satin
Black
White
Anthacite Grey
Black
White
Chartwell Green
Golden Oak
Irish Oak
Dual Colour
Triple Glazed
Obsure
Astragal Bars
Single
2 x 2
Bay
Homeowners choose Bowalker for flush window installation because of our commitment to quality workmanship, a transparent fixed-price process and an experienced in-house team that handles every stage from the initial survey to final inspection. Founded in 2009, we have built a reputation on accurate measurement, reliable fitting across uPVC, aluminium, timber and composite, and honest, straightforward service. We never use subcontractors, ensuring the same team surveys, fits and inspects every window to a consistent standard throughout.
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
No more windows to show
Installing flush windows improves a property’s appearance, strengthens security, enhances energy efficiency and adds lasting value across a wide range of property types. Modern flush casement and flush sash windows use multi-chambered profiles, thermally broken frames and precision-fitted compression seals to reduce heat loss, eliminate draughts and create a streamlined exterior finish that suits both traditional and contemporary architecture.
Eight key benefits of installing flush windows are:
Slim and Attractive Design
The flat exterior profile replicates traditional painted timber joinery, creating a clean, minimalist finish with no protruding sash or visible rebate line.
Improved Security
Every flush window Bowalker installs features a multi-point locking system with shootbolt hardware, reinforced frame sections and toughened or laminated safety glass, meeting PAS 24 security requirements where specified.
Low Maintenance & Durable
uPVC and aluminium frames require no painting or treating and resist rot, corrosion and UV degradation, while engineered timber frames need only occasional redecoration every eight to ten years.
Enhances Energy Efficiency
Multi-chambered profiles, polyamide thermal breaks and low-emissivity double or triple glazing minimise heat loss and prevent cold bridging, with most installations achieving a Window Energy Rating of Band A.
Planning and Conservation Compliance
Flush windows are the only casement type accepted by many local planning authorities in conservation areas and on Article 4 properties, as their flat profile closely replicates the profile of original single-glazed timber windows.
Better Noise Reduction
Precision-fitted compression seals, multi-chambered frame sections and acoustic laminated glazing options significantly reduce the transmission of external noise from traffic, railway lines and busy streets.
Weather Resistance
Compression seals and durable EPDM gaskets keep frames completely watertight and windproof under sustained exposure, particularly valuable for coastal, hilltop and south-facing properties across East and West Sussex.
Increased Property Value
Flush windows are increasingly specified by architects and required by planning conditions, making them a recognised quality indicator that strengthens a property's appeal in the resale market.
Getting started with flush window installation and replacement at Bowalker is straightforward and efficient, allowing homeowners to arrange a consultation, receive a clear quote and schedule professional installation. Our experienced installation team assesses your property and recommends flush casement or flush sash windows matched to your architectural style, energy-efficiency goals and performance requirements.
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Bowalker provides professional flush window installation services across Sussex, Surrey, Hampshire and London, delivering high-quality, premium flush windows with precision and care. Our flush window installation team ensures consistent workmanship, reliable installation and continuous support for homeowners throughout these regions.
Excellent service from a local independent company. Highly recommend.
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.
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
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
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
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.
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.
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.
The installation went quickly and without any problems. I recommended them as excellent specialists.
We have used Bowalker on several occasions for replacement windows and doors and have always been pleased with the work, product price snd communication
Enhance the comfort, style, and energy efficiency of your home with our premium windows and doors, contact us today.
Our team at Bowalker comprises highly skilled window installers and specialists who deliver premium installations with accuracy and attention to detail. Every flush window installer works fully in-house, ensuring consistent quality, accountability and a seamless experience from consultation to completion. We are committed to making your home warm, safe and stylish, with a focus on customer satisfaction and long-lasting performance.
Zack Newman
Director
Anthony Bowyer
Senior Surveyor
Dean Lloyd
Operations Manager
Angela Georgant
Financial Controller
Jack Harsford
Installer
Leon Prichard
Installer
Tim Cooper
Installer
Lloyd Walker
Installer
Tim Fraser
Installer
Brandon Bowyer
Installer
Zack Newman
Director
Anthony Bowyer
Senior Surveyor
Dean Lloyd
Operations Manager
Angela Georgant
Financial Controller
Jack Harsford
Installer
Leon Prichard
Installer
Tim Cooper
Installer
Lloyd Walker
Installer
Tim Fraser
Installer
Brandon Bowyer
Installer
Elevating to flush windows can transform your home’s comfort, energy efficiency and appearance, making it brighter, warmer and more stylish. Bowalker provides a full-service, hassle-free installation with a fully in-house team of window installers, premium quality glazing systems and a 10-year insurance-backed guarantee to ensure long-term reliability and performance.
Enhance the comfort, style, and energy efficiency of your home with our premium windows and doors, contact us today.
Flush windows are a type of casement window where the opening sash sits perfectly level with the external face of the frame, creating a smooth, flat exterior surface. Unlike standard lipped casement windows, where the sash protrudes slightly from the frame, flush windows produce a clean, unbroken elevation. This profile closely replicates the appearance of original single-glazed timber joinery, making flush windows the preferred choice for heritage properties, conservation areas and minimalist modern designs alike.
Flush casement windows cost between £500 and £1,700 per window depending on material, size and glazing specification. uPVC flush casements start from around £500 to £750, aluminium from £600 to £1,500 and timber or composite from £800 to £1,700.
At Bowalker, the total cost comprises a supply price based on your chosen material, frame size and glazing options, plus a fixed installation rate of £150 per casement window, inclusive of VAT, surveying and disposal of the old window.
Flush windows are made from materials such as uPVC, aluminium, timber and composite structures. Aluminium provides the slimmest frame profiles with sightlines from 45 mm and a service life exceeding 40 years. Timber delivers the authentic joinery appearance required for listed buildings and properties in conservation areas. Composite combines a solid engineered timber interior with a thermally broken aluminium exterior shell, offering the highest levels of thermal performance, acoustic insulation and durability in a single system.
Installing a flush window takes 1 to 2 hours per window when completed by professional fitters. A full-house installation of 8 to 12 windows usually takes 1 to 2 days. The process can take longer where old frames require structural repairs, where access is restricted or where bespoke sizing is involved. From placing your order to installation day, most projects are completed within 6 weeks.
Bowalker provides a 10-year insurance-backed guarantee on every flush window installation. This guarantee is underwritten by an independent insurer, meaning it remains valid regardless of any change in circumstances, giving you genuine long-term protection on your investment. Every installation is also registered with FENSA (reg. 33081), confirming compliance with current Building Regulations and providing the certification required if you come to sell your property.
You do not need to be at home for the installation, provided we have clear access to the property and your preferences have been confirmed in advance. Our fully in-house team carries out the work professionally, with careful handling throughout and a final inspection on completion. All our installers are directly employed by Bowalker with no subcontractors on site.
Replacing an existing flush window costs between £700 and £2,250 per window in the UK depending on material and specification, with uPVC at the lower end (£700 to £1,500 per window) and aluminium (£875 to £1,800 per window), timber or composite progressively higher (£1,050 to £2,250+ per window).
At Bowalker, replacement follows the same transparent two-part pricing structure, with a supply price for the new unit plus a fixed installation rate of £150 per casement window, which covers survey, removal and disposal of the old frame and FENSA registration.
A standard casement window has a sash that sits slightly proud of the outer frame, creating a visible rebate line on the exterior face, whereas a flush window has no such step, with the sash sitting entirely level with the frame to produce a flat, unbroken surface. Beyond the visual difference, the flush fit improves weathertightness by allowing compression seals to engage more evenly around the full perimeter of the sash. In conservation areas and on listed buildings, flush windows are frequently the only type that planning authorities will approve.
In most cases, replacing existing windows on a standard residential property is covered by permitted development rights and does not require a planning application. However, if your property is in a conservation area, is a listed building or has had its permitted development rights removed through an Article 4 direction, you may need consent before proceeding. Our team confirms the relevant planning position at survey stage. All our installations are FENSA-registered, demonstrating compliance with the Building Regulations independently of any planning requirement.
Flush windows are frequently the only casement type that local planning authorities will approve in conservation areas, as their flat profile accurately replicates the appearance of the original single-glazed timber windows that defined the character of most pre-1919 housing. Standard lipped casements, which protrude from the frame, are regularly refused on conservation grounds. Bowalker has extensive experience installing flush windows on properties subject to conservation area controls and Article 4 directions across Sussex and Surrey and can advise on specification and compliance during the free consultation.
