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Transform Your Home with Premium Casement Windows
Professionally measured and installed by Bowalker’s in-house team, casement windows are available in uPVC, aluminium and timber with a range of glazing and opening configurations to suit traditional and contemporary properties. We complete qualifying replacement installations under our FENSA registration (33081) and support them with 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
Certifications And Standards
Professional Casement Windows Installation and Replacement Services
Founded in 2009 and FENSA-registered (33081), Bowalker Windows provides professional casement window installation and replacement services for homeowners seeking practical ventilation, modern glazing performance and flexible window design across traditional and contemporary properties. Our in-house installers survey, install and replace uPVC, aluminium and timber casement windows with side-hung, top-hung and combined opening configurations, available with double or triple glazing and a range of decorative glazing options including leaded, stained, obscure and satin glass.
Each casement window is carefully measured and installed so the frame, sash, hinges, locking hardware and sealed glazing unit operate correctly together over the long term. Depending on the selected specification, installations can incorporate Low-E glass, argon-filled sealed units, warm edge spacer bars, multipoint locking tested to PAS 24 security standards and compression weather-resistant seals, with frame finishes available across a wide range of colours and woodgrain foils.
Call Bowalker Windows on 01444 810 111 to arrange a free consultation, with qualifying replacements completed under FENSA registration (33081) and supported by a 10-year insurance-backed guarantee.
Materials
uPVC
Timber
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
Types of Casement Windows We Install and Replace
Casement Sash Windows
Casement Sash Windows
Hinged opening sashes within a surrounding outer frame give casement sash windows flexible ventilation, with single or multiple opening sections available depending on the room, window size and airflow requirements. Side-hung configurations provide practical everyday ventilation, while top-hung fanlights can be positioned above fixed or opening lower sections. Bowalker installs and replaces casement sash windows with precisely installed frames, smooth-operating friction hinges, secure multipoint locking and energy-efficient Low-E sealed units.
Learn More →Casement Flush Windows
Casement Flush Windows
Sitting level with the outer frame when closed, flush casement windows create a clean, understated exterior profile suited to contemporary properties and traditional homes where less prominent frame detailing is preferred. Flush profiles can also complement period renovations and some conservation settings, subject to the property's character and relevant planning requirements. We install and replace flush casement windows with secure multipoint locking, weather-resistant compression seals and energy-efficient glazing in uPVC, timber and aluminium frames.
Learn More →Carefully specified profiles, traditional glazing bars and period-inspired hardware distinguish casement heritage windows from standard replacements, making them well suited to period properties and heritage-style renovations where established sightlines and architectural character matter. Depending on the selected frame system, ovolo or lamb's tongue moulding profiles, Georgian bars or astragal detailing can be specified to complement existing joinery. Our in-house installers install heritage casement windows with sympathetic profiles, secure hardware and energy-efficient sealed units in uPVC, aluminium and timber.
Learn More →Providing ventilation from selected sections whilst retaining the natural light and architectural depth of a projecting bay, casement bay windows suit Victorian and Edwardian properties where sash or casement windows form part of the original elevation. Opening arrangements across the central and angled sections can be tailored to each room's ventilation needs. Bowalker installs and replaces casement bay windows with carefully aligned frames, secure multipoint hardware and energy-efficient sealed units for consistent operation across the complete bay.
Learn More →Where curved or shaped frame detailing creates a distinctive architectural feature on a period or feature elevation, casement arched windows combine hinged opening sections with bespoke frames shaped to match the curve and dimensions of the existing opening. The curved upper section typically forms a fixed light above an opening casement below, with the frame profile maintained consistently across both sections. We install and replace arched casement windows with carefully measured bespoke frames, suitable friction hinges, secure multipoint locking and precisely fitted sealed units.
Learn More →Traditional proportions, glazing bars, heritage-style ironmongery and woodgrain finishes combine in cottage casement windows to complement the exterior character of cottages, farmhouses and rural properties where window detailing contributes directly to the building's aesthetic. Monkey tail handles, espagnolette stays and other period-appropriate hardware options are available to reinforce the traditional appearance alongside the functional opening sash. Our installers install cottage casement windows with secure multipoint hardware, compression weather-resistant seals and energy-efficient sealed units in engineered timber, woodgrain uPVC or aluminium frames.
Learn More →Carefully selected profiles, traditional glazing proportions and period-inspired hardware distinguish historic casement windows from standard replacements, making them suitable for Georgian, Victorian and Edwardian properties where retaining architectural character is important. Slim glazing configurations and sympathetic frame details can be considered where appropriate, with the window specification selected to complement the property's character and relevant conservation requirements where applicable. Bowalker installs and replaces historic casement windows with carefully selected profiles, glazing details and suitable hardware, balancing traditional appearance with modern thermal performance.
Learn More →Larger areas of fixed glazing combined with one or more opening casement sections make picture casement windows well suited to living rooms, extensions and feature elevations where natural light, broad outward views and practical ventilation are priorities. Opening sections can be positioned around the principal fixed pane to provide airflow while retaining a generous glazed area. We install and replace casement picture windows with slim structural frames, sealed units incorporating Low-E glass and argon-filled cavities, secure locking hardware and carefully positioned opening sections to balance views, ventilation and thermal performance.
Learn More →Slim thermally broken aluminium profiles, geometric glazing bars and hinged opening sections give Crittall-style casement windows their characteristic steel-look appearance alongside practical everyday ventilation. Thermally broken aluminium systems allow narrow sightlines and larger glazed areas while reducing heat transfer through the frame compared with non-thermally broken aluminium. Our in-house installers install Crittall-style casement windows with energy-efficient glazing, secure multipoint hardware and durable powder-coated finishes in a range of RAL colours.
Learn More →Casement uPVC Windows
Casement uPVC Windows
Low-maintenance construction, multi-chambered profiles and good thermal performance make uPVC a practical frame material for casement windows across traditional and contemporary properties. Compatible systems can incorporate Low-E glass, argon-filled sealed units and warm-edge spacer bars to improve thermal performance. We install and replace uPVC casement windows with secure multipoint locking, durable hinges, weather-resistant seals and a range of colour and woodgrain foil finishes.
Learn More →Casement Aluminium Windows
Casement Aluminium Windows
Slim profiles, structural strength and long-term durability make aluminium a practical frame material for contemporary properties, extensions and renovations where narrow sightlines and larger glazed areas are priorities. Modern thermally broken aluminium frames reduce heat transfer through the frame while retaining the slim profiles associated with aluminium window systems. Bowalker installs and replaces aluminium casement windows with energy-efficient glazing, secure multipoint locking and durable powder-coated finishes across a range of RAL colours, with dual-colour options available where supported by the selected system.
Learn More →Natural character and traditional joinery detailing make timber casement windows particularly suited to cottages, period properties and homes where wooden frames complement the existing architecture. Engineered timber can improve dimensional stability compared with traditional solid timber while retaining the natural grain and appearance associated with wooden windows. We install and replace timber casement windows with energy-efficient sealed units, suitable locking hardware and durable microporous paint or stain finishes, combining traditional appearance with modern glazing performance.
Learn More →Double Glazed Casement Windows
Double Glazed Casement Windows
Two panes of glass separated by an insulating cavity allow double-glazed casement windows to improve thermal performance compared with traditional single glazing while retaining the practical ventilation of hinged opening sashes. Compatible sealed units can incorporate Low-E glass, argon-filled cavities and warm-edge spacer bars to reduce heat transfer through the glazing. Bowalker installs and replaces double-glazed casement windows with energy-efficient sealed units, secure multipoint locking and weather-resistant compression seals selected around the window system.
Learn More →Three panes of glass separated by two insulating cavities give triple-glazed casement windows enhanced thermal performance over standard double-glazed units, provided the selected frame system and opening configuration can support the additional glazing weight. Compatible frames and appropriately rated hinges are required to maintain smooth sash operation and consistent compression against the weather seal over the long term. We install and replace triple-glazed casement windows with compatible frames, suitable locking hardware, and accurately fitted weather seals.
Learn More →Combining privacy glazing with hinged opening sashes, obscure glass casement windows provide natural light, practical ventilation and reduced visibility in bathrooms, cloakrooms and overlooked rooms where privacy and airflow are both required. Pilkington Texture Glass offers five privacy levels, from Level 1 for the least obscuration to Level 5 for the greatest, so you can choose the glazing to suit the room and your privacy needs. Our in-house installers install obscure glass casement windows with suitable privacy glazing, secure multipoint hardware and energy-efficient sealed units.
Learn More →The smooth, even translucent finish of satin glass diffuses natural light consistently without the surface texture of patterned obscure glass, making satin glass casement windows a popular choice for bathrooms, bedrooms and privacy-sensitive rooms where a cleaner, more uniform appearance is preferred alongside practical opening ventilation. Combined with a hinged opening sash, satin glazing provides increased privacy and airflow from the same window, without the need for net curtains or blinds. We install and replace satin glass casement windows with secure multipoint hardware, energy-efficient sealed units and accurately fitted compression weather seals.
Learn More →Decorative lead patterns, including diamonds, squares and traditional grid arrangements, combine with hinged opening sashes in leaded glass casement windows, complementing cottages and period properties where decorative glazing contributes directly to the architectural character of the elevation. Maintaining lead pattern alignment across both the fixed frame and opening sash requires careful planning at the survey stage to ensure the decorative design reads consistently when the window is closed. Bowalker installs and replaces leaded glass casement windows with carefully aligned lead patterns, secure multipoint hardware and energy-efficient sealed units.
Learn More →Coloured or decorative glazing combined with a hinged opening sash lets stained glass casement windows add decorative character and controlled ventilation to period properties, entrance areas and feature elevations where decorative glass forms part of the architectural design. Stained glass panels are most commonly positioned in the upper lights of casement windows, displaying decorative colour and pattern prominently whilst the lower opening section provides practical everyday ventilation. We install and replace stained glass casement windows with carefully positioned decorative glazing, secure multipoint hardware and precisely fitted frames throughout.
Learn More →Combining reflective glazing with hinged opening sashes, mirror glass casement windows suit sun-facing and overlooked rooms where glare reduction, daytime privacy and practical ventilation are priorities. Reflective glass can increase daytime privacy when external light levels are higher than internal light levels, while suitable solar-control specifications can also help manage glare and solar heat gain. Our in-house installers install mirror glass casement windows with secure multipoint locking, weather-resistant seals and accurately installed reflective sealed units selected to meet the required light transmission and solar-control performance.
Learn More →Adding a separate internal glazed panel behind an existing casement window improves thermal and acoustic performance without removing the original frame, making secondary glazing a practical solution for period properties, listed buildings and conservation areas where planning requirements restrict replacement windows. Hinged, sliding or removable secondary panels can be configured to maintain practical access to the existing opening sash for ventilation and cleaning. Bowalker installs secondary glazing for casement windows with carefully measured internal frames and glazing specifications selected to help reduce draughts, heat loss and external noise while retaining the existing primary window.
Learn More →Window Brands We Install
Our team at Bowalker is made up of highly skilled, certified window installers and specialists who deliver premium, luxury installations with precision and care. Every window installers work 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, focusing on customer satisfaction and long-lasting performance.
Not sure which brand is right for your home? Talk to our team →
Why Homeowners Choose Bowalker for Casement Windows Installation Services
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
Casement Windows Project Gallery
What Are the Benefits of Installing Casement Windows?
Casement windows combine practical ventilation, modern glazing options and flexible frame designs suitable for both traditional and contemporary properties. When correctly specified and installed, they can incorporate energy-efficient glazing, weather-resistant seals and modern locking hardware while providing straightforward everyday operation.
Provides Flexible Ventilation
Side-hung and top-hung opening sections let you adjust airflow around the room and window configuration.
Supports Thermal Performance
Low-E glazing, insulated frames and compression seals can help reduce heat loss and draughts compared with deteriorated older windows.
Supports Modern Locking Systems
Contemporary casement windows can incorporate multipoint locking and suitable hardware around the sash and frame.
Provides Clear Outward Views
Larger panes and carefully positioned opening sections can maintain broad sightlines and natural light.
Offers Straightforward Operation
Suitable hinges, handles and locking hardware support practical everyday opening and closing.
Provides Flexible Design Options
uPVC, aluminium and timber frames are available with different colours, glazing options and decorative details.
Supports Weather Resistance
Properly specified seals and accurately installed frames can help limit draughts and weather ingress.
Offers Practical Maintenance
Modern frame materials and finishes can simplify routine cleaning and maintenance compared with deteriorated older windows.
How to Get Started With Casement Windows Installation and Replacement at Bowalker
Getting started with casement window installation or replacement at Bowalker begins with a free consultation and measured survey of your existing openings. Our team assesses the property style, window dimensions, frame material, glazing requirements and preferred opening configuration before recommending a suitable casement window specification. We then provide a no-obligation quote and arrange installation with our in-house window fitters.
- Book Your Free Consultation
- Receive Your No-Obligation Quote
- Proceed to Installation
Get In Touch
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Areas we Serve
Bowalker provides professional casement window installation and replacement across Sussex, including Brighton, Hove, Hassocks, Burgess Hill, Haywards Heath, Horsham, Lewes, Uckfield and surrounding areas. Our in-house installation team manages each project from measurement and specification through to fitting and final inspection, providing consistent service across the region.
What Our Happy Customers Say
We have had a front door and side panel installed,Team Tim did a great job and were very professional and knowledgeable. Wouldn’t hesitate to recommend the company and this team to any one !
Simon and Brandon fitted our three windows in our garage > studio conversion and were great through the day. Arrived when they said they would, were very polite, respectful and pleasant people. Found answers to questions we didn’t realise about the installation and though we haven’t yet finished the project the windows are a very exciting and big step forward for us. Would recommend this company and this team without hesitation. Thank you!
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
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.
Meet Our Team
Our team at Bowalker includes fully employed, in-house window installers experienced in casement window installation and replacement. We do not use subcontractors, helping maintain consistent workmanship and accountability from initial measurement through to final inspection. Our in-house installers work with uPVC, aluminium and timber casement systems, carefully setting up frames, glazing, hinges and locking hardware for reliable everyday operation.
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
See Our Work In Action
- Doors
- Rooflight
- Doors
- Windows
Ready To Get Started With Bowalker Casement Windows?
If ageing casement windows are draughty, difficult to operate or no longer providing suitable thermal performance, replacement casement windows can introduce modern glazing, weather-resistant seals and smoother opening mechanisms while complementing your property’s existing style. Bowalker provides a fully managed installation and replacement service with an experienced in-house team and window specifications tailored to your property.
Call 01444 810 111 today to arrange your free consultation and receive a no-obligation quote. From measuring the existing openings and selecting the frame, glazing and opening configuration through to installation and final operational checks, our team manages each stage of your casement window project.
Enhance the comfort, style, and energy efficiency of your home with Bowalker Casement windows
Frequently Asked Questions
What Are Casement Windows?
Casement windows are hinged windows that open from the side or top to provide controllable ventilation and clear outward views. Side-hung casements are among the most common configurations, whilst top-hung sections can provide ventilation through smaller openings. Modern casement windows are available in uPVC, aluminium and timber with double or triple glazing, weather-resistant seals and secure locking systems.
How Long Does Casement Window Installation Take?
Casement window installation takes around two to four hours per window, whilst several straightforward replacements may be completed within one to two days. The exact timeframe depends on the window size, frame material, property access and condition of the existing opening. Our in-house installers complete the fitting, sealing, hardware adjustment and final operational checks before finishing each installation.
How Do You Clean Casement Windows?
Clean casement windows with warm water, mild detergent and a soft microfibre cloth on the glass and frames, removing dirt from corners, seals and the lower frame where debris can collect. Open the sash to clean accessible frame edges and use a soft brush to remove dirt around hinges, locking points and drainage channels. Avoid abrasive pads, harsh chemicals and pressure washers that could damage glazing coatings, seals or frame finishes. Check that hinges, handles and locks operate smoothly after cleaning and remove any debris restricting drainage or sash movement.
How Do You Choose the Right Casement Windows for Your Home?
Choose the right casement windows by considering your property’s architectural style, frame material, glazing performance, opening configuration, ventilation requirements and maintenance preferences. uPVC provides low-maintenance versatility, aluminium offers slimmer contemporary profiles and timber complements traditional or period properties. You can then choose side-hung, top-hung or combined opening configurations based on room layout, ventilation needs and available opening space.
What Casement Window Design Ideas Should You Consider for Your Home?
Consider casement window design ideas such as flush frames for cleaner sightlines, Georgian or leaded glazing for period properties, slim aluminium profiles for contemporary extensions and timber casements for cottages or traditional homes. You can also combine larger fixed panes with opening casements to maximise views and natural light whilst retaining ventilation. Matching frame colours, glazing bars and hardware across related windows can create a consistent exterior appearance.
What Guarantee Do You Provide on Casement Window Installation?
Bowalker provides a 10-year insurance-backed guarantee on qualifying casement window installation and replacement work, offering long-term assurance for our workmanship. Our in-house team completes applicable replacement window installations under FENSA registration (33081), supporting compliance with relevant Building Regulations and professional installation standards.