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Aluminium Casement Windows
At Appley Doors and Windows, we manufacture and supply high-performance aluminium windows from our in-house facility in Appley Bridge, West Lancashire. Whether you're based in Liverpool, Manchester, Wigan, St Helens, Blackpool, North Wales, or anywhere across the North-West, our sleek and secure aluminium windows are built to suit both residential and commercial projects.
From ultra-slim framed designs to large opening configurations, our windows maximise natural light, improve thermal efficiency, and offer superior security. With hundreds of colours and glazing options, we offer fully bespoke aluminium window solutions tailored to your property style and performance requirements.
Slim Aluminium Casement Windows
The Cortizo Casement window provides a slim opening vent of only 50mm, this slim opening vent is better suited to smaller openings where minimal framing is required.
This slim aluminium window sash can be used as a top hung or side hung, it can achieve a maximum side hung sash dimension of 0.95m wide x 1.3m high and a maximum top hung dimension of 1.2m wide x 1.3m high.
The window opens on stainless steel friction stays and an Inline window handle operate the highly secure ESPAG mechanisms. This slimline aluminium system has been tested to the PAS 24 security standard.
Flush Sash Aluminium Windows
Perfect for style-driven projects, our flush sash aluminium windows feature an ultra-slim sash and a seamless, flush exterior. With crisp sightlines and a minimalist profile, they bring a refined, contemporary look to both modern and traditional homes.
Oversized Aluminium Windows
Need bigger openings? Our oversized aluminium windows are built with a robust sash profile that allows for outward-opening windows up to 1.75m wide x 1.8m high, with a maximum sash weight of 100kg. Featuring a combined sash and frame sightline of 89mm, they maintain strength without compromising on style. Heavy-duty stainless-steel friction stays and enhanced locking points come as standard to ensure secure, smooth operation.
For even larger openings, our inward-opening aluminium tilt & turn windows can reach up to 1.2m x 3.5m.
Aluminium Bay Windows
Enhance your space with sleek, modern aluminium bay windows from Appley Doors and Windows. Available in slimline casement or flush sash styles, our bay windows maximise natural light while adding a contemporary edge to your home.
Manufactured in Lancashire, our durable, low-maintenance aluminium bay windows are perfect for homes and developments across the Northwest.
Shaped Aluminium Windows
Aluminium windows aren't limited to squares and rectangles — we can manufacture shaped aluminium windows in a variety of styles, including arched, angled, gable, and circular designs. Whether you're working with a unique architectural detail or want to make a statement, we offer bespoke aluminium windows made to measure for even the most challenging spaces.
Get in touch to discuss your shaped window design and we'll help bring it to life with precision-engineered aluminium.
Bifold Windows
Bifold windows are a stylish and practical way to open up your space — perfect for kitchens, garden rooms, or serving hatches. They fold back neatly to create a fully open aperture.
Built using our slimline aluminium bifold door system, you get sleek sightlines, smooth operation, and all the benefits of modern energy-efficient glazing.
Aluminium Heritage Windows
Our slimline aluminium heritage windows combine traditional styling with the performance of modern glazing. Ideal for period properties, art deco renovations, or industrial-style interiors, they replicate the look of classic steel windows with sleek, thermally efficient aluminium frames.
Choose from a range of authentic designs, including Art Deco and industrial styles, with slim sightlines, traditional hardware, and a premium finish built to last.
Aluminium French Casement Windows
Enjoy uninterrupted views and wide openings with our elegant French casement aluminium windows. Designed with two outward-opening sashes and no fixed mullion, they offer a clear, full-width opening—perfect for maximising airflow and natural light.
Available with our ultra-slim 50mm sash, these windows combine minimalist style with impressive thermal performance, matching the efficiency of our standard casement options.
Aluminium Sliding Windows
The Cor Vision and 4900 HI sliding door systems can also be adapted to create sleek, high-performance sliding aluminium windows.
Ideal for spaces where inward or outward opening is impractical, these sliding windows glide effortlessly on durable tracks and can be configured at larger sizes than traditional window types—offering unobstructed views, improved airflow, and a contemporary finish.
Corner Aluminium Windows
Appley Doors and Windows are specialists in bespoke aluminium glazing solutions, including frameless glass-to-glass corner windows that maximise natural light and provide uninterrupted panoramic views.
We use structural glass and precision-applied silicone to bond the corners seamlessly, delivering a minimalist finish with no bulky framing — perfect for contemporary extensions, garden rooms, and open-plan spaces.
Aluminium Open Corner Windows
Create seamless 90° openings with our open corner aluminium sliding window systems — ideal for contemporary architecture and panoramic living spaces.
Open corner windows allow both frames to slide away from the corner, completely removing the barrier between inside and out.
Colour Options
Available in a wide range of high-quality finishes to suit any home style, choose from over 450 durable finishes, including:
Made-to-Measure Aluminium Windows
At Appley Doors and Windows, every aluminium window is made to measure — tailored precisely to your space, style, and performance requirements. Whether you're matching existing architecture or designing something bold and modern, our bespoke window solutions give you total design freedom.
From slim casement windows to large-format glazing and shaped aluminium frames, we manufacture to your exact specification — ensuring a perfect fit and finish every time.
Why Choose Appley Doors and Windows?
At Appley Doors & Windows, we're committed to delivering high-quality aluminium and PVCu windows and doors, backed by expert craftsmanship and outstanding customer service. Whether you're a homeowner, builder or commercial developer, we provide bespoke glazing solutions designed to stand the test of time.
Why our customers choose us:
From stylish aluminium bifold doors and Cor Vision sliding doors to PVCu windows, commercial doors and curtain walling, we're proud to deliver products that combine performance, quality and modern design.
Frequently Asked Questions
Casement windows open outward on hinges and can be hinged on the side (side-hung) or top (top-hung), offering excellent ventilation and ease of use.
When choosing between aluminium and uPVC doors, it's important to understand the differences in performance, style, and long-term value. Here’s how aluminium doors compare to uPVC:
| Feature | Aluminium Doors | uPVC Doors |
|---|---|---|
| Durability | 30+ years with minimal maintenance. Resists warping, cracking, and corrosion. | Around 20 years. Can become brittle or discoloured over time. |
| Design & Aesthetics | Slim, modern frames with large glass areas. Ideal for contemporary properties. | Thicker profiles, fewer colour options. More suited to traditional styles. |
| Strength & Security | High strength for larger openings and advanced hardware. | Lower structural rigidity. May flex or misalign over time. |
| Thermal Efficiency | Excellent when thermally broken. U-values as low as 1.0 W/m2 with triple glazing. | Naturally insulating but varies by profile and glazing. |
| Maintenance | Low-maintenance powder-coated finish. No warping, peeling or fading. | Easy to clean but may discolour or degrade with UV exposure. |
| Sustainability | Fully recyclable and eco-friendly when recycled. | Recyclable but less sustainable in production. |
| Cost | Higher upfront investment with long-term value. | Lower cost initially but may need replacement sooner. |
Stocked colours:
Available on request:
Lead times depend on the finish and configuration:
All windows are manufactured at our factory in Appley Bridge, Lancashire, ensuring efficient production and delivery.
Aluminium windows can be supplied with system extruded cills or we can provide bespoke aluminium pressings.
Cortizo Casement Window Limits:
Yes — our aluminium window systems can be internally or externally beaded, depending on your preference.
Yes — aluminium windows are highly thermally efficient. Oue system includes a polyamide thermal break to reduce heat transfer and improve insulation.
The Cortizo casement windows achieve U-values as low as:
Yes, when supplied with the appropriate hardware.
Our Cortizo Casement aluminium window system is rigorously tested to meet the highest standards of thermal performance, weather resistance, and security:
The cost of aluminium windows depends on several factors, including the number of sashes, size, configuration, and glazing specification. Prices start from £180 including VAT.
All our residential products come with a 10-year manufacturing guarantee on the frame as standard.
For commercial products, we offer a 1-year guarantee, with the option to extend coverage through a tailored commercial maintenance package.
For full details, please refer to our Warranty Document. For ongoing care, contact us to learn more about our maintenance options.
Wipe with a soapy, non-abrasive cloth. Avoid harsh chemicals. Microfibre cloths work well.
You can enhance your casement windows with a range of specialist glazing options, tailored to improve comfort, energy efficiency, and privacy:
Yes — every window, bifold, sliding door, or curtain wall system is custom-made to your exact project requirements.
Our factory is in Appley Bridge, West Lancashire — conveniently located near Greater Manchester.
From our base in Appley Bridge, West Lancashire, we manufacture and supply high-quality aluminium doors and windows to homes and trade customers across the North West and surrounding areas, including:
Whether you're a homeowner, builder, or architect, we're proud to deliver expertly crafted aluminium doors and windows across the region.