uPVC Windows by Ultraglaze

With ultra-slim sightlines and a clean, modern aesthetic, our superior range of uPVC Casement Windows perfectly combines style and performance. Designed to enhance the beauty of any property, these windows offer exceptional security, outstanding thermal efficiency, and long-lasting durability.

Available in either ovolo or chamfered sash profiles, they provide the flexibility to suit both contemporary and traditional homes — delivering a flawless finish that looks as good as it performs.

Our range of windows can be configured with multiple unique features to truly make your windows , your own.

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Not just any uPVC window system.

Our uPVC Casement Windows are designed with innovation and performance at their core.

Built using a multi-chambered profile, these windows provide superior insulation by trapping pockets of air within the frame, helping to achieve impressive A+ energy ratings and keeping your home warm all year round.

Security comes as standard, with advanced multi-point locking systems that secure the window at several points around the frame for maximum protection and peace of mind.

Combined with high-quality double or triple glazing, our casement windows deliver outstanding energy efficiency, noise reduction, and strength without compromising on style.

Chamfered

A chamfered sash features a sharp, angled edge design with a typical 70mm frame width, offering a clean, modern look with excellent strength and thermal efficiency.
Ovolo Retro Detail

An ovolo sash features a softly curved, sculpted edge design with a typical 70mm frame width, adding a touch of classic elegance and traditional character while maintaining modern strength and energy efficiency.
Fully Mechanical Joints

We offer fully mechanical chamfered joints as a bespoke service, providing an authentic timber-like appearance with precision-engineered detailing for a premium, handcrafted finish.
Optional Graf Weld

Graf Weld on UPVC windows represents a pinnacle of modern fenestration technology, utilizing advanced Graf welding machinery to create seamless, invisible corner joints that eliminate the visible seams and grooves left by traditional 45-degree mitre welds.
Secured by Design

Secured by Design products are designed with exceptional security features and confirmed as meeting the requirements of the Association of Chief Police Officers
Reversible Window

Rotating a full 180°, this window style is ideal for high-rise applications and hard to reach areas as it can be safely cleaned from the inside
Tilt & Turn Window

Perfect as a fire escape, the ‘open in’ style offers great options for cleaning from within as well as maximising ventilation.
Bi-fold Window

Popular in conservatories and orangeries, bi-folding windows fold back to one side of the opening for uninterrupted views.

Astragal or Georgian Detailing

Astragal bars are elegantly applied to the internal and external surfaces of the glazing, creating the authentic appearance of traditional multi-pane period windows.

These bars are fixed onto a single sealed glazing unit, artfully simulating the division of multiple smaller panes to deliver a timeless, classic aesthetic. For an even more refined heritage look, astragal bars are also available in a Georgian detail.

Attention to detail

Aged Antique Leadwork

Aged antique leadwork is available on our UPVC windows, expertly applied to evoke the charm of historic glass.

This premium decorative feature is offered in a variety of authentic configurations, including heritage rectangles and classic diamond grids, seamlessly integrated within the sealed glazing unit to deliver timeless elegance with the durability and low maintenance of modern UPVC.

Colour-Matched Ventilation

We offer two vent options to comply with Document F of the Building Regulations. Both vents are colour-matched to complement the aesthetics of our sash windows.

Our exclusive modular vent enables any welded sash window over 775mm wide to meet the new requirement of achieving 8000 EA airflow in a single window. If a specific equivalent area (EA) rate is required

Functional & energy efficient

“A+14” Energy Rated

Our advanced window system achieves an impressive A+14 Window Energy Rating (WER) with double-glazed sealed units, delivering exceptional thermal performance straight from the standard configuration.

At the heart of this efficiency is our unique multi-chamber profile design, where precisely optimized chambers trap warm air to form a powerful thermal barrier within the frame—effectively blocking cold, draughts, and moisture for superior insulation and comfort.

For even greater performance, upgrade to triple glazing and unlock U-values as low as 0.9 W/(m²·K) and an outstanding A+25 WER—among the best in class for energy efficiency.

Peace of mind comes standard: all locking systems are backed by a 10-year guarantee against mechanical failure.

Planning & Conservation for uPVC?

As homeowners increasingly value the timeless elegance of traditional sash windows alongside modern performance, demand for slim uPVC casement windows is rising in premium developments and historic properties alike.

In conservation areas, projects often require bespoke details to preserve architectural character. Historically, planners rejected uPVC replacements for timber sashes—but our advanced systems change that.

Available with authentic wood-effect foils and dummy run-through sash horns on the external sash, our windows are designed to meet stringent local planning requirements while delivering the durability, security, and energy efficiency of high-performance uPVC.

Compliance guaranteed

As a trusted installer of premium windows, we view quality as an ongoing commitment that demands constant attention and care.

Quality Hardware you can trust

Shootbolt Locking

Our windows are equipped with shootbolt locking as standard, delivering robust, multi-point security to keep your home protected year-round.
Stainless Steel Hinges

Our windows feature stainless steel hinges as standard, engineered for exceptional durability, corrosion resistance, and smooth operation.
2-Stage Vent Lock

Our windows are fitted as standard with a 2-stage vent lock, providing secure night ventilation and child-safe restricted opening for enhanced safety and peace of mind.
Hinge Protection

Optional upgrade: Anti-jemmy hinge protection - stainless steel guards that reinforce hinge security, significantly increasing resistance to forced entry and providing ultimate peace of mind.
Heritage Handles

Heritage-style window handles—elegantly crafted to replicate classic period designs, available in a choice of premium finishes .
Fab & Fix Handles

Fab & Fix handles—premium, British-manufactured hardware renowned for its superior strength, ergonomic design, and extensive range of styles and finishes.

Woodgrain colour options

Our uPVC Casement Windows are available in standard woodgrain colourways, including dual-foil options, providing a wide range of choices to complement any home style.

Each window is finished using high-quality Renolit Exofoil, a premium material that delivers a durable, weather-resistant surface with a glossy, realistic timber effect.

This finish not only enhances the aesthetic appeal of your windows but also ensures long-lasting performance with minimal maintenance.

The realistic woodgrain texture captures the character and charm of traditional timber, bringing warmth and elegance to your property.

For a truly personalised touch, you also have the option to select a bespoke colour of your choice, allowing your windows to reflect your individual style while maintaining their classic sash window appearance.

Don’t see it , rest-assured we can manufacture it.

Premium Glass Options as standard

Flemish

Level 1
Minster

Level 2
Sycamore

Level 2
Stippolyte

Level 4
Arctic

Level 5
Cotswold

Level 5

French Windows

French windows are defined by their timeless configuration—a pair of casement windows that open outward from the centre.

This classic style can be seamlessly incorporated into any of our premium window profiles, giving you unparalleled design flexibility.

Whether you prefer sleek modern lines, traditional aesthetics, or heritage-inspired detailing, French windows offer a versatile and elegant solution to enhance light flow, ventilation, and visual appeal in any room.

Bow and Bay Windows

Bow and bay windows transform your home by adding character, space, and abundant natural light.

These elegant features create a stunning focal point both inside and out, while bow and bay windows deliver exceptional kerb appeal, seamlessly enhancing the architectural beauty and interior ambiance of any property.

Tilt & Turn Windows

Ideal for larger window installations, our uPVC tilt & turn windows provide exceptional versatility with dual opening modes:

Full Side Opening: Swing the window inward for complete access—perfect for fire escape routes and maintenance
Tilt Ventilation: Angle the top of the window inward for secure, controlled airflow

Operation is intuitive: simply adjust the handle position to select your preferred mode.

Uncompromising Security Our tilt & turn windows meet the highest UK standards:

PAS24 Certified for enhanced security performance
Secured by Design Approved for police-recognised crime prevention

This combination delivers practical functionality, safety compliance, and total peace of mind for residential and commercial projects.

Pick from any RAL Colour

Our uPVC Windows can be spray finished in any RAL Colour.

This process provides a durable, long-lasting surface that resists fading, chipping, and weathering while offering a smooth, even appearance.

With hundreds of RAL shades to choose from — including matte, gloss, and textured options — you can perfectly match your windows to your property’s style or branding.

Still not sure about our uPVC Casement Windows?

This FAQ section focuses on our Casement windows, providing detailed information on their design, cost, energy efficiency, and value.

Whether you're renovating your home or just browsing window options, our responses are designed to give you the crucial details to help you decide.

Still not sure?
Give us a call.

A casement window is a hinged window that opens outward like a door, providing full ventilation and unobstructed views. Ideal for modern homes, they offer excellent airflow and are operated by a simple crank handle.
We can use any market-leading uPVC Window Profile on your project.

Just because it’s not on here , doesn’t mean you can’t have it!
Yes—Our casement windows achieve U-values as low as 0.93 W/m²K with triple glazing. Multi-chambered profiles and advanced sealing reduce heat loss by up to 30% compared to standard windows.
Virtually maintenance-free. uPVC casement windows require only occasional cleaning with warm soapy water.
No painting or repainting needed—guaranteed for 10 years against discolouration.
Absolutely. Choose from 20+ frame colours, multiple glazing options, hardware finishes (chrome, gold, black), and glazing patterns.
We can offer any bespoke size.
Yes, our certified installers provide full-service installation across the UK. FENSA registered with 10-year insurance-backed guarantees on both product and workmanship.
Of course.
Contact our expert team for free consultations, home surveys, and 3D visualisations.
We'll guide you through options and provide no-obligation quotes tailored to your property.

Download our brochure…

Download our brochure to explore the full range of our exquisite window designs, detailed specifications, and discover how our products can enhance your home's beauty and efficiency.

Spectus Legacy Brochure

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