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Casement window range in uPVC or Aluminium

The most popular window style fitted to British homes for centuries. Casement windows can be opened wider than any other type, allowing for maximum ventilation. They also require the fewest panel-dividing strips (known as muntins), and so provide the best views and let the natural light in.

Available in uPVC and aluminium, and in a range of colour and customisation options, replacement casement windows make a big improvement to your home. Whether you are replacing a different style or simply want to improve your home’s performance with double glazing or comfort glass windows, it’s easy to get going on the design process.

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    Chartwell green uPVC casement window

    Thermally Efficient

    A multi-chamber system improves energy efficiency thanks to the use of larger reinforcement chambers

    Easy Hinge

    Hinged either on the left, right, or from the top, choose the option that suits your rooms ventilation requirements

    Additional Features

    Clip-on Georgian bars, decorative glass and run-through sash horns are available

    Stormproof sash

    The stormproof sash wraps round the front casement of the frame to prevent any window driven rain from reaching the sealing system

    What is a casement window?

    As casement windows have no meeting rail, there are several opening mechanisms, both horizontal and vertical. Casement windows are attached to the frame by one or more hinges generally to the left or right side (although occasionally to the top); open or closed the window is permanently bolted into the space, unlike the vertical sash design. This makes them an ideal and secure replacement window that can fit any space.
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    What a casement window can do

    Wide opening

    Casement windows provide easy and effective ventilation.

    Versatile window design

    Casement windows fit perfectly into any home regardless of its style and age.

    Better thermal performance

    Our windows are made to fit perfectly from insulating materials and easily achieve A ratings.

    Exceptional home security is locked in

    Featuring locks embedded into the frame, casements add an extra level of security as they can't be picked or drilled from the outside.

    Less frame, more view

    Casement windows have no obstructive sections and can have narrow frames in aluminium.

    10 years’ product guarantees

    All new doors carry a standard guarantee for 10 years on fit, function and finish.

  • Materials
  • Colours
  • Glazing
  • Frame Options
  • Furniture
  • Materials

    Colours

    Our uPVC and aluminium windows are available in a wide range of colours, including more than 150 RAL colours and a range of authentic wood grain finishes. Dual colour options with contrasting exterior and interior frames are also available.

    uPVC casement window colours

    White

    White

    Clotted Cream

    Clotted Cream

    Pearl Grey

    Pearl Grey

    Chartwell Green

    Chartwell Green

    Elephant Grey

    Elephant Grey

    Slate Grey

    Slate Grey

    Slate Grey Grained

    Slate Grey Grained

    Basalt Grey

    Basalt Grey

    Anthracite Grey

    Anthracite Grey

    Anthracite Grey Grained

    Anthracite Grey Grained

    Black Brown

    Black Brown

    Steel Blue

    Steel Blue

    Racing Green

    Racing Green

    Ruby Red

    Ruby Red

    Turner Oak

    Turner Oak

    Irish Oak

    Irish Oak

    Golden Oak

    Golden Oak

    Rosewood

    Rosewood

    Mahogany

    Mahogany

    Walnut

    Walnut

    Dark Oak

    Dark Oak

    Aluminium casement window colours

    White

    White

    Ivory White

    Ivory White

    Light Cream

    Light Cream

    Mid Cream

    Mid Cream

    Green Grey

    Green Grey

    Grey

    Grey

    Smoke Grey

    Smoke Grey

    Warm Grey

    Warm Grey

    Shadow

    Shadow

    Slate Grey

    Slate Grey

    Anthracite Grey

    Anthracite Grey

    Midnight Grey

    Midnight Grey

    Deep Black

    Deep Black

    Dark Brown

    Dark Brown

    Chocolate Brown

    Chocolate Brown

    Warm Red

    Warm Red

    Ocean Blue

    Ocean Blue

    Mid Green

    Mid Green

    Any RAL Colour

    Any RAL Colour

    Glazing

    Our uPVC and aluminium windows come with EcoMAX Glass™, one of the most sustainable glass units on the market. You can also choose Comfort Glass for higher levels of thermal efficiency, security and noise reduction, or decorative glazing, such as stained glass, floral patterned, or modern etched glass.

    Frame Options

    Choose the perfect profile for your finished window

    Choose from chamfered, a contemporary, straight-edged style, ovolo, a more traditional, decorative finish or flush sashes that blend with the external face of the window.

    Ovolo Frame

    Ovolo Frame

    Flush Sash Frame

    Flush Sash Frame

    Chamfered Frame

    Chamfered Frame

    Furniture

    Stylish furniture to complete your windows

    A range of window furniture options adds a personal touch to your windows. Choose from elegant designs for handles and window restrictors and pegs.

    Furniture Handle Options

    Window Handle

    Window Handle

    Monkey Tail Handle

    Monkey Tail Handle

    Pear Drop Handle

    Pear Drop Handle

    Furniture Colour Options

    Black Finish

    Black Finish

    Brass Finish

    Brass Finish

    White Finish

    White Finish

    Chrome Finish

    Chrome Finish

    Steel Finish

    Steel Finish

    Made to measure casement windows

    Depending on the material you choose and the orientation of the window’s panels and hinges, casements complement heritage homes or modern builds.

    They can be configured to provide optimum ventilation as well as privacy. Frosted or etched glass windows are ideal for replacement bathroom windows or rooms overlooked by neighbouring houses.

    We offer both bevelled (flat) and ovolo (curved) frames, and you’ll be able to choose from our window furniture collection for the finishing touches to complete the design. We also offer decorative glazing, including stained glass, leaded glass and patterned glass.

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    Interior view of uPVC casement window
    Green casement windows

    uPVC casement windows in a range of styles

    The least expensive material thanks to its modern manufacturing, uPVC windows suit any homeowner’s budget without compromising performance. A multi-chambered frame profile stops the warmth from escaping through the layered system. Able to last up to 35 years, uPVC is a maintenance-free window choice that won’t rot, fade or crack, even when exposed to harsh weathers.

    We offer flush uPVC casement windows in a variety of colours, including grey, Chartwell Green or white. We also offer a range of wood effects, replicating timber window frames; a perfect upgrade for older properties, they can also add a touch of character to modern homes too.

    uPVC Casement Windows

    Aluminium casement windows with slimline frames

    Aluminium windows have thinner frames than other windows, increasing available light. A naturally insulating material, it won’t compromise on its thermal performance. A multi-layered framework reduces heat transfer. Aluminium is exceptionally robust, able to withstand even the toughest forces and the harshest weather.

    Aluminium has a smooth finish, and is offered in more than150 RAL colours. We also offer woodgrain finishes to retain traditional character but with modern aluminium window benefits.

    Upgrading to aluminium casement windows is a sure way to add value to your home. They’ll last for at least 45 years, without degrading, rusting or fading; they’re also maintenance-free.

    Aluminium Casement Windows
    Black aluminium casement window
    Large grey aluminium casement window

    A+ rated energy-efficient casement windows

    Our highest-rated double glazed windows have an energy A+ rating (the highest there is). So, you can be sure that they’ll keep the inside of your home at an optimum temperature.

    Efficiency is a result of careful design and engineering. Our windows feature new performance-oriented technologies including multi-chambered window profiles,, argon-filled inter-pane areas, low-e glass that’s specially treated to reflect heat back into a room, and the newly patented Warm Edge Spacer Bar.

    In a commitment to sustainability, we include almost 100% biodegradable EcoMAX Glass™ as a standard fitment on all uPVC and aluminium products. We also offer Comfort Glass that is designed to outperform triple glazing thanks to the inclusion of a tough laminated layer and an effective low-e coating.

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    Excellent casement window security

    Casements are difficult to break into as their hook-shaped locks are embedded within the frames themselves and can’t be picked or drilled from the outside.

    Our range of window security features includes multi-point locking systems, multi-layered beaded frames that resist harsh forces, high-quality handle locks and shoot bolt locks. Our aluminium windows are tested to PAS 24.

    We can also fix uPVC window hardware into steel reinforcements and incorporate toughened glazing. A range of additional locking mechanisms can also be incorporated into our window styles if security is your greatest concern.

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    uPVC casement window handle

    Compare window styles

    Bay Windows

    Bay Windows

    • Available in high-performance uPVC or aluminium
    • U-values as low as 0.8 W/m2K
    • Multi-point locking system

    Popular Colours:

    White
    Elephant Grey
    Anthracite Grey Grained
    Black Brown
    Heritage Windows

    Heritage Windows

    • Made from uPVC to replicate timber
    • Achieve A++ energy ratings
    • Multi-point locking system

    Popular Colours:

    No. 10 Black
    Eclectic Grey
    Corse Lawn
    White
    Tilt and Turn Windows

    Tilt and Turn Windows

    • Available in high-performance uPVC or aluminium
    • U-values as low as 1.0 Wm2K
    • Multi-point locking system

    Popular Colours:

    White
    Black Brown
    Anthracite Grey Grained
    Elephant Grey
    uPVC Sliding Sash Windows

    uPVC Sliding Sash Windows

    • uPVC authentic timber-alternative sash window
    • U-values of 1.4 W/m²k or lower
    • Multi-point locking system

    Popular Colours:

    White
    Black Brown
    Anthracite Grey Grained
    Elephant Grey
    uPVC Flush Sash Casement Windows

    uPVC Flush Sash Casement Windows

    • uPVC authentic timber flush sash window
    • U-Values as low as 1.3 W/m2K
    • Multi-point locking system

    Popular Colours:

    White
    Anthracite Grey Grained
    Elephant Grey
    Black Brown
    Bespoke Windows

    Bespoke Windows

    • Available in high-performance uPVC or aluminium
    • U-values as low as 0.8 W/m2K
    • Multi-point locking system

    Popular Colours:

    White
    Deep Black
    Anthracite Grey
    Smoke Grey
    uPVC Windows

    uPVC Windows

    • Robust and durable frames
    • Available in seven styles
    • 20 years life expectancy, maintenance free

    Popular Colours:

    White
    Anthracite Grey Grained
    Black Brown
    Elephant Grey
    Aluminium Windows

    Aluminium Windows

    • Minimalist frames and sightlines
    • Available in four styles
    • Over 30 years life expectancy, minimal upkeep

    Popular Colours:

    Deep Black
    Anthracite Grey
    Smoke Grey
    White

    Your Window and Door Journey with SEH BAC

    Replacing your windows and doors is easy.

    Choose the right windows and doors

    Fill out a form online or visit one of our 10 showrooms to see our range of high-quality windows and doors up close and speak to our expert team for any advice on materials, styles, colours, energy efficiency and glazing. Once you are happy with your choice, we’ll provide you with a free no-obligation quote.

    Place your order with us

    When you want to go ahead with your order, the details have been approved, and we have received your order deposit, our administration team will provide your contract to a surveyor.

    Your surveyor assessment

    The surveyor will contact you to arrange a date that is convenient to come to your home and review the project scope, take accurate measurements and discuss any other matters that need to be considered. We will then confirm the surveyor’s assessment.

    Confirm an installation date

    Our installation department will contact you to arrange a date for your window and/or door installation and your products will be ordered and manufactured, using cutting-edge techniques and industry-leading materials.

    You're ready for your installation

    On the day, our skilled team will arrive at the agreed time to install your products, ensuring minimal disruption. They’ll explain the locking and opening systems and share maintenance tips to keep your products looking brand new. Once your installation is complete, we will contact you to confirm that everything has been finished.

    Two people who identifies as men Installation windows.

    FAQs

    How much will new windows cost?

    Thermally sound, industry-accredited custom-made windows must be individually priced to take into account manufacturing to size and any features you wish to specify. We offer a range of finance options to spread the cost of new windows. You can read more about what affects the price of double glazed windows on our site.

    How do I know if my windows need replacing?

    There are always obvious signs like poor fit, rot in wood, loose fittings, and inconsistent lock operation, but sometimes it’s just time for a change. New windows can have a big impact on the outward appearance of your home. See our blog for more on this.

    Which window material is best?

    All our windows are designed for visual appeal as well as security, thermal efficiency and durability. Complete with industry-leading and highly accredited hardware, any of our award-winning replacement windows could transform your home. Read more

    What is A rated double glazing?

    Energy efficiency is often the top priority and it’s no wonder as the bills keep rising. The British Fenestration Rating Council (BFRC) rates window energy performance and publishes results to help you decide which windows are best for you. Read more.

    Begin Your Project

    Get your free quote – with no-obligation to buy. Simply fill in the online contact form below to get started:







      By submitting your details you confirm that you agree to the storing and processing of your personal data by SEH BAC as described in the privacy statement.

      This site uses Akismet to reduce spam. Learn how your comment data is processed.

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      Here at SEH BAC, we’re proud to have won many prestigious awards for our products as well as our work in the community:

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