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Origin Doors

Aluminium Casement Window

Enjoy incredible thermal efficiency with our bespoke and sleek aluminium casement windows

Also known as hinged windows, our Aluminium Casement Windows combine traditional design, advanced manufacturing and versatile premium grade aluminium. This ensures high levels of security and exceptional thermal efficiency for any build. Whether you choose our Slimline or Premium range - both types of casement windows offer an industry-leading guarantee of up to 20 years. Fully bespoke - you can choose between a huge range of designs and configurations. With a flush casement design, they provide a practical and aesthetically stunning addition to your home.

  • Manufactured in the UK

    Proudly manufactured in the United Kingdom at our Buckinghamshire facility.
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  • Up to a 20 year guarantee

    Discover our industry leading guarantees for complete peace of mind.
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  • Thermal performance

    Our windows help your house stay warm in winter and cool in the summer.
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  • Police backed security

    We’re committed to your safety through compliance and accreditation initiatives.
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  • 150 RAL colours

    A wide range of colour and finish options ensures that there is a style to suit your home.
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  • Unbeatable lead times

    Find out how our unbeatable delivery promises can help your project.
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  • Bespoke

    All Origin products are tailor-made to your requirements by our highly skilled team.
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  • Premium quality aluminium

    Find out how our windows benefit from the strength, resilience and versatility of our premium grade aluminium.
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  • Low maintenance

    Our expert engineering allows you to focus on enjoying the products rather than taking the time to maintain them.
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Bespoke to you…

No home is the same, each having its own unique character. Why should your windows be any different? Our casement windows are made bespoke to suit your needs.

  • SystemChoose from either the slimline OW-70 or premium OW-80 system.
  • The size of your aperture. Your installer will measure this for you.
  • ConfigurationChoose how your windows open and the direction they fold in.
  • Select your colour scheme, whether that's the same inside and out or different.
  • Handle modelChoose from a selection of stunningly designed handles from our ranges.

Open your home, your way…

Our Casement windows can feature left, right or top openers, and can be specified as a side hung, top hung or dummy sash – or a combination of all of these to suit your needs and your windows' desired function.

Because everything we do is bespoke, we can manufacture your window in a configuration that works for your home. This can include a combination of different openers and fixed frames, and thanks to an ultra-slim aluminium profile, the OW-70 can offer the some of the slimmest yet most energy efficient windows on the market today, so you can be assured of the best view of the world outside your window.

Styles tailored to your home…

For an added touch of classic yet contemporary elegance, we offer the option of adding Georgian bars to your Casement windows. Right on trend, this style is often referred to as a steel look, and can be styled however you choose – horizontally, vertically, or both, based on your preference.

OW-80 Casement Window

A truly unique window with an industry-first internal and external flush casement, the OW-80 Casement Window will not disappoint.

Completely bespoke, OW-80 casement windows can be manufactured in a huge array of configurations. With large maximum sizes, it also offers the option to couple windows next to each other to ensure that we have a window solution for any size aperture. Individual side hung casement windows on the OW-80 can be made up to 1,800mm in height by 1,000mm wide.

Handle options

Whether a premium metallic or one of Origin's industry-unique colour-coordinated options, you can be sure of a contemporary handle which offers the same faultless performance as the window itself – and you can colour-code the gaskets to match.

  • Slate GreySlate Grey
  • Anthracite GreyAnthracite Grey
  • Black GreyBlack Grey
  • Jet BlackJet Black
  • Dark Metallic SilverDark Metallic Silver
  • Satin GreySatin Grey
  • Brushed AluminiumBrushed Aluminium
  • ChromeChrome
  • WhiteWhite
  • GoldGold
  • Also available in 150 RAL colours to complement your window colour

OW-70 Casement Window

Equally sleek and contemporary, the OW-70 Casement Window may not offer as large individual maximum sizes, but it does offer ultra slim sightlines of just 65mm – providing a modern finish for any home, and like the OW-80, can be coupled to other windows to make up a large overall configuration. Maximum dimensions of 1,400mm in height and 950mm in width on the side hung window.

Handle options

Like the window, the handles are made from aluminium, but also feature a Hardex Electro finish for complete durability. Therefore, with the OW-70, you're guaranteed a handle that offers flawless operation, outstanding quality and an exceptional finish. For a colour­coded finish, our offset handle (used on the OW-80) can help create a unique look.

  • Brushed (H-094)Brushed
  • Anthracite Grey (H-094)Anthracite Grey
  • Chrome (H-094)Chrome
  • Gold (H-094)Gold
  • Satin Grey (H-094)Satin Grey
  • Silver (H-094)Silver
  • WhiteWhite
  • Also available in 150 RAL colours to complement your window colour

Casement Window specification…

With elegant and timeless design, our flush casement windows are designed to last the test of time. Available in multiple configurations, you can design a window that is not only stunning but suits your practical needs.

 OW-70OW-80
SightlineOW-70
65mm
OW-80
91mm
U-ValueOW-70
Up to 1.2W/m2K
OW-80
Up to 0.8W/m2K with Aerogel
Secured By DesignOW-70
OW-80
GuaranteeOW-70 & OW-80
Standard: Up to 20-years
Marine Environment: Up to 10-years (frame); up to 5-years (hardware)

What to do next?

  1. Find your local installerFind your local installer Complete the form
  2. Arrange a consultation to discuss your projectArrange a consultation with them to discuss your project
  3. Book a convenient date for them to installBook a convenient date for them to install
  4. EnjoyEnjoy your home's new lease of life

Here at Origin, our vision is to transform the way families enjoy their home - from inside to out…

Explore our Case Studies

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    This grand country home bought to life by Origins Soho products in a dark olive green…

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    Sarah and John had lived in their beautiful Kent property for almost a decade before deciding to build a garden room that they could use all year.

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  • Amplifying Views for this Modern Barn Wedding Venue in Cornwall

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  • A Beautiful Garden View, Fit for a Family

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  • The Origin Home: Riverside Views

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  • 6 Bedroom Mansion Makeover

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Explore our range of windows

Whether you’re planning a replacement, renovation or a new build, we have a range of window types and configurations available to suit your desired aperture. Whether it’s a Bay, Casement, Fixed, Bi-folding, French or Gable window, each type is guaranteed to deliver smooth, flawless and effortless operation as it is made using premium-grade aluminium. Every aspect is completely tailored, including your size and colour scheme.

OW-70 slimline window