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Origin Doors

Available in both OW-70 Slimline and OW-80 Premium ranges, the Origin Casement Window combines traditional design, advanced manufacturing and versatile premium grade aluminium for high levels of security and thermal efficiency to complement any type of build.

  • Made in Britain

    Proudly manufactured in the United Kingdom at our Buckinghamshire facility.

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

  • Our doors help your house stay warm in winter and cool in the summer.

  • Police Backed Security

    We’re committed to your safety through compliance and accreditation initiatives.

  • 150 RAL colours

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

  • Unbeatable lead times

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

  • Bespoke

    All Origin products are tailor-made to your requirements by our higly skilled team.

  • Premium quality aluminium

    Find out how our doors benefit from the strength, resilience and versatility of our premium grade aluminium.

  • Low maintenance

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

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.

Sightline Sizes denote frame to glass measurements for casement windowsOW-70
Max Sizes - HeightOW-70
Max Sizes - WidthOW-70
Max WeightOW-70
Up to 50kg
Up to 50kg
Popular ColoursOW-70
7015M, 7016M, 7021M, 9005M, 9007M, 9910M, 9910G and 9910G/7016M (dual colour)
7015M, 7016M, 7021M, 9005M, 9007M, 9910G, 9910M, 9910G/7016M (dual colour), Natural Oak and Golden Oak
Dual Colour OptionOW-70
Georgian Bar OptionOW-70
No - but flat trim can be used to create the same effect
Lead Times Lead times displayed may change without prior notice and will depend on installation availability.
See the most up-to-date delivery times
Popular Colours - Your Lead Time, Not Ours (available in as little as 24‑hours)
Special RAL Colours - 4 Weeks
Popular Colours - Your Lead Time, Not Ours (available in as little as 24‑hours)
Special RAL Colours - 4 Weeks
Colour-Coded GasketsOW-70
Up to 1.2W/m2K
Up to 0.8W/m2K with Aerogel
PAS 24:2016 as standard with Nemesis multi-point lock
PAS 24:2016 as standard with Yale Encloser multi-point lock
Secured By DesignOW-70
Standard - Up to 20 years
Marine Environment - 10 years (frame) & 5 years (hardware)

What to do next?

  1. Find your local installer
    Complete the form
  2. Arrange a consultation with them to discuss your project
  3. Book a convenient date for them to install
  4. Enjoy 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

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