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.
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.
We’re committed to your safety through compliance and accreditation initiatives.
A wide range of colour and finish options ensures that there is a style to suit your home.
Find out how our unbeatable delivery promises can help your project.
All Origin products are tailor-made to your requirements by our higly skilled team.
Find out how our doors benefit from the strength, resilience and versatility of our premium grade aluminium.
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.
- Choose from either the slimline OW-70 or premium OW-80 system.
- The size of your aperture. Your installer will measure this for you.
- Choose how your windows open and the direction they fold in.
- Select your colour scheme, whether that's the same inside and out or different.
- Choose 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.
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 Grey
- Anthracite Grey
- Black Grey
- Jet Black
- Dark Metallic Silver
- Brushed Aluminium
- 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.
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.
- Anthracite Grey
- 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 windows||OW-70|
|Max Sizes - Height||OW-70|
|Max Sizes - Width||OW-70|
Up to 50kg
Up to 50kg
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 Option||OW-70||OW-80|
|Georgian Bar Option||OW-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
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 Design||OW-70||OW-80|
Standard - Up to 20 years
Marine Environment - 10 years (frame) & 5 years (hardware)
What to do next?
- Find your local installer
Complete the form
- Arrange a consultation with them to discuss your project
- Book a convenient date for them to install
- 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
A rustic-styled wooden house given a timeless aesthetic by including a plethora of Origin products
This barn-like building was built from the ground up, with Origin products filling every aperture possible allowing for a uniformed design whilst maintaining the unique and homely style.Read case study
Homeowners give their much-loved home a new lease of life with Origin products
These homeowners had been comfortably living in their home for almost a decade and thought it was high time they renovated the look of their home and gave it some much needed TLC. They put their creative minds to work and started this exciting project by totally revamping their house with a variety of Origin doors and windows. This enabled them to achieve a unique style that was suited to their taste. The whole family were thrilled with the end result.Read case study
A renovation with maximising living space and views in mind
The Collins’ have lived in their home for 13 years and decided in 2018 that it was time to renovate and maximise the space and views to the outdoors. The plans were to extend the kitchen which was originally a large patio area, as well as convert the existing conservatory into a functioning room to become Mr Collins’ office.Read case study
Beautiful Oxfordshire Family Home benefitting from Origin's thin sightlines
This beautiful newly built home in Oxfordshire has an incredible amount of sunlight hours, which adds to the appeal to live in this spectacular house. To really make the most of the natural light, the homeowners specified Origin to their local installer, Panoramic Architectural Glazing. The thin sightlines coupled with the ability to create bespoke heights which exceed the industry standard heights, there was no better choice than Origin.Read case study
Instagram Home Complete with Bespoke Origin Products
Abi and her family completely renovated this stunning countryside home with Origin, creating a wonderful home to be enjoyed all year round.Read case study
Family maximise their space and countryside view with Origin
After a couple of years of living in their home, Denise and her family were ready to embark on a wonderful extension that would provide them with more living space, as well as offer new exquisite touches to their home.Read case study
The Singh’s brightened up their home and workspace with Origin
After living in their property for 2 and a half years, the Singh’s made the decision to renovate their bungalow and create a whole new living space.Read case study
Country home refreshed with Origin products throughout
A stunning country home refreshed with Origin products throughout.Read case study
Inviting the great outdoors in with Origin
The Collins’ lived in their property for 7 years before taking the decision to extend and completely refurbish their home with a suite of Origin products.Read case study
The North’s created a match made in heaven after installing a 3 door set of OB-72 Corner Bi-folding Doors and OW-80 Casement Windows
Buying a property is one thing, but creating a forever home is a completely different dream, and that is exactly what the North’s were looking to achieve when they came to Origin.Read case study
Origin OB-72 Bi-fold Doors, OW-70 Windows and OS-20 Sliding Doors Complete this Cosy Family Home
A lovely family home has recently been completed with Origin Bi-Folding Doors, OS-20 Sliding Doors and a range of OW-80 Windows.Read case study
Origin Helps to Maximise Views for this Nottinghamshire Home
Steve and Jane Williams chose Origin to help renovate their home, allowing them to enjoy more of their stunning view.Read case study
Georgian Bar Bi-Folding Doors and Windows Complete this Couple’s Extension
See how this couple chose to complete their home with a gorgeous extension after moving away from the hustle and bustle of London.Read case study
A New Build Origin Home in the Heart of the Countryside
See how this couple used Origin Doors and Windows to complete their modern countryside home.Read case study
Origin Doors and Windows Create a Wonderfully Cohesive Home
John & Sue chose Origin to create a wonderfully uniform touch to their home, helping give them the harmonious style they had been searching for.Read case study
Origin was the Perfect Choice for this High Spec Development
Father son building team, Bob and Ben built four high spec properties using Origin products throughout, to create eye-catching homes with beautiful views to be enjoyed all year round.Read case study
Bi-fold doors change the way this family use their coastal home
This family added an extension onto their home to make the most of the stunning coastal views that surround them. Origin's bi-fold doors was the perfect choice.Read case study
Modern Meets Traditional with Bespoke Origin Doors and Windows
The Parker family wanted to incorporate a lot of glass into their new property so that they could fully embrace the beautiful countryside surrounding their home.Read case study
The Perfect Home Built From Scratch
Cheryl and Martin wanted the perfect doors and windows to complement their impressive new build property. They needed quality products that would be durable and strong.Read case study
Picturesque Views Maximised with the Origin Sliding Door
The Bakers took on this self build project in Cornwall to create their perfect home. With the help of Origin Doors and Windows, they are now able to enjoy the stunning views surrounding their home whilst enjoying maximised natural light throughout the home.Read case study
Origin was the perfect choice for this home
"Even when sitting inside, we still feel like we're outside. There's so much light, everything is so wide open, it's like being in the garden. It’s completely transformed the whole property, we use it every day."Read case study
A lighter and brighter home in Bude with Origin
This couple renovated their home when they saw the opportunity to create much more light and space in their gorgeous Bude-based home.Read case study
Kitchen extension invites more light into this period property
This conservatory, the couple felt, also prevented a lot of light from coming into the back of the house and generally made the house feel dark and unnatural. So, the couple began their search for a team to help them transform their home into a light and modern space.Read case study
Gable belle, Gable belle, Gable all the way… 🔔
After living in their dark bungalow for more than a decade, the Wrens were certain on one thing: they wanted a lot of natural light in their new home. They knew this would require more glazing but didn’t know exactly where to start.Read case study
Home Extension Complete with Origin Doors and Windows
Bespoke doors and windows maximise the natural light in this Devonshire home and beautifully compliment recent renovations.Read case study
Creating an Infinity Pool Effect with Origin Doors and Windows
Working closely with Freedom Bi-folds, their local Origin partner, Mr and Mrs Chard opted for a 6-door set of bi-folds in a 3+3 configuration, which provided excellent accessibility to the pool from the main house.Read case study
A Full House of Origin Slimline Windows
After moving into their Buckinghamshire property in 2013, the Halls family decided to modernise their home with sleek grey aluminium windows - more specifically, with Origin’s new OW-70 Slimline Window.Read case study
Chic Grey French Doors in West Sussex
After discussing their needs with Benchmark Windows, the accredited Origin Partner, the Janets opted for Origin French Doors with fixed windows either side to create lots of natural light and provide a flexible access onto their patio area.Read case study
Stylish Anthracite Grey Front Door in Essex
Set on a quiet street amongst an array of charming houses, you simply can’t help but notice the impressive graphite grey front door, coupled with matching windows, at Steve and Nikki’s house.Read case study
Kitchen extension framed with Bi-folding Doors
During their time living and working abroad, Jamie and Liz bought their property with the intention of one day returning to the UK and renovating it. After several years soaking up culture and learning new languages, the Parrs’ kept their promise and moved back to the UK; and their homebuilding project began.Read case study
Floor to ceiling views with Origin Windows
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.Read case study
Amplifying Views for this Modern Barn Wedding Venue in Cornwall
A magnificent 5 star wedding venue in Cornwall chooses Origin Bi-fold Doors, French Doors and Windows to maximise on the stunning scenery and space.Read case study
Bringing the very best out of a barn conversion
Niall and his wife live in a beautiful barn conversion. When they bought their house, it was still the original brick barn, but included planning permission for modernisation. So, Niall got to work. With previous experience in construction, he had previously built a Victorian house and carried out various renovations on other properties. However, he had always wanted to carry out a barn conversion - and now he had his chance.Read case study
A Beautiful Garden View, Fit for a Family
For nine years, Drew and his wife Lauren have lived in Bath. Their semi-detached house included a living room, dining room and small kitchen downstairs. However, after having two young children, Henry and Lucy, the couple needed more space for their growing family.Read case study
Blending Contemporary with Traditional
Originally from Lancashire, Michael Baker worked as a pilot so naturally moved around a lot during his career. Now retired, he has spent the last four years living in his property in Wiltshire with his wife. Having initially lived elsewhere and commuting to and from work, they loved the local area where they worked and so the decision to move permanently was natural.Read case study
Gold Standard for Silverwood
Located in beautiful Bridport, Dorset, 'Silverwood' is an investment property owned by Anna George, her husband Jon and their extended family. It was originally purchased as a development project back in early 2016 and was a project Amanda couldn’t wait to get started on.Read case study
Views to Take Your Breath Away
For Ben and Annie Thompson, options for a new home in Bradworthy were limited when they began looking a little over a year ago. Ben is a dairy farmer, working seven-days-a-week with his father, meaning he is on call 24/7 so has to live close to the farm. Unfortunately, there were no properties for sale close by which left the couple with only one option – a new build. They chose to build right next to the farm, for Ben’s convenience, where they have stunning views over fields and the beautiful Devon countryside on their doorstep.Read case study
Couple Return to Home After 44 Years with Origin Bi-Folding Doors
Beth and Jason Cole decided to build an extension when they moved into their "new" home in 2014, as it was a house that was close to their hearts. In fact, they first bought the home in 1970, the year it was built and the year the couple were married.Read case study
Beautiful Barn Given New Lease of Life with Origin
After making the decision to move out of London to raise their young family, Nick and Anna Osborn, bought their 4 bed Aylesbury barn conversion in early 2015. The large, dark and draughty barn had not been touched since the original conversion in 1982, and needed extensive renovation work before the family could move in.Read case study
Origin Help Make it Sixth Time Lucky for the Scott's
Finding the right home to settle down in is not always an easy task, something Sue Scott knows plenty about; “We moved homes five times within a 20 year period before finding this” – Sharon was referring to her dream home which is where she and husband Richard, along with their two children Louis, 17, and Harvey, 14, now live.Read case study
Origin Help Rejuvenate a Traditional Home
After ten years in their Buckinghamshire home, the Tomlin's were ready to replace some of the property’s original doors and windows with new and improved ones that remained true to the look and feel of their traditional property.Read case study
Scouting For a New Home
Winter 2015 saw Origin get involved with an incredible project for a local Scout Group who required aluminium windows and a French door to complete the build of their brand new hall.Read case study
Origin Doors and Windows Complete Major Renovation
A recently refurbished Origin Home opened its doors (and windows) to us last week, giving an insight into their most recent renovation project, which features a largely impressive window and door display, showcasing how they are perfectly complementary in style and design to give the ultimate finish.Read case study
A Beautiful Home Rejuvenated with Origin Windows
After choosing some bi-fold doors two years early, Paul Parker decided to complete his home with 25 new Origin windows keeping his house safe, warm and looking amazing.Read case study
Origin Windows Bring a New Light to London Youth Centre
Origin have recently been involved in an exciting project in East London to fit out the Rainham ROYALS Youth Centre by supplying our aluminium windows, helping maximise the use of space in the roof of the building.Read case study
Origin Shopfront Facelift
Sundaes Gelato, a Plymouth based ice cream parlour, recently opened its doors to the public for the first time after a completing a full shop renovation in an exceptional turnaround, helped by the effective manufacturing capability from Origin.Read case study
The Origin Home: Riverside Views
A couple from Berkshire are now enjoy stunning riverside views thanks to a £170,000 renovation to their riverfront property, including Doors and Windows from Origin. The couple, from Purley on Thames, have created a huge open plan living area with breath-taking views overlooking the River Thames.Read case study
6 Bedroom Mansion Makeover
A Buckinghamshire based property developer transformed a dated bungalow into a deluxe 6 bedroom mansion by completely rebuilding it and introducing premium quality bi-folding doors and windows, manufactured by Origin.Read case study
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.