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skip to main contentThe Origin Slimline Window (OW-70) is our slimmest window yet, combining strength with sleek design to create the finest aluminium window on the market today.
Proudly manufactured in the United Kingdom at our Buckinghamshire facility.
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Discover our industry leading guarantees for complete peace of mind.
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Our doors help your house stay warm in winter and cool in the summer.
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We’re committed to your safety through compliance and accreditation initiatives.
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A wide range of colour and finish options ensures that there is a style to suit your home.
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Find out how our unbeatable delivery promises can help your project.
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All Origin products are tailor-made to your requirements by our higly skilled team.
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Find out how our doors benefit from the strength, resilience and versatility of our premium grade aluminium.
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Our expert engineering allows you to focus on enjoying the products rather than taking the time to maintain them.
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The main difference between OW-70 and OW-80 is the way that they look.
OW-70 offers the slimmest sightlines at just 65mm wide, ideal for those looking to maximise on natural light and views. OW-80 may not offer sightlines as slim as OW-70, however, it offers an internal flush casement, which OW-70 cannot provide.
Both OW-70 and OW-80 are manufactured using premium grade aluminium, are durable and low maintenance, and come with an industry-leading guarantee of up to 20 years.
Learn more about our OW-80 window.
Completely bespoke and made using premium grade aluminium - just like all Origin products - the OW-70 offers a slimline alternative guaranteed to modernise your property.
Achieving a sightlines of just 65mm, the Origin Slimline Window is one of the slimmest windows available with a guarantee of up to 20-years. These ultra-slim sightlines mean less frame and more natural light, as well as better views. Available as either a casement or fixed window, the OW-70 is ideal for spaces where maximising glass size and light is essential.
Why aluminium is the first choice for replacement windows
The OW-70 is also available with two beading options, square or chamfered, giving you ultimate flexibility in specifying a window that suits not only your personal taste, but your building’s character.
Expertly designed to feature no overlapping external frames, our Slimline Window will add a trim and elegant appearance to your home. Whether it’s a townhouse or new build, the OW-70 adds a touch of class to any property; a joy to look at as well as use.
And, we’re not just saying that. From the size of your window to the colour of your handle, all of our orders are completely bespoke so that you can design a window that’s perfect for your home. Every OW-70 comes with either an inline handle or crank handle, both of which offer an elegance feel and finish – the choice is yours.
With over 150 RAL colours to choose from, you’re bound to find the perfect colour windows for your home.
If you need your windows urgently, then choosing one of our popular colour options is for you. Available in as little as 24 hours, our popular colour options for OW-70 are 7015M, 7016M, 7021M, 9005M, 9007M, 9910M, 9910G and 9910G/7016M (dual colour). All are able to offer and elegant finish for properties old and new. Please note - your windows will be delivered to your chosen Partner and the install will be based on glass and their installation availability.
7016M (Anthracite Grey, Matt)
9910G (Hipca White, Gloss)
The OW-70 window comes as a
casement,
bay or
fixed window.
If you’re looking for
gable or
French windows then click here for the OW-80.
Available as either a casement, fixed frame, or bay window, the OW-70 remains a truly bespoke product offering from Origin. We’re able to accommodate most sizes and are on hand to help.
| Side hung | Top hung | ||
|---|---|---|---|
| Max frame size | |||
| Max frame size | 4.8m2 | ||
| Max height | |||
| Max height | 1,400mm | 1,474mm | |
| Max width | |||
| Max width | 950mm | 1,374mm | |
| Max glazed sash weight | |||
| Max glazed sash weight | 35kg | 50kg | |
The OW-70 is crafted using premium grade aluminium to offer the same levels of strength, durability and high quality that Origin products are renowned for.
Tested to some of the highest standards, the thermal efficiency exceeds current building regulations, is Secured By Design and PAS 24 certified and has also achieved resistance to racking and static torsion certificates. The OW-70 may be slim, but it is also incredibly strong.
The lock itself is a stainless steel multi-point lock, which is fitted to accurately align with the keeps. The number of locking points vary depending on the size of the window, meaning security is not compromised no matter how big your window is.
So confident in our design, we offer an industry-leading guarantee of up to 20‑years, in non-marine environments. So, you can rest assured that your Origin Windows will last for decades.
OW-70 can achieve a leading U-Value rating of 1.2 W/m2K when using triple glazing panes, which meets and beats current building requirements. When chosen with a short leg, the OW-70 achieves an A energy rating.
Feel good about your purchase, knowing that your windows have been made using one of the most environmentally friendly metals on the planet: aluminium. Aluminium can be recycled infinitely, with up to 85% of all aluminium ever produced still in circulation today, making it one of the most sought-after materials in construction. Compared to other popular door and window materials, such as uPVC and timber, aluminium is by far the more ecological choice.
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.
Here at Origin, our vision is to transform the way families enjoy their home - from inside to out…
House renovation aided by Origin’s slimline Origin range Having moved in the property in 2021, Dan wanted to refurbish the whole property to create a fresh and new start. From windows, doors to floor plans; the project was a full renovation.
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Even Bi-fold sets create a shrine of natural light to illuminate this modern bungalow.
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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
A lovely family home has recently been completed with Origin Bi-Folding Doors, OS-20 Sliding Doors and a range of OW-80 Windows.
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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.
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