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Origin Windows OW80 & OW70
Aluminium Casement Windows: The Guide
Origin has redefined the standard for aluminium windows in the UK. Combining premium-grade aluminium with precision engineering, these casement windows offer a rare blend of slim sightlines and incredible structural strength.
Two Iconic Systems: OW-70 vs. OW-80
Origin provides two main casement models, each designed with a specific aesthetic and functional goal in mind:
| Feature | OW-70 (Slimline) | OW-80 (Premium) |
| Sightlines | Ultra-slim 65mm | Standard 91mm |
| Design | External flush finish | Internal & External flush finish |
| Max U-Value | 1.2 W/m²K | 0.8 W/m²K (with Aerogel) |
| Configurations | Standard Casement & Bay | Gable, French, Bay, & Bespoke |
| Best For | Maximising natural light | Period homes & high-performance builds |
Key Benefits of Choosing 
1. Exceptional Thermal Efficiency
Origin windows are designed to keep your home comfortable year-round. While the OW-70 offers excellent insulation, the OW-80 can be upgraded with Aerogel technology—the same material used by NASA to insulate space shuttles. This allows the window to achieve a ground-breaking U-Value of 0.8 W/m²K, far exceeding standard building regulations.
2. Unbeatable Security
Your safety is paramount. Every Origin window is PAS 24 certified and features:
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Yale Encloser Locks: High-security multi-point locking systems.
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Hinge Protectors: Stainless steel guards that prevent the sash from being forced open.
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Internal Beading: The glass is fitted from the inside, meaning it cannot be removed from the exterior by intruders.
3. The "Flush" Aesthetic
Origin is famous for its flush casement design.
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The OW-80 is unique because it is flush on both the inside and outside, creating a clean, seamless line that mimics the elegance of traditional 19th-century timber joinery.
4. Total Customisation
With over 150 RAL colours available, you can choose a finish that perfectly matches your home. Popular options include:
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Dual Colour: Choose a different colour for the interior and exterior frames.
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Woodgrain Finishes: Get the look of real timber (like Walnut or Oak) with the durability of aluminium.
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Colour-Coded Hardware: Handles and even the gaskets (the rubber seals) can be colour-matched for a uniform look.
5. Built to Last (20-Year Guarantee)
Because Origin controls the entire manufacturing process in their UK-based factory, they offer an industry-leading 20-year manufacturer's guarantee. Their aluminium frames are resistant to warping, flexing, and corrosion, even in harsh marine environments. ( Marine guarantees vary dependant on location )
Why Choose Aluminium Over uPVC or Timber?
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Slimmer Frames: Aluminium is much stronger than uPVC, allowing for thinner frames and more glass.
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Low Maintenance: No sanding, painting, or staining required. A simple wipe with soapy water is all they need.
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Eco-Friendly: Aluminium is infinitely recyclable, making it the sustainable choice for modern renovations.
Click here to access the Window Collection Brochure