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Aluminium Windows by Origin

  • Premium window range manufactured in the UK by market leaders Origin Global
  • Internal and external flush casement
  • Combines traditional design, advanced manufacturing and versatile premium grade aluminium
  • Uncompromising security features – PAS 24:2016 certified
  • Extremely low maintenance and energy efficient
  • Available in over 150 RAL colours
  • Unmatched 20 year manufacturer’s guarantee

By combining the finest grade aluminium with precision engineering and exceptional craftsmanship, Origin Global has a proven track record in delivering high quality, functional yet sophisticated products that are built to last. See also our ORIGIN DOORS page >>

The OW-70 Slimline Casement Window

The Slimline casement offers ultra-slim sightlines of just 65mm from sash to frame with external flush fitting. High security Nemesis locking system which is PAS 24:2016 certified.

The OW-70 Slimline Window

The OW-80 Premium Casement Window

The Premium casement offers slim sightlines of 91mm from sash to frame with both internal and external flush fitting. High security Yale Encloser Locking system which is PAS 24:2016 certified.

The OW-80 Premium Casement Window

Thermal Efficiency

Able to accommodate both double and triple glazing, Origin windows include a sophisticated polyamide thermal break that’s built into the frame and prevents heat transfer from the inside to outside and vice versa. OW-80 windows can even go the extra mile to achieve a U-Value as low as 0.9 when using Aerogel technology – the same material that’s used in space suits and space shuttles. You can view our Aluminium Installations gallery to see examples of our Origin installations.

The OW-80 French Window

Flawless Colour Spectrum

With over 150 RAL colours available to choose from, you are simply spoilt for choice! In addition, both systems offer a dual colour option, so the exterior frames can match the building style, whilst the internal colour can complement or contrast your interior decor. For an immaculate finish, the highest grade powder coating is applied, creating a durable yet smooth surface that is superbly resistant to the elements.

For further information on all our Origin products, please check out our Origin brochure collection:


      An industry-unique fully flush casement, the Origin Window offers top aesthetics, high levels of security and thermal efficiency.


      Our stunning sliding door range from Origin. Our vision is to transform the way families enjoy their home – from inside to out..


      Unlock your home’s potential with the Origin Aluminium Residential Door, where security and aesthetics are superbly combined.


      Discover more about our premium range of stunning Origin aluminium bifolding doors, French doors and single doors.


      Your complete buyer’s guide to our high end range of aluminium bifolding doors from market leader Origin.


      A steel-look glazed wall and door system, allowing for a combination of light, air and space to transform your living area.

See also our ORIGIN DOORS page for our full range of bifolds, sliding and residential doors.

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  • Harp Windows (Watford) Ltd
  • 91-93 St Albans Road
  • Watford
  • Hertfordshire
  • WD17 1UL


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