Opus Composite Windows

Opus is our own brand of composite windows which is the result of bringing two materials together to create a stunning, unique window system. With hundreds of RAL colours to choose from on the outside along with different hardwood finishes on the inside, we can design and manufacture a window that’s individual to each homeowner. We have also engineered key features to help make windows more secure with the latest multi-point locking mechanisms which are fixed through the internal timber face to the aluminium structure.

Our windows meet the latest Building Regulations for England, Wales and Scotland and we offer a comprehensive 10-year warranty on all Opus products, yet they have a life expectancy well in excess of 25 years. As a bespoke manufacturer, we tailor the specifications of every single product we manufacture, whether for the homeowner or commercial specifier.

Opus Brochure


  • Minimal maintenance
  • Real Timber Internal
  • Fully thermally broken
  • Range of external colour finishes
  • Option of Pre-finished stain internally in antique, light oak and natural
  • Slim Sightlines
  • Suitable for traditional and contemporary designs
  • Robust aluminium external


  • Replacement windows
  • Self Build
  • Conservatory side frames
  • Orangery
  • Garden rooms
  • Studios
  • Atrium
  • House Extensions


Contact Our Experts

Our expert support team can discuss your specific needs and provide details on products relevant to your installations.

01254 871 800

Marketing Support

We have a dedicated downloads section where you will find all our product brochures available in PDF format.

Should you require a brochure delivery or other marketing materials, please contact our marketing department  by emailing marketing@prefixsystems.co.uk