Ultrasky Lantern Roof

With fewer and slimmer bars than other systems, the Ultrasky Lantern has the flexibility to respond to your design aspirations. If you're building a flat roof extension with lanterns, such as a house extension or orangery, you are sure to create a great sense of interior space.

Rest assured that our Ultrasky roof lantern can respond to your design requirements. Its rectangular shape is available in a range of bespoke sizes that extend from 1000mm x 1500mm through to 4000m x 5850m.

The Ultrasky’s structural strength makes the rooflight slimmer and creates a minimalist design. Its ridge is stronger than an equivalent product; it uses fewer bars and wider spans and returns an IXX value of 2,226Kmm4.

You can also choose between internal uPVC or aluminium undercladdings, which are supplied in ‘white,’ or ‘grey’. Our aluminium top caps are available in ‘chambered white,’ ‘anthracite grey’ or ‘satin black.’


  • Bespoke sizes from 1000mm x 1500 up to 2000mm x 4000
  • When fitted in a 1000mm x 2000mm configuration, the Ultrasky returns a U-value of 1.1.
  • Fixed 25° pitch
  • Can be customised by adding a manual or automatic roof vent
  • Can be clad in aluminium or uPVC – externally and internally
  • Available with hardwood timber finish to the inside
  • Returns an IXX value of 2,226Kmm4
  • No leaks – guaranteed
  • Strongest ridge on the market means fewer bars for uninterrupted sight lines
  • Pre-manufactured to your design for less disruption during the build
  • Will include a 10-year manufacturer’s warranty for complete peace of mind


  • Orangery
  • Flat roof extension
  • Atrium
  • Home extension


Ultrasky with hardwood finish

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

01254 871 800

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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