KAT Bautec Lantern Roof

KAT Aluminium Lantern Roof. Visual Elegance, Supreme Performance.


KAT’s Lantern Roof is the advanced engineering solution in lantern design, allowing in an unrivaled amount of light and providing a feeling of space, uninhibited by bulky roof bars.

KAT only offer niche products to a superior specification and the Lantern Roof is no different. It is a thoughtfully engineered roofing solution with slim sightlines, excellent structural integrity and excellent thermal performance.

The roof is delivered by KAT ready to be quickly assembled on-site. Offering solutions for all property types; from sensitive period buildings in conservation areas, spa’s and atriums, to modern new build properties, extensions or refurbishment projects.

KAT customers have a passion for stylish aesthetics, structural integrity and enhanced thermal performance and the Lantern Roof meets all these requirements.

It has been designed to allow consumers to use their orangery or extension all-year round with almost zero maintenance. The KAT Lantern roof is supplied with industry leading thermal efficiency as standard. Designing and ordering is simple.


Key features of KAT's Lantern Roof

  • Comfortable year-round room use
  • Warm in winter, cool in summer
  • Strong, light, 40mm aluminium rafters
  • Excellent thermal properties
  • Visible width and sightlines of rafters is 3% less than conventional roofs
  • Bespoke roofs made to order
  • Up to 4 metres wide and almost no length constraint
  • Designed to withstand the wind and snow
  • For larger spans, the structure is invisibly reinforced internally in the rafters
  • Wide range of RAL colours available, including dual colours


  • Opening roof vents are available
  • Solar Glass or Acoustic Glass
  • Choose from contemporary, regular or circular lantern roofs

Full aluminium (thermally broken with polyamide break).
Rafter width
Ridge width
External caps
Bevelled or Flat external caps to suit the building design in a choice of either uPVC or Aluminium.
Boss & hoods
Not required
Tie bars (dependent on design)
Choice of hidden or rafter tie bar available.
No cill required (unless preferable)
Check with local building control authority
Glass U Value
Double glazing - 1.2 W/m²k
Triple glazing - 0.7 W/m²k
Glass options
Toughened safety glass
Self-cleaning technology uses the rain and UV light from the Sun to combat dirt, the need for manual cleaning is reduced. Glass is manufactured to BS EN 1279 Parts 2 & 3 and BS EN 12150.

Solar control glass is available in neutral, blue or green and reflects over 60% of the Sun's solar energy.

Acoustic glass is available on request.
White, Grey and Black are standard colours.
A wide range of RAL colours are available, including dual colours.
Regular Lantern Roof max size 3000mm x 4000mm (with additional rafters, can reach 5000mm x 10,000mm)

Circular up to a max size 4800mm

Contemporary max size 1500mm x 3000mm

Contemporary pyramid max size 2000mm x 2000mm (regular pyramid can be manufactured in sizes larger than contemporary pyramid - please ask)

Roof Vents
Aluminium outer frame and PVCU inner frame as standard. A fully Aluminium roof vent is available.

Roof vent can span up to 1600mm wide.

Manual or electronic opening available.



Each KAT Lantern Roof is carefully engineered with strong, light, 40mm aluminium box rafters creating slim profiles with excellent thermal performance, ensuring you can use your room 365 days a year.

The choices are simple; choose the frame colour combination, then decide what size suits your home and we will manufacture a bespoke roof to your specification.



Material Information


Aluminium is the optimum material for manufacturing glazed roofs from and that is why glazed aluminium is widely specified by Architects for the most serious new build and refurbishment projects. Aluminium framing offers strength, durability and low maintenance. The Lantern Roof is thermally broken with Polyamide; toughened double glazed as standard.




A complete lantern roof system with an almost limitless range of sizes available, along with glazing and cill.

  • Cill – It is usually fitted straight onto a pre-prepared timber kerb upstand with no cill requirement. Cills are available.
  • Kerb upstand – The Lantern Roof should be mounted on an upstand on top of the flat roof.




Safety & Security


KAT’s Lantern Roofs are fitted with toughened safety double glazing to the inner and outer pane. The self-cleaning technology, uses rain and UV light from the Sun to combat dirt, so the need to manually clean your Lantern Roof is reduced.

It offers excellent structural integrity for maximum strength having been designed to withstand the wind and snow loads.


Safety & Security

Colour Options


Popular colour options are White, Black and Anthracite Grey.

A wide range of RAL colours are available, including dual colours.