The Invisio Rooflight System

 A Thermally Broken Rooflight System


The Invisio thermally broken rooflight system is the latest advance in modern roof glazing. Highly insulated glass units can be installed with a frameless appearance using our unique thermally broken rooflight section and silicone jointed panes. Thanks to the advanced design of our thermal break technology these frameless rooflights can be made to very large sizes, allowing lots of light to enter spaces below. 


Sightline: frameless finish

Thermal Insulation: Uw values from 1.2 W/m2K 

Snow Loading: up to 2.02 kN/m2 

Max. Size: recommended max size 1.5m x 3m per unit

Pitch: 0 to 45 degrees

Glass Specification: up to 37.5mm thick double glazed unit with toughened laminated inner pane for safety

Shapes: square or rectangular as standard, other shapes available on request. 


sieger thermally broken rooflight

Flat frameless rooflights are often the first choice for the roof glazing on modern design and build projects. The flat glass surface makes for an unfussy glazing design which allows a lot of natural light into a space. The rooflight system from Sieger is a thermally broken rooflight system which can create very large rooflights to bespoke shapes and sizes.

The unique thermally broken design of this rooflight system eliminates the normal cold bridging issue you get with normal flat rooflights. With a thermal break within the aluminium profile the internal and external faces of metal are completely thermally separated. This provides a much better thermal performance as well as better environments for the built space (reduces energy loss and no condensation/frost on the frames).

There are two external design options with this rooflight system; first of all, you can choose the glass to end flush with the frame, alternatively you could choose for the glass to be stepped over the edge of the frame. Both options are possible. The panes can also be silicone jointed, in keeping with a frameless finish.

You can find this system in the Invisio brochure below under ‘Frameless Rooflights’.

See This at the Showroom

Come to the Sieger Showroom to see a wide range of walk on glass on show. As well as various floorlights with varying slip-resistant finishes you can also see a cut through section of the thermally broken profiles to understand just how this system goes together. Contact us (or click the button at the bottom of the page) to arrange your appointment.

Request a Quotation

Contact the team to request a quotation for your floorlight. You can speak to a member of the team for advice or click ‘Get a Quote’ to submit your request.



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The Sky House Design Centre

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