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The UK's Leading Supplier of Rooflights
Thermalight Glass Fixed Rooflight

Thermalight Fixed Glass Rooflights

The Fixed Thermalight unit is specifically designed with no visible framework to ensure that the maximum amount of daylight floods into the space. The use of flush glazing external metalwork also means that the unit does not suffer from the ‘water-pooling’ effect experienced by some other products.


Thermalight Fixed Rooflight The units combine a high performance, silicone-bonded double glazed casement, with a polyester powder coated aluminium framework: RAL 7016 Grey Outer, and are suitable for both pitched and flat roofs. The Fixed Thermalight unit is easy to install and is supplied with a unique internal perimeter gasket that allows the rooflight to be positioned and screwed externally onto the builder’s kerb and a matching cover clip is then applied to conceal the fixings - no need for silicone to be applied on-site.

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The double-glazed units are enveloped within the framework for added protection and to safeguard against possible breakage. Thermalight’s low-profile design – the top surface of the doubleglazed unit sitting flush with the external frame – means that rainwater will drain away with ease resulting in a naturally low maintenance product.

The extruded thermally broken aluminium frame is dual coloured as standard, and supplied powder coated to RAL 7016 (Grey Outer) and RAL9910 (White Matt Inner). External hip and ridge cappings are powder coated to RAL 7016 as standard but other RAL colour options are available upon request.

All Thermalight Roof Lanterns conform to BS5516-2:2004 up to a maximum height of 13 metres above floor level.

Thermalight Fixed Glass Rooflight Thermalight Fixed Glass Rooflight


Thermalight Circular Rooflight Circular-shaped fixed rooflights are also available, supplied fully assembled and are very easy to install. The framework is manufactured from an extruded aluminium profile which is then curved using a rolling machine, enabling us to produce a wide range of sizes. The framework is supplied powder coated to RAL9005 Black Matt as standard. Other RAL colour options are available upon request.

• Minimum of 1000mm diameter to a maximum of 2000mm diameter.

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Thermalight Multi-Part Rooflight As a low profile, structurally silicone glazed unit, it is a fully watertight rooflight making it ideal for rooflights for use on flat roof areas which require a longer run of roof lighting than can be accommodated in a single span. Thermalight Multi-Part is based upon a fixed rooflight design. As a modular system, it’s fabricated in sections with silicone joints between sections and can be tailor-made to virtually any length. The extruded aluminium framework is supplied powder coated to RAL9005 Black Matt or RAL7016 Grey as standard. Other RAL colour options are available upon request.

• Maximum span 1200mm.

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Key Features – Fixed, Circular and Multi-Part

Low Profile

No internally visible framework (excluding Multi-Part)

Clear low ‘E’ coated glass as standard

Centre pane U-Value of 1.1W/m2K

Safety glass to both panes

Easy clean and low maintenance

High thermal performance

Stock sizes available

Bespoke sizes to order

10 year guarantee

Standard Kerb Detail

Thermalight Fixed Rooflight Drawing

If you would like assistance at any time about any of the rooflights or would like further details of our range, then please do not hesitate to contact us on 01276 451555, e-mail us at or use this e-mail form to contact us.