Standard Thermalight
The Thermalight Flat Fixed Rooflights |
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The Thermalight concept is based on an innovative design that delivers maximum daylight due to no internally visible framework. This low profile, high performance system is not prone to the 'water ponding' effect that rival products are prone to, due to it's intelligent use of flush external metalwork.
Thermalight units are suitable for both flat and sloped applications, they are available in many shapes and sizes and even come in a walk on variant.
The Thermalight system is supplied with a complete fixing kit which includes concise fitting instructions for installation by construction tradesmen or DIY enthusiasts.
Key Features:
- Low profile
- Simple installation
- No internally visible framework
- Bespoke sizes to order
- Safety glass to both panels
- High thermal performance
- Large spans available
- Easy clean and low maintenance
- Walk on specification
- Low E coating


| Technical Data | All sizes quoted are overall external weathered upstand sizes |
| Recommended minimum kerb height | 150mm (to avoid invalidating roof guarantees). |
| Minimum kerb thickness | 75mm |
| Recommended pitch on kerb | 5 degrees |
| Minimum glass size | 400 x 400mm (smaller can be made but it's no longer a means of obtaining effective daylight) |
| Standard glass | 28mm DGU; 6mm toughened outer; 16mm black silicone sealed spacer; 6mm Low E coated toughened inner pane. |
| Maximum single pane glass kerb size | 3500mm x 1500mm span @ up to 5 degrees kerb pitch; 3500mm x 1700mm span @ 10 degrees and over pitched kerb |
| Standard sizes (outside kerb sizes) | 1000mm x 1000mm / 1000mm x 1500mm / 1000mm x 2000mm |
Thermalight Fixed rooflights can be manufactured to most configurations.
For more information, please call our technical department on 01276 451555.
DOCUMENTATION:
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 info@nationaldomes.com or use this e-mail form to contact us.

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