EOS97 Aluminum Circular rooflights
Bespoke round flat roof glazing for architectural specifications
A bespoke-manufactured circular flat roof glazing system for projects where a standard rectangular rooflight does not satisfy the architectural intent. Available in fixed and walk-on configurations up to 3000mm diameter, with a matching curved insulated upstand manufactured in-house
Manufactured to specification — diameter, glass and finish
The EOS97 circular rooflight is manufactured to order in any diameter from 650mm up to 3000mm. A curved insulated upstand — also manufactured in-house — is available to match, providing a thermally continuous assembly with a U-value as low as 0.32 W/m²K at the upstand and a whole-unit system performance matching the standard EOS97 range.
Specify glass, finish and upstand configuration
The EOS97 circular rooflight accepts the same glass specification options as the standard EOS97 range:
• Solar control glazing — g-value from 0.27, suitable for south-facing or high-solar-exposure locations
• Tinted glass — for privacy or solar management
• Ritec ClearShield — permanent glass surface treatment, recommended for hard-to-access installations
• Triple glazing — upgrades system U-value to 0.88 W/m²K
Frame finishes are available in RAL7016 anthracite grey as standard, with any RAL colour available to order.
Certified Thermal Performance
The EOS97 circular rooflight achieves independently certified U-values of 1.22 W/m²K (double-glazed) and 0.88 W/m²K (triple-glazed with 97mm insulated upstand) — identical performance to the standard EOS97 range. Performance certificates are available for inclusion in specification and building control documents.
Download technical details, brochures and spec sheets for the EOS97 opening rooflight system.
| Min. Structural Size: | 650mm | Max. Structural Size: | 2000mm |
| Upstand Height Opt: | 150/300mm | Upstand Pitch Opt: | Flat |
| Standard Ext. Colour: | RAL7016 | Standard Int. Colour: | White |
| Glass Outer Opt: | 6/8 or 10mm Heat Soak Tested | Glass Inner Opt: | 8.8/10.8/11.5mm Laminate |
| Double Glazed U Value: | 1.22 W/m2K | Triple Glazed U Value: | 0.88 W/m2K |
| Air Permeability: | EN 12207 | Watertightness: | EN 12208 |
Optional Extras
Solar control glass – Reduces solar heat gain and offers high levels of natural light
Ritec easy clean glass finish – Makes the surface of the glass ‘non-stick’
Insulated Upstands — Manufactured to Match
Every EOS97 circular rooflight can be supplied with a matching curved insulated upstand, manufactured in-house at our Kent facility. Because the upstand is made alongside the rooflight, dimensional accuracy is guaranteed — no site-cut timber, no cold bridging risk at the perimeter junction.
The upstand core is Polyurethane throughout, achieving U-values as low as 0.32 W/m²K — contributing directly to the whole-unit thermal performance and supporting Part L compliance without relying on additional site insulation. Available in 150mm or 300mm heights to suit cold and warm roof constructions respectively.
Product overview.
- Triple glazing is available as an upgrade
- Provides enhanced energy efficiency
- Tinted, privacy and solar control glazing options
- Ten-year warranty
- Intruder-proof
- Low system U Values, with options under 0.76 W/m2k
- Designed for roofs between 0-15 degrees
- Wide range of RAL colour frames to choose from
- Optional upstand suitable for flat or sloped installations
- Option to upgrade to Impact resistance (CWCT Class 1) to ensure the highest safety standards.
- Manufactured in the UK
Are you looking for fixed rooflights for a commercial project?
We supply rooflights to custom specifications or standard sizes, as a one-off or in volume. Find out more about how we can support your commercial development.
Contact our team
If you have any questions, would like a bespoke price or want to enquire about our installation service. Give us a call or drop an email:
0208 462 3557
Our other products
Rooflights
We offer a wide range of rooflights designed for flat and low pitched roofs.
LaNterns
Our slim line lanterns are a modern twist on the traditional.
Skylights
Frameless design coupled with exceptional thermal performance.