The Hercules XL is engineered for structural spans that ordinary roof‑lantern blinds simply cannot handle.
With over eight times more tension than CTS spring systems, the fabric must remain perfectly stable while stretched across widths up to 4.8m and lengths up to 7.5m.
This is why Hercules XL uses only dimensionally stable, high‑performance technical fabrics. These fabrics are built around glass fibre cores, engineered laminates and composite structures that hold their shape under heat, humidity, gravity and sustained tension. They stay flat, stay true and stay reliable, even when installed horizontally over large areas with no visible cords.
These fabrics also need to be manufactured in wide widths. Wide‑width fabrics give us the best opportunity to avoid mid‑welds (joins in the fabric), ensuring a cleaner aesthetic, stronger structural integrity and a uniform appearance across the blind.
Once stability is guaranteed, the real choice becomes performance: heat control, brightness, insulation, privacy and blackout capability. The Hercules XL fabric range is designed to give you meaningful control over how your living space feels all year round.
Copaco Serge 600 5% Openness – The Standard Fabric
- Excellent dimensional stability
- 3200mm wide
- No uplift in price
Copaco Serge 1% Openness – An uplift for a tighter weave
- Excellent dimensional stability
- 3000mm wide
- £15 per square metre uplift on standard fabric
Copaco Serge 10% Openness – An uplift for more view out
- Excellent dimensional stability
- 3000mm wide
- Offering better view out and more light
- £25 per square metre uplift on standard fabric
Copaco Serge 600 Solar Blockout – An uplift for ultimate winter & privacy comfort
- Excellent dimensional stability
- 3000mm width
- Night time privacy & winter insulation
- £60 per square metre uplift on standard fabric
Serge Ferrari Flexlight 6002 Opaque – An uplift for room darkening
- Blackout fabric
- Stretched Ceiling Effect
- 3000mm width
Flocart Greenshade Nox – An uplift for room darkening
- Blackout fabric
- Fabric white backed
- 3200mm width
Hercules XL Uplifts In Price Summary
| Fabric Type £/m2 Uplift In Price |
| Copaco Serge 600 5% – No uplift |
| Copaco Serge 1% £15 per square metre |
| Copaco Serge 10% £25 per square metre |
| Copaco Serge 600 Solar £60 per square metre |
| Serge Ferrari Flexlight 6002 Opaque £25 per square metre |
| Flocart Greenshade Nox Opaque £25 per square metre |
Final Word
A well‑chosen roof‑lantern fabric does far more than stay flat and stable. Yes, you want a blind with no visible cords and no sagging, but the fabric choice is what determines whether your extension feels calm, bright and comfortable all year round. The real transformation comes from selecting a fabric whose performance genuinely matches the way your space behaves. It is never a case of “any fabric will do”. Choosing the right performance fabric protects the dream you had for your designed living space without compromise.
Get in Touch
If you have questions and want to talk through the specifics of your project, our team is here to help. For a friendly chat about the best options for your home, call our specialists.
Call: 01256 345580 or book an appointment online or join Chris on a video chat via his calender below beneath the supporting links
Supporting Links
Most Roof Lantern Blinds Sag. Here’s Why.
How Claire Transformed Her Orangery with Hercules – WindowTreat
Success Story: Kathryn’s Hercules XL Roof Blind Transformation – WindowTreat
