Imperial
A premium standing-seam cladding with flat pans, slender ribs, and the versatility to curve for bold architectural designs.
LYSAGHT IMPERIAL™ delivers a refined, contemporary finish through its broad flat pans and sharply defined ribs. Designed as a concealed fixed standing-seam cladding, it provides a clean, uninterrupted surface while maintaining structural strength.
What sets IMPERIAL™ apart is its curving capacity—able to be pre-curved to a radius of 3 m—making it ideal for striking architectural statements not possible with standard cladding profiles. Suitable for direct-fix to steel battens or conventional substrates like plywood or fibre cement, IMPERIAL™ offers design flexibility across both roofing and walling applications.
- Concealed-fix standing seam system for sleek, modern aesthetics
- Available in two cover widths: 325 mm and 525 mm
- Rib height: 27 mm
- Minimum roof pitch: 1° (3° for end-lapped roofs)
- Can be pre-curved to a 3 m radius for unique architectural effects
- Suitable for both roofing and walling applications
- Direct-fix to steel battens, plywood, or fibre cement substrates
- Manufactured from COLORBOND® and ZINCALUME® steel
- Long sheet lengths available (up to 24 m)
- Australian-made and backed by warranties
Classic Colorbond Colours
Colorbond Ultra Colours
Colorbond Matt Colours
Technical Specifications – IMPERIAL™
| Specification | 325 mm Cover | 525 mm Cover |
|---|---|---|
| BMT (mm) | 0.55 / 0.75 | 0.55 / 0.75 |
| Mass (kg/m²) | 5.52 (0.55) / 7.46 (0.70) | 5.13 (0.55) / 6.92 (0.70) |
| Nominal Cover Width (mm) | 325 | 525 |
| Rib Height (mm) | 27 | 27 |
| Minimum Roof Pitch | 1° (3° for end-lapped roofs) | 1° (3° for end-lapped roofs) |
| Fixings | Concealed clip system | Concealed clip system |
Maximum Support Spacing (mm)
Roofing Applications
| Span Type | 325mm Cover 0.55BMT | 325mm Cover 0.75BMT | 525mm Cover (0.55–0.75 BMT) |
|---|---|---|---|
| Single Span | Fixed clip at 350 at roof edge. Sliding Clip at 700 at general area | Fixed clip at 450 at roof edge. Sliding Clip at 800 at general area | Not Suitable for Roofing Applications |
| End Span | As above | As above | Not Suitable for Roofing Applications |
| Internal Span | As above | As above | Not Suitable for Roofing Applications |
| Unstiffened Eaves Overhang | 50mm | 50mm | Not Suitable for Roofing Applications |
Walling Applications
| Span Type | 325mm Cover 0.55BMT | 325mm Cover 0.75BMT | 525mm Cover 0.55BMT | 525mm Cover 0.75BMT |
|---|---|---|---|---|
| Single Span | Fixed clip at 350 at roof edge. Sliding Clip at 700 at general area | Fixed clip at 450 at roof edge. Sliding Clip at 800 at general area | Fixed clip at 350 at roof edge. Sliding Clip at 700 at general area | Fixed clip at 450 at roof edge. Sliding Clip at 800 at general area |
| End Span | As above | As above | As above | As above |
| Internal Span | As above | As above | As above | As above |
| Unstiffened Eaves Overhang | 100mm | 100mm | 100mm | 100mm |
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