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The Trimapanel® System is an insulated, secret-fix architectural wall-cladding system comprising of a pre-finished steel liner profile, a polyisocyanurate (PIR) insulation core and a micro-rib Colorcoat® pre-finished steel external weathering profile. The polyisocyanurate (PIR) insulation core uses the latest foam technology providing enhanced environmental benefits, together with fire performance approved by LPCB.

The Trimapanel® System has a secret fix joint design, which is quick and easy to install, and is available in three cover widths, a choice of external profile and a wide variety of colours and finishes. The system also includes a wide range of flashing options, ancillaries, integrated window, and fabricated corner and curved panel options. These options, along with the system’s architectural appearance and design flexibility, enable architects to create unique and modern design solutions.

The system offers excellent economic and environmental performance, comes with comprehensive certification and is available with the Platinum Plus® System Guarantee. Manufactured in factory conditions operating to BS EN ISO 9001.

General information
Specification data
Product Reference


Size/ design

As drawing

As schedule

Core insulation panel thickness

70 mm

90 mm

120 mm

Cover width

600 mm

900 mm

1000 mm

External facing -

Colorcoat HPS200 Ultra®

Colorcoat Prisma®

Internal facing -

0.4 mm

0.5 mm


Colorcoat High Reflect

Pre-finished steel designed with maximum reflectivity.

Colorcoat HPS200 Ultra®

For aggressive internal atmospheres, 0.5 mm thickness only.Colorcoat PE15 – Pre-finished steel.


Bright white

For Colorcoat PE15 and High Reflect.

Special order

For Colorcoat HPS200 Ultra.

Standard product features

Facing material:

Steel manufactured to BS EN 10326.

External facing thickness:

0.7 mm.

Panel length:

  • Maximum: 12 m.
  • Minimum: 2.0 m (On-line), 300 mm (Off-line).

Panel cover width (standard):

1000 mm.

Panel core:

The PIR insulation within the system has zero ozone depletion potential (ODP) and a very low global warming potential (GWP) of less than five. Both these factors support the achievement of a high BREEAM rating.

Manufacturing tolerance (to BS EN 14509):

  • Cover width: ±2 mm.
  • Thickness: ±2 mm.
  • Squareness: <6 mm.
  • Cutback: -2 mm +5 mm.
  • Length: < 3 m (±5 mm).
  • Length: > 3 m (±10 mm).

Fire performance:

The Trimapanel® System carries Grade EXT-A and EXT-B approval by the LPCB. Fire resistance performance of 15 minutes and four hours integrity is also achievable with enhance fixing and methods, contact the technical department for details. The internal surface of the panel complies with Class ‘O’ in accordance with the Building regulations when tested to BS 476-6 and BS 476-7 and also achieves a Class B s2 rating in accordance with BS EN 13501-1.

Water penetration:

Trimapanel® System is watertight up to a pressure of 1050 Pa, in accordance BS EN 12865.

Air tightness:

In laboratory tests in accordance with BS EN 12114, the sealed panel shows evidence of air leakage as low as 0.48 m³/h/m². A practical expectation for a finished building, with effective sealing at all junctions would be 3–5 m³/h/m². However enhanced detailing practises on large shed buildings can realise air leakage performance figures of less than 3 m³/h/m².

Environmental credentials:

The Trimapanel® System is a sustainable solution with responsible sourcing and traceability of all component materials. All steel elements are produced within the UK Tata Steel’s steel production, strip processing, galvanizing, coating and profiling facilities. In addition the system’s carbon footprint is further minimized by the manufacturing process being situated adjacent to Colorcoat® pre-finished steel production facility. All steel elements are 100% recyclable back into new steel products, without loss of quality. The insulation can be separated using existing scrap shredding technology, after which the materials can be recovered or recycled.

Product Options

Core insulation thickness:

- Weight (kg/m²):

  • 70 mm: 11.89.
  • 90 mm: 12.67.
  • 120 mm: 13.85.

- U-value (W/m²K):

  • 70 mm: 0.31.
  • 90 mm: 0.24.
  • 120 mm: 0.17.