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Trisobuild™ Systems comprise of a pre-finished steel trapezoidal liner profile, a Platinum Plus® approved spacer system, an insulation layer and a Colorcoat® pre-finished steel external weathering profile. A comprehensive range of internal and external profiles are available, all of which have been comprehensively tested, and third party assessed for structural capability by the Steel Construction Institute (SCI).

Tata Steel has created a range of Trisobuild™ System solutions that can achieve high levels of thermal, air-tightness, fire and acoustic performance, to meet the needs of any building envelope application. The systems ancillary components (i.e. fixings, sealants, roof lights, fall arrest, gutters and walkways) are specified from a range of approved Platinum Plus® System Guarantee suppliers who are selected on the basis of their ability to meet stringent technical criteria combined with 25 year product durability. Manufactured in factory conditions operating to BS EN ISO 9001.

General information
Specification data - Metal profiled sheet self-supporting roof covering systems
Product Reference

Trisobuild™ R

With standard LP 1000 liner panel, 0.4 mm thick.

Trisobuild™ RW

With walkable RL 32 liner panel, 0.7 mm thick.

Size/ design

As drawing

As schedule








Bright white

For Colorcoat PE15 and High Reflect.

Special order

For Colorcoat HPS200 Ultra and painted aluminium.


Knauf Factory Clad, glass fibre

Rockwool Cladding Roll, rock fibre


0.24 W/m²K

0.20 W/m²K

0.18 W/m²K

0.14 W/m²K

0.12 W/m²K



Flashings, finish and colour matching external sheet

Material -


0.9 mm thick.


0.7 mm thick.

Material Finish

Coated aluminium

Colorcoat HPS200 Ultra®

Colorcoat LG®

Colorcoat Prisma®

Plain mill aluminium

Stucco embossed aluminium

Internal profile -

Colorcoat High Reflect

Pre-finished steel designed with maximum reflectivity.

Colorcoat HPS200 Ultra®

For aggressive internal atmospheres, not available with Trisobuild™ R.

Colorcoat PE15

Pre-finished steel.

Standard product features

Profile length:

  • External: 1–15 m.
  • Internal: 1–16 m.

Internal profiles:

1000 mm cover width.


  • Systems up to a height of 220 mm: Ash and Lacy, Ashgrid spacer and Fixing Point, Gridtite System.
  • Systems for height over 220 mm: QBM, Titan and Ashgrid, ABV spacer.

Manufacturing tolerance (to BS EN 14509):

  • Cover width: ±5 mm.
  • Squareness: 0.5% of cover width.
  • Length: < 3 m (±5 mm).
  • Length: > 3 m (±10 mm).

Fire performance:

Trisobuild™ R and RWL Systems when used as a roof achieve a Grade AA rating in accordance with BS 476-3, which tests for external surface spread of flame and fire penetration or are “deemed to satisfy without the need for testing” in accordance with Commission Decision 200/553/EC. The Colorcoat® pre-finished steel products used within the Trisobuild™ System meet the requirements the Building Regulations Approved Document B for internal and external surfaces. Trisobuild™ Systems can also offer a Grade EXT-B approval by the LPCB.

Water penetration:

All roof systems are capable of being laid at a 4° roof pitch (with the exception of the 13.5/3 profile which is limited to 10°).

Air tightness:

In laboratory tests in accordance with BS EN 12114, the sealed panel shows evidence of air leakage as low as 0.30 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 Trisobuild™ R and RWL Systems are 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 minimised 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.

Product Options

External profiles:

  • R32: 1000 mm cover width, minimum pitch 4°.
  • R40: 1000 mm cover width, minimum pitch 4°.
  • R46: 900 mm cover width, minimum pitch 4°.
  • R60M: 800 mm cover width, minimum pitch 4°.
  • R13.5/3: 980 mm cover width, sinusoidal profile, minimum pitch 10°.