Trisobuild® CR
Specification details for Trisobuild® CR

EN-Construction-Overview of Trisobuild® CR curved roof systems

trisobuild cr roof system tata steel construction curved roof

The Trisobuild® CR system is a tried and tested assembly with a through fixed trapezoidal outer sheet which can self-curve around a range of radii. The system is specified with an apex sheet long enough to ensure that the end lap of the profile or roof light is below the 4 degree pitch of the curve.

Designing the roof and using Trisobuild® CR within this radius range allows the specifier to optimise cost and provide an attractive low profile roof, with the confidence that all detailing has been third-party assessed.




Table below assumes radius of roof is after designed deflection.

Radius (m) 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110
Apex sheet
length required
for end lap at
5.59 6.28 6.98 7.68 8.38 9.08 9.77 10.47 11.17 11.87 12.57 13.27 13.96 14.66 15.36

​​​​​​​If you have any questions or for further information click here to contact us.

EN-Construction-Benefits of Trisobuild® roof systems


 All our products are fully tested by third parties for criteria such as thermal performance, fire safety, acoustic performance, air-tightness, and resistance to water penetration. This together with our extensive and unbiased technical support sets us apart.

All Trisobuild® roof systems can be covered under our Platinum® Plus system guarantee. Simply fill in your project details using our easy-to-use online specification tool or contact us directly.

All Trisobuild® components are easily handled on site without specialist mechanical equipment, due to lightweight components. This can be important when working on sites with limited access.

Loss Prevention Certification Board (LPCB) approval to LPS 1181 part 1 for fire performance, helps to lower insurance premiums.

All Trisobuild® roof systems when finished in Colorcoat HPS200 Ultra® or Colorcoat Prisma® will achieve a BROOF(t4) in accordance with EN 1187 and satisfy Building Regulations in relation to fire.

An Environmental Product Declaration (EPD) is available for all the Trisobuild® roof system solutions.  Request a bespoke product or system specific EN 15804 Type III EPD to help accrue points under building certification schemes such as LEED and BREEAM.

trisobuild certification logos

​​​​​​​If you have any questions or for further information click here to contact us.

EN-Construction-Platinum® Plus system guarantee

Platinum® Plus system guarantee

Platinum® Plus is a system guarantee for up to 30 years, that covers the durability, structural and thermal performance of all system components.

The guarantee is derived from a tailored specification to suit your building function and is fully transferable on change of ownership of the building. Our reputable supply chain partners and commitment to responsible sourcing creates an enhanced building envelope system that is robust and proven.

View our interactive brochure for more information or watch our video below


Platinum® Plus offers enduring durability and building performance, lowering cost of ownership through the life of the building.

We understand that complex buildings need tailored solutions, so our online specification tool has been designed by our technical team to help you create the right specification to suit the needs of your project. We make sure all roofing and cladding components listed are compatible with ours and perform together as a system.

platinum plus logo tata steel building envelope guarantee

Our support continues through on-site checks, ensuring the products installed are in accordance with the specification.

At completion, the Platinum® Plus system guarantee is issued direct to the building owner, who enjoys the long term reassurance that any issue will be dealt with through a single point of contact.

When you choose Platinum® Plus, you’re choosing guaranteed performance, and lower operating and maintenance costs for the life of the building. 

Key features of Platinum® Plus system guarantee

In addition to the benefits that our cladding products provide, Platinum® Plus also offers:

  • Up to 30 years, transferable guarantee provided direct to building owner
  • Support from specification to on-site check
  • Create and store your tailored specifications via our online tool
  • One point of contact for help with system issues
  • Flexibility in design through our wide range of system options
  • Fully traceable products manufactured through our integrated supply chain
  • 50 years of experience and extensive testing of our products
  • Underpinned by Confidex® Guarantee for the pre-finished steel

The Platinum® Plus system guarantee is available on our Formawall®, Trisomet®Trimapanel® and Trisobuild® products.

As well as our roof and wall cladding systems, Platinum® Plus includes all flashings, boundary gutters, sealant, fasteners and safe link systems when named in the project specification.

End-to-end reassurance

Our building envelope technical team is on hand to build the right specification to meet your requirements including advice on:

  • Specification writing.
  • Acoustic SRI predictions.
  • Wind and snow load calculations.
  • Load span checks.
  • Building regulation advice.
  • Gutter design.
  • Assistance with SBEM.
  • U-value calculation.
  • BREEAM advice.
  • Detail design.
  • Condensation risk analysis.


To begin the specification process please complete your project details through our online specification tool or contact us to speak to one of our technical team click here to contact us.

EN-Construction-Download Trisobuild® Roof BIM Objects

Download BIM Objects

BIM: The way you want it

The DNA Profiler has been designed to allow you to access Tata Steel’s product information (3d parametric objects & data) how you want, when you want, to the level of detail you want, in the format you want.

Product Name Link
Trisobuild R13.5/3 sinusoidal 0.675mm steel BIM DNA Profiler
Trisobuild R32 trapezoidal 0.675mm steel BIM DNA Profiler
Trisobuild R32 trapezoidal 0.90mm aluminium BIM DNA Profiler
Trisobuild R35 trapezoidal 0.675mm steel BIM DNA Profiler
Trisobuild R40 trapezoidal 0.675mm steel BIM DNA Profiler
Trisobuild R46 trapezoidal 0.675mm steel BIM DNA Profiler
Trisobuild R46 trapezoidal 0.90mm aluminium BIM DNA Profiler

​​​​​​​If you have any questions or for further information click here to contact us.

EN-Construction-Trisobuild® roof systems Downloads


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