NBS Source
List your products

Site assembled roofing and cladding systems.


Site assembled acoustic system with internal and external profiles which offer a choice of perforated liner for acoustic applications.

The Trisobuild® systems can be tailored to meet project requirements including fire resistance and acoustic performance. The system comprises of a Colorcoat® pre-finished steel trapezoidal liner profile, a spacer system, an insulation layer and a Colorcoat® pre-finished steel external weathering profile.

The sound absorption (SA) systems are suitable for roof and wall applications, which can be specified to meet the required acoustic performance standards for any project.

Bespoke options are available for sound reduction, sound absorption or rain noise reduction. Consult the manufacturer for further details.

A stone wool slab of density 60 kg/m² is used above the liner with a vapour control layer (VCL) laid above this, spaced by a steel galvanized top hat stool that supports the spacer system, which in turn supports the external profile and allows standard glass fibre quilt insulation to be added to fulfil the required U-value performance.

Please note that the tested systems have all used a minimal 100 mm layer of quilt, however increasing this to meet lower insulation values will not reduce the absorption figures. Consult manufacturer for details.

The system build-up includes:

- Trisobuild SA1 and SA2:

  • R32 0.7 mm Colorcoat® pre-finished steel external weathering profile.
  • 100 mm glass fibre quilt, nominal density of nominally 12.5 kg/m³, 0.040 W/mK.
  • 100 mm high Instaloc® approved spacer system.
  • 1.6 mm top hat stub, size (l x h): 60 x 85 mm.
  • 50 mm RW3 rock fibre slab from Rockwool, tissue faced to internal side, nominal density 60 kg/m³, λ = 0.039 W/mK.
  • RL32 0.7 mm trough, trough perforated (SA1) or fully perforated (SA2).

- Trisobuild SA1+ and SA2+:

As above with the addition of the lining panel fitted with rock fibre infill pieces (tissue faced to internal side). 1200 mm long. Nominal density: 45 kg/m³, 0.0035 W/mK.

Features and benefits:

  • Certified 'very good' to Building Research Establishment (BRE)'s responsible sourcing standard BES 6001.
  • Platinum® Plus is a system guarantee for up to 30 years, derived from a tailored specification to suit project requirements.
  • Loss Prevention Certification Board (LPCB) LPS 1181-1 approved 460a 14, 15, 19, 23 and 31.
  • The insulation within the system has both zero ozone depletion potential (ODP) and low global warming potential (GWP). Both these factors support the achievement of a high Building Research Establishment Environmental Assessment Method (BREEAM) rating.
  • All steel elements are recyclable, without any loss of quality. The insulation can be separated easily and if kept ‘clean’ can be recycled. An environmental product declaration (EPD) is available for all Trisobuild® systems.


Site assembled roofing and cladding systems.

General information

Uniclass 2015

Pr_25_71_14_22 Carbon steel insulating sandwich panelsPrimary


H43/10 Metal insulating sandwich panel

H43/120 Metal insulating sandwich panel

Specification data - Carbon steel insulating sandwich panels

Product Reference

Trisobuild® SA1

Trisobuild® SA2

Trisobuild® SA1+

Trisobuild® SA2+


As drawing

Insert details.

Material/ Finish


External facing

Coloroat HPS200 Ultra® pre-coated steel

Coloroat Prisma® pre-coated steel

Internal facing

Coloroat® High Reflect steel

PE15 steel


Consult technical literature for details and insert requirements.

Liner perforations

Fully perforated RL32 liner, open area: 48%

Trough perforated RL32 liner, open area: 22%

Instaloc® bracket height

100 mm


120 mm

140 mm

180 mm




Glassfibre (12.5 kg/m³)

Stonefibre (23 kg/m³)

Quilt thickness

100 mm


120 mm

140 mm

180 mm

Standard product features

Reaction and resistance to fire:

  • All Trisobuild® systems when used as a roof achieve a Grade AA rating in accordance with BS 476-3 and B roof (T4) in accordance with EN 1187.
  • All Trisobuild® SA systems have an internal reaction to fire classification of A1.
  • When used as a wall Trisobuild® SA systems have an external reaction to fire of A1 when using Colorcoat Prisma® and when using Colorcoat HPS200 Ultra is deemed to satisfy B-s3-d2 in accordance with ADB2.

Trisobuild® SA wall systems have been third party assessed for fire resistance performance and have been shown to provide up to four hours fire integrity resistance and 15 minutes fire insulation resistance. All fire wall system performances have a maximum span limit between supports of 2 m.

Thermal performance:

All quoted system U-values and construction ‘psi’ and f values have been computer modelled in accordance with EN ISO 10211 as stated in the Metal Cladding and Roofing Manufacturers Association (MCRMA)Technical Note 14 by trained and experienced technical engineers.

U-Values are based on secondary steelwork support at 1.8 m centres,1.2 m bracket spacing and insulation with a 0.040 W/mK thermal conductivity.

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°) following guidelines provided by the MCRMA technical paper 15.

Sound reduction performance:

Consult technical literature for Acoustic SRI, sound absorption coefficient and frequency information. Varies depending on insulation.

Product Options

Product reference:

- U Value performance based on a slab depth of 50 mm (SA1+ and SA2+):

  • 100 mm quilt thickness: 0.26 W/m²K (0.23 W/m²K).
  • 120 mm quilt thickness: 0.23 W/m²K (0.20 W/m²K).
  • 140 mm quilt thickness: 0.20 W/m²K (0.19 W/m²K).
  • 180 mm quilt thickness: 0.17 W/m²K (0.16 W/m²K).

Third party certifications
  • Loss Prevention Certification Board (LPCB): Certificate: LPS1181 Part 1 : 460a, 14, 15, 19, 23, 31
Similar products from Tata Steel