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Trimline is a six-ribbed trapezoidal profile with a 29mm high rib and 735mm effective cover. Trimline is typically utilised in domestic roofing and cladding or commercial roofing and cladding applications where spanning ability is not a prime requirement.

Steel & Tube offers four trapezoidal rib products with rib heights varying between 20mm and 30mm manufactured at different locations throughout New Zealand.

All Steel & Tube roofing, cladding and rainwater goods manufactured from COLORSTEEL are accredited with Environmental Choice which contributes to Homestar and Greenstar.

Key Features
  • Manufactured in Auckland, Whangarei and Wellington
  • Minimum pitch 3°
  • Can be crimp curved to 400mm radius
  • Can be sprung curved to minimum 25 metre radius
  • Translucent sheeting available to match
Eco Choice Aotearoa (ECNZ) Licensed
Eco Choice Aotearoa
NZ Made
NZ Made
NZ-Owned Business
NZ-Owned Business
Scope of Use
  • Residential roofing and cladding
  • Commercial and industrial roofing and cladding
  • Drape, spring and crimp curving
  • Steel & Tube Trimline is available in a variety of materials to suit the environment including galvanised, Zincalume and aluminium
  • Matching reinforced natural lighting sheets are available in trafficable, non-trafficable, thermal and condensation control and fire ratings to suit the project
  • A full range of matching accessories are available including ridging, underlays, safety mesh, fasteners and rainwater systems
Limitations on Use
  • Minimum pitch 3°
3° Minimum Roof Pitch Required
NZS 3604 Corrosion Zone B suitable
Corrosion Exposure Zone B
NZS 3604 Corrosion Zone C suitable
Corrosion Exposure Zone C
NZS 3604 Corrosion Zone D suitable
Corrosion Exposure Zone D
NZS 3604 Wind Zone Extra High suitable
Extra High Wind Zone
NZS 3604 Wind Zone Specific Design suitable
Specific Design Wind Zone
Statement of Building Code Compliance

Trimline if designed, used, installed and maintained in accordance with the statements and conditions of the technical literature, will meet or contribute to meeting the following provisions of the NZBC:

  • Clause E2 External Moisture: Trimline will comply with the performance requirements of E2 when installed in accordance with E2/AS1. Alternatively, when designed in compliance with the NZ Metal Roof and Wall Cladding Code of Practice, or Steel & Tube Roofing Solutions Product Guide, Trimline will comply with Clause E2 where SLS wind loads do not exceed 3.0 kPa.
  • Clause B1 Structure: In .40mm or .55mm steel, G550 grade (high strength) Trimline will meet the requirements of B1 for the following loads and spans. Figures are given for rib fastening with self drilling screws and proprietary load spreading washer to each rib. Pan fixing of wall cladding will also attain the same loads. For other materials or grades of material, or applications outside the attached graph, specific design is required.
  • Clause B2 Durability: With normal maintenance, the requirements of Acceptable Solution B2/AS1 will be met by nominated materials in the following environments as defined in New Zealand Steel Specifiers and Builders Guide June 2010
  • Clause C Protection from Fire
Other Performance Attributes

All Steel & Tube roofing, cladding and rainwater goods manufactured from COLORSTEEL are accredited with Environmental Choice which contributes to Homestar and Greenstar.

B1 Structure compliant
B2 Durability compliant
C Protection from Fire compliant
Protection from Fire
E2 External Moisture compliant
External Moisture
BIM Files Trimline
CAD/PDF Link Trimline
Product Technical Statement
Specification Clause (Masterspec)
Environmental Choice NZ Award - Wellington Branch

2022 March

Environmental Choice NZ Award - Whangarei Branch

2022 March

Environmental Choice NZ Award — Auckland Branch

2022 March

Test Results: Fire Testing
Colorsteel Material Selection
Maintenance Instructions
Brochure: Product Showcase
Brochure: Roofing Solutions Product Guide
Colour Range
Order Roofing and Wall Cladding Samples
Product resources and links

Steel & Tube are a New Zealand supplier of a range of steel products and services.

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