Ribline is a popular choice for residential roofing, farm buildings and light industrial applications, making this low rib profile an alternative to Corrugate. Ribline is warranted for coating performance*, corrosion resistance and substrate integrity. Ribline is an attractive and cost effective profile for most roofing and cladding applications.  

*Excluding Galvsteel

Our Ribline profile is available in a wide selection of materials with Alsynite topglass sheeting available to match.

Taranaki Steelformers have recently introduced Ribline Smooth to their product line. Ribline Smooth is an attractive wall cladding alternative, being run without swages brings a smooth, continuous finish to each tray.


  • Available in 0.40mm BMT G550, 0.55mm BMT G550/G300

  • 5° minimum roof pitch

  • Crimp curve options available

  • Suitable for residential, commercial and industrial roofing and cladding applications

  • Manufactured in Stratford

  • Available in Zincalume,  Galvsteel,  Colorsteel Endura  Colorsteel Maxx,  Colorsteel Dridex and Dridex +,  Mill finish 0.9mm BMT aluminium,  ColorCote  AlumiGard (available on request)

  • Sheet lengths are custom run to order

The Colorsteel® Range

Please note that the colours shown are indicative only and will vary depending on your screen resolution and/or print quality. We recommend you request a sample from your nearest Steelformers branch.

Be sure to contact a Steelformers representative to check stock levels of your chosen colour prior to placing your order.

Fastenings & Fixings

It is important to select the correct fasteners for your application. The fasteners must be class 5 minimum, their durability is at least equal to the durability of the material and all screws have a neoprene washer and in some cases a load-spreading washer and EPDM.

The NZMRM Code of Practice provides information on selection, fixing methods and patterns according to wind zones.

Maximum Spans

The following chart shows the maximum permissible purlin spacing (span) for Ribline G550 (under 1km concentrated load).

These should be reduced in high foot traffic areas, areas supporting items such as air conditioning units or positioned to suit specific locations e.g. high wind zones.

Delivery Services

Steelformers have the means of delivering lengths up to 16.2m long. Contact your nearest Steelformers branch for more information on what's available. Longer lengths can be delivered upon arrangement (price on application).


Installation must be completed by, or under the supervision of a Licensed Building Practitioner with the relevant license class. All installations should be to the standards as set out in the NZMRM Code of Practice. 

Warranty & Maintenance

Ribline is covered by warranty for coating performance, corrosion resistance and substrate integrity. Warranty is subject to the use of the appropriate product for the environment and regular maintenance as per the manufacturers recommendations.

Prior to ordering, the product type, material, paint coating type, along with site details including address, distance from sea and degree of exposure need to be considered to ensure your chosen material is suitable for the environment in which they will be exposed.

Contact a Steelformers sales representative for advice or more information.

To prevent the accumulative effects of salt spray, dirt and other material not removed by rain, manual washing is required. Areas that do not receive adequate rain washing e.g. soffits, wall cladding under eaves, underside of gutters and fascias.

Reference must be made to New Zealand Steel Ltd or Pacific Coil Coaters literature for exact details of maintenance requirements.

Useful Links

Click the Masterspec link below to view and/or download the most up-to-date Taranaki Steelformers work sections.

masterspec logo-partner.jpg


Because of Taranaki Steelformers’ policy of continuous product improvement, the company reserves the right, at any time and without notice to discontinue or modify designs, features and other specifications of their product. Taranaki Steelformers reserves the right to either temporarily or permanently withdraw any such product from the market without incurring any liability. Taranaki Steelformers disclaim any liability for loss or damage suffered from the use of such material as all information is correct to the best of our knowledge at the time of publishing. As this is only issued as a general guide, it should be not be treated as a substitute for detailed technical advice.


Taranaki Steelformers Ltd

23 Katere Road


New Plymouth 4312

0800 4 ROOFING

06 7583831



Wanganui Steelformers

380 Heads Road


Wanganui 4501

0800 800 077

06 3445142




Steelformers Stratford

Mountain Road

PO Box 36

Stratford 4332

0800 655 142

06 7655191



King Country Longrun

Huia Street

PO Box 7

Taumarunui 3920

07 8956464






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