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With its strong traditional appeal, ease of installation and relatively low cost, Steelformers Corrugate finds immediate acceptance in both domestic and commercial markets. Available in a range of coatings either plain or pre-painted with custom made flashings and accessories to match. Corrugate is warranted for coating performance*, corrosion resistance and substrate integrity. So whatever the choice, drape-curved, bull nose, laid horizontally or vertically, let your imagination run wild with Steelformers Corrugate.

*Excluding GALVSTEEL®

Our Corrugate profile is available in a wide selection of materials with Alsynite polycarbonate and topglass available to match.

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3 cups


1½ cups



All profile dimensions are nominal


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

  • Available in 0.40mm (G550) and 0.55mm BMT (G550/G300) ZINCALUME®,  GALVSTEEL®,  COLORSTEEL® ENDURA® AND MAXX®COLORSTEEL® DRIDEX® and DRIDEX®+,  Mill finish 0.9mm aluminium,  ColorCote® AlumiGard (available on request, conditions apply)

  • In accordance with Acceptable Solution E2, the minimum roof pitch for Steelformers Corrugate is 8°

  • Rollformed in Stratford, Wanganui and Taumarunui factories

  • Sheet lengths are custom run to order

  • Bull nose options are available through our Stratford factory

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.

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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 Corrugate 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.

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