Dimond Corrugate

Dimond Corrugate Roofing and Cladding

Suitable for 8° and greater

762mm Cover width

851mm Sheet width

Corrugate has a low rib

Suitable for residential

Suitable for light commercial

Suitable for commercial

11.5 ribs per sheet

Corrugate is manufactured in Whangarei, Auckland, Hamilton, New Plymouth, Wellington, Christchurch and Dunedin.

Suitable for Villas

Suitable for Bungalows

Suitable for Modern

Suitable for Monopitch

Suitable for Apartments

Suitable for Townhouses

Suitable for Hips

Suitable for Rake Cuts

Suitable for Valleys

Suitable for Mono-pitch

Suitable for Curved

If this product is not suitable for your project... Click here to find product options suitable for your requirements.

    • Suitable for 8° and greater

      762mm Cover width

      851mm Sheet width

      Corrugate has a low rib

      Suitable for residential

      Suitable for light commercial

      Suitable for commercial

      11.5 ribs per sheet

      Corrugate is manufactured in Whangarei, Auckland, Hamilton, New Plymouth, Wellington, Christchurch and Dunedin.

      Suitable for Villas

      Suitable for Bungalows

      Suitable for Modern

      Suitable for Monopitch

      Suitable for Apartments

      Suitable for Townhouses

      Suitable for Hips

      Suitable for Rake Cuts

      Suitable for Valleys

      Suitable for Mono-pitch

      Suitable for Curved

      If this product is not suitable for your project... Click here to find product options suitable for your requirements.

Dimond Corrugate Profile

Corrugate is a firm favourite with Kiwis because of its truly classic look that is great on all different styles of building.  Used for both roofing and cladding, you’ll never go wrong with classic Corrugate.  

Fastener Design

Corrugate should be screw fixed to either timber or steel purlins. The use of the appropriate length of 12g screw, or when fixing aluminium the use of a 12g or 14g Alutite, on both a non cavity and cavity system will ensure failure by screw pull out will not occur under loads within the scope of the Limit State Load / Span Capacity chart.

Corrugate Fastener Designation

Purlin or frame material Roof (rib fixed) - Steel based sheet Roof (rib fixed) - Aluminium based sheet Wall (pan fixed) - Steel based sheet Wall (pan fixed) - Aluminium based sheet
Timber T17 x 12 - 11 x 50
M6 x 50 HG-Z4 Roofzip
14g x 55mm Alutite with a 8mm dia. clearance hole, alum. profield washer and 36mm dia. EPDM seal Non-cavity: M6 x 50mm HG-Z4 Roofzip
Cavity: M6 x 50mm HG-Z4 Roofzip
Non-cavity: 12g x 35mm Alutite
Cavity: 14g x 55mm Alutite
Steel up to 1.5mm thick M6 x 50 HG - Z4 Roofzip or Tek 12g - 14 x 35 Class 4 Stainless steel grade 304 14g x 50mm with a 8mm dia. clearance hole, alum. profiled washer and 36mm dia. EPDM seal Non-cavity: Tek 12g - 14 x 20 Class 4
Cavity: Tek 12 - 14 x 35 Class 4
Non-cavity: Stainless steel grade 304 14g x 20mm with a 15mm dia. bonded washer, through an 8mm dia. clearance hole.
Cavity: Stainless steel grade 304 14g x 50mm with a 15mm dia. bonded washer, through an 8mm dia. clearance hole.
Steel 1.5mm to 4.5mm thick Tek 12g - 14 x 35 Class 4 Stainless steel grade 304 14g x 50mm with a 8mm dia. clearance hole, alum. profiled washer and 36mm dia. EPDM seal Non-cavity: Tek 12g - 14 x 20 Class 4
Cavity: Tek 12 - 14 x 35 Class 4
Non-cavity: Stainless steel grade 304 14g x 20mm with a 15mm dia. bonded washer, through an 8mm dia. clearance hole
Cavity: Stainless steel grade 304 14g x 50mm with a 15mm dia bonded washer, through an 8mm dia. clearance hole.

*if sarking or insulation is used over the purlins or for wall cladding fixing onto a cavity batten, into the stud, the screw length will need to be increased.

For screw size range and fastener / washer assembly refer Section 2.2.3.1 of the Dimond Roofing & Cladding Technical Manual.

The Limit State Load / Span Capacity chart is based on 5 screw fasteners/sheet/purlin without the use of load spreading washers (except for Duraclad material, which must be fitted with either profiled metal washers and 36mm EPDM seals, or 32mm Weatherlok washers).

Profiled metal washers are recommended for use:

  1. On end spans, or large internal spans where the Ultimate Limit State distributed load is limiting. Contact Dimond for specific advice in these design cases.
  2. When required to enable the fixing system to accommodate the thermal movement of long sheets – see Section 2.1.3.4 Thermal Movement of the Dimond Roofing & Cladding Technical Manual.
  3. Wherever the designer wishes to ensure the risk of fastener over-tightening will not cause dishing of the crest of the profile rib.

Use in serviceability categories (1) or (2) can allow the reduction of fasteners to 3 screw fasteners/sheet/purlin. If this is done, the distributed load capacities given in the chart should be reduced using a multiplying factor of 0.6.

Long spans may require the specification and use of side lap stitching screws

Design Example

Restricted access roof, 0.5mm G550 steel Corrugate has a maximum end span of 1000mm and a maximum internal span of 1500mm. The following distributed load capacities apply.

Corrugate 5 fasteners/sheet 3 fasteners/sheet
End Span 1000mm 1000mm
Internal Span 1500mm 1500mm
Serviceability 2.5 kPa 1.5 kPa
Ultimate 4.5 kPa 2.7 kPa

Dimond Corrugate Fastener Layout Options

Dimond Corrugate 3 Fastener/Sheet Layout Dimond Corrugate 5 Fastener/Sheet Layout
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