Corrugated Roofing & Wall Cladding

Cover Thickness(mm) Minimum Pitch Finish Minimum Length








Economical – low cost roof and wall cladding available in long lengths.

Easy Fixing – conventional through fixed screws maximise performance and installation.

762mm Cover – quick installation and easy handling.

Hi-tensile Steel – light weight and high strength.

5° Minimum Pitch – to suit most traditional applications.

Anti-capillary Side Laps – 11/2  rib overlaps for weather protection.

Spring Curving – ideal for curved roofs.

Curving Quality – available in G300 steel for architectural roofs or bullnosing.

Fully Tested – a full range of load performance tables to suit most applications.


Installation Curved Corrugated cladding is readily installed with or without fibreglass insulation blanket. If practical lay sheets in the opposite direction to prevailing weather. Installation of Stramit® Curved Corrugated cladding is a straightforward procedure using the following fixing sequence:

1. Ensure all purlins are in line and correctly installed and that mesh and blanket (if specified) are in place.

2. Position and fix the first sheet ensuring the correct sheet overhangs (minimum 50mm). Ensure that screws are not overtightened.

3. Continue to fix subsequent sheets checking that sheet ends at the lower edge are exactly aligned. It is important that the underlap of one sheet does not protrude beyond the overlap of the next – if this is unavoidable, the underlap must be trimmed locally or water ‘drawback’ may occur.

4. For sheeting that exceeds 4 metres in length straight sheets of Corrugated can be end-lapped with curved sheets to obtain the desired length. It is essential that sheets are laid progressively in runs across the roof, i.e. lay a continuous run of lapped sheets from eave to ridge, then start the next run. This ensures that any pitch variation is contained with one sheet width. Please refer to diagram on page 9 of the Stramit® Curved Corrugated & Bullnose Roof Cladding Product Technical Manual.

5. Measure the overall cover width at top and bottom of the sheets from time to time to avoid ‘fanning’.

6. For roof spans exceeding 900mm and wall spans exceeding 1200mm, stitch the sidelaps at midspan.

7. Turn up the pans at the upper roof edge and install flashings.

8. Clean up the roof after each days work, removing all screws, cuttings, swarf etc, and leave roof clean and watertight. Fasteners All external fastening screws must conform to AS3566 – Class 3. They are to be hexagon headed and must be used with sealing washers for both roofing and walling.


For connecting to purlins or top hats use: For steel (0.75bmt or greater)

No.12 x 35mm self-drilling and threading screws for crest fixing

No.10 x 16mm self-drilling and threading screws for pan fixing to walls

For timber (F11 or better)

No. 12 x 50mm type 17 screws for crest fixing

No.10 x 25mm type 17 screws for pan fixing to walls

Side Laps

No. 8 x 12mm ‘S’ point screws, or 3.2mm diameter sealed aluminium pop rivets

Fastener Locations 

Stramit® Curved Corrugated cladding can be fixed with either 3 or 5 fasteners per sheet at each batten/purlin to meet the required performance values, as shown on page 9 of the Stramit® Curved Corrugated & Bullnose Roof Cladding Product Technical Manual.

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