Stramit’s Corrugated cladding is a traditional roofing profile enhanced by modern materials and finishes.
Features and Benefits
- Lightweight and easy to handle
- Cost-effective to use and quick to install
- 5 degree minimum roof pitch to suit most traditional applications
- Uses conventional through-fixed screws
- Available in an extensive range of colours
Colour Options and Finishes
Base Material Thickness (mm): 0.42, 0.48, 0.60
Finish: COLORBOND® , ZINCALUME®, Galvanised
Standard Steel
Ultra Steel
SuperDura™ Stainless Steel
Other Finishes
Matt Steel
MagnaFlow®
UniCote® LUX
Certain colour options and finishes may be subject to availability and lead times may vary from site to site. Please contact your local Stramit office to confirm.
Buy At Mitten Vinyl Australia
Get the Stramit® Corrugated Roof and Wall Cladding at Mitten Vinyl Australia, we are Stramit's official stockists. Simply fill in your requirements in the below form and we will be in touch with you.
Availability
This product is produced in NSW and is available in VIC, NSW and South East QLD. Availability and lead times may vary depending on your location.
General Information
Stramit® Corrugated Roof and Wall Cladding gives excellent durability in almost all locations. However, it is important to choose the correct coating for each application environment. Durability recommendations do vary based on the application of the product in roofing or walling installations.
All building products need to be checked for compatibility with adjacent materials. These checks need to be for both direct contact between materials, and where water runs from one material to another.
The following guidelines generally avoid material incompatibility:
- For zinc-aluminium alloy coated steel, colour coated steel and galvanised steel cladding avoid copper, lead, green or treated timber, stainless steel and mortar or concrete.
- Galvanised steel sheets should not receive drainage from aluminium or any inert materials, such as plastics, glass, glazed tiles, colour coated and zinc-aluminium alloy.
Stramit’s roofing and walling products should be handled with care at all times to preserve the product capabilities and quality of the finish.
Packs should always be kept dry and stored above ground level while on site. If the products become wet, they should be separated, wiped and placed in the open to promote drying.
Stramit® Corrugated Roof and Wall Cladding is supplied cut to length. When designing or transporting long products ensure that the length is within the limit of the local Transport Authority regulations.
The manufacturing tolerance on the length of product supplied is +0, -15mm.
Stramit products conform to the following Australian standards that are called up in the NCC.
Steel material
All metallic coated steel complies with AS 1397
Painted steel product conforms with AS 2728
Roofing / Walling products
Roofing/walling profiles conform with AS 1562.1, and AS 4040 parts 0, 1, 2 and 3.
Corrugated roofing conforms with AS 1445
Wind Load data conforms to AS 1170 part 2, and/or AS 4055
Fasteners conform with AS 3566
Installation details are in accordance with the Standards Australia Handbook HB39
Stramit’s roofing and walling products are protected in Australia by registered designs.
All Stramit roofing and wall cladding products conform with, or are equivalent to, AS1562.1.
Stramit has in-house, purpose built testing equipment used to design, develop and improve products for the Australian market. Many of our products are tested or witnessed by independent organisations. These include:
- University of Technology, Sydney
- Cyclone Testing Station (James Cook University)
- The University of Sydney, and
- CSIRO.
The ongoing research and development activity ensure we remain at the forefront of innovation, design and consumer information.
Technical Information
Please refer to the Stramit Roof and Wall Flashing Architectural Detailing Design Guide.
The roofing/walling shall be 0.42 (or 0.48) mm BMT Stramit® Corrugated Roof and Wall Cladding in continuous lengths with sinusoidal ribs 16mm high, spaced at 76.2mm centres in accordance with AS1445. Sheeting material shall be protected steel sheet to Australian Standard AS1397, with a minimum yield stress of 550MPa (Grade G550) and an AM100/AZ150 coating with or without an oven-baked paint film of selected colour, or a plain AM125/AZ150 coating.
The sheeting shall be fixed to the purlins/girts in accordance with the manufacturer’s recommendations. Suitable fixing screws in accordance with Australian Standard AS3566, Class 3, shall be used at every support with side lap fasteners installed at mid span if required. Sheets shall be laid in such a manner that the approved side lap faces away from the prevailing weather.
A minimum of 50mm shall be provided for projection into gutters. Flashings shall be supplied in compatible materials as specified; minimum cover of flashing shall be 150mm. All sheeting shall be fixed in a workman-like manner, leaving the job clean and weathertight. Repair minor blemishes with touch-up paint supplied by the roof manufacturer. All debris (nuts, screws, cuttings, filings etc.) shall be cleaned off daily. NOTE: 0.60mm G300 Corrugated has a 300MPa steel grade.
Class 4 fasteners should be used <1km from the coast.
A NATSPEC work section is available for this product. Download
Cyclonic Data for Stramit® Corrugated Roof and Wall Cladding can be found in the Stramit Cyclonic Areas Guide.
Information on the use of Stramit® Corrugated Roof and Wall Cladding in the Darwin area can be found in deemed-to-comply sheets Nos M/149/01 and M/239/01. These are available from Stramit or on the NT BAC website.
Stramit® Corrugated Roof and Wall Cladding can be fixed with either 3 or 5 fasteners per sheet at each batten/purlin to meet the required performance values.
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 less than 1.5mm thickness refer to Stramit® Top Hats & Battens Product Technical Manual.
The Stramit Cyclonic Areas Manual has fixing details for cyclonic areas.
Foot traffic limits for Stramit® Corrugated Roof and Wall Cladding are shown for 3 alternative foot traffic categories:
High Maintenance – for applications with repeated maintenance, particularly where personnel may be unfamiliar with correct procedures for walking on metal roofs.
Normal – based on traditional expectations, with moderate maintenance foot traffic using designated footpaths.
Controlled – spans that confirm to AS1562.1 with 1.1kN load specified in AS/NZS1170.1 for R2 – Other Roofs. These require minimal careful foot traffic only on the designated footpath. Suggested for use only where occasional aesthetic imperfections from foot traffic are acceptable.
Tables are based on tests to AS1562.1 and AS4040 parts 0 and 1.
For more information on foot traffic performance of Stramit’s roofing profiles refer to Stramit’s Foot Traffic Guide.
Stramit® Corrugated cladding is manufactured from G550 or G300 colour coated steel, aluminium-zinc-magnesium or zinc-aluminium alloy coated steel. In some locations galvanised and severe environment colour coated steel may be available by arrangement.
Colour coated steels are in accordance with AS2728 – Category 3 and, for the substrate, with AS1397. Aluminium-zinc-magnesium alloy coated AM100/AM125, zinc-aluminium alloy coated AZ150 and galvanised Z450 conform to AS1397.
Stramit has a comprehensive range of colours as standard. Ask your nearest Stramit location for colour availability.
The profiles of G300 and G550 Corrugated cladding may vary and should not be used in overlapping configurations.
The minimum roof slope for Stramit® Corrugated Roof and Wall Cladding is 5 degrees (1 in 12).
The spans shown below take account of normal foot traffic and wind resistance including local pressure zone effects. Pressures are based on AS4055 or AS1170.2.
Where the two standards differ, the worst case has been taken for each classification. Data should only be used for buildings 7m or less in height, 1000m2 or less in area and unaffected by land topography.
*Where roof pitch is less than 10 degrees, use spans given in red italics for roof corners.
Internal spans must have both end spans 20% shorter.
TC – Terrain Category. FS, PS, NS – Full, partial and no shielding. Internal pressure coefficient +0.2/-0.3. Values are only valid for use with steel members of 1.5mm or thicker. Where thinner supports are used, fastener capacity must be checked. refer to Stramit® Top Hat & Battens Product Technical Manual for more information.
For more specific applications Stramit® Corrugated cladding must be designed to the pressure and foot traffic limits indicated.
Roof spans may exceed those shown in this table provided the wind pressure and foot traffic limits are not exceeded.
Stramit® Corrugated Roof and Wall Cladding can be spring-curved, concave or convex, including curved ridges, provided it is sealed at the apex, and within the recommended limits below.
*At these radii a maximum support spacing of 900mm applies, and limit state pressure capacities are reduced by 14% for serviceability and 7% for stregth. These reductions apply proportionately up to the lowest neutral radius. Minimum 5 fasteners required per sheet at ends.
The Stramit Spring Curving Guide has more detailed information.
All metal roof sheeting is subject to thermal expansion and this needs to be accommodated where there is a temperature difference between the sheeting and the structure.
The colour of the sheeting will affect the amount of thermal expansion, and whether the sheet is flat or cured will affect its ability to resist without problems. Sheet lengths should be limited as follows.
Stramit® Corrugated Roof and Wall Cladding has limited water-carrying capacity. Roof slopes can be as low as 5° for many applications.
Roof run lengths are the combined lengths of all roof elements contributing to a single pan drainage path. This can include the roof length upstream of a roof penetration that concentrates flow into other pans.
The table below gives slopes for 100 year return period rainfall intensity.
Based on AS1562.1
Stramit’s Roof Slope Guide provides additional information.
Derived from testing, the following tables give the wind load resistance for both serviceability and strength limit states. Values are only valid for use with steel support members of 1.5mm or thicker.
Installation Information
Stramit’s cladding can be easily cut, where required, using a power saw with a cold cut saw blade or a power nibbler and, for localised cutting, tin snips. Avoid the use of abrasive discs as these can cause burred edges and coating damage. Please dispose of any off-cuts carefully and thoughtfully.
Commence installation from the bottom of the area to be covered:
- Use a string line to correctly position starter clips which are attached using the recommended fastener to the stud framing.
- Hinge the bottom edge of the profile under the clips and swing the panel up against the wall frame.
- Use the recommended fasteners to attach the top of the panel to the frame. Hint: Maintain upward pressure during this operation to ensure full engagement with the clips.
- Hinge the next panel in under the profiled groove in the top of the first panel, swing up and attach as before.
- Continue installing sheets to the top of the wall.
Maintenance Information
Care & Maintenance
Below are some handy hints and tips to achieve maximum life from your COLORBOND® and ZINCALUME® finished products.
- In areas of little rainfall, products should be cleaned regularly.
- Brick cleaning acid should not come into contact with steel fascia, gutter, or roofing and walling.
- Never immerse these products in sand, soil or concrete.
- Do not use touch up spray can paint on COLORBOND® steel.
- Remove metal debris from cutting and/or drilling to avoid swarf damage.
- Prior to installation, keep bundled material dry.
- Prepainted metal roofing components should be stored in the shade as the protective plastic film will become difficult to remove if it is exposed to direct sunlight.
- Make sure materials made of different metal, such as copper and lead, do not make contact with these products, and water does not run from one to the other.
- Roofing and guttering should be free draining and free from dirt and leaves.