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Corrugated Iron | Corrugated Roof Sheets - All you need to know

Updated: Jul 26, 2023


An image of a new Colorbond Corrugated Roof

Corrugated Roofing Iron has been a popular choice for homeowners and builders for many years. As you explore the world of roofing materials, it's essential to understand the advantages and limitations of each option. In this blog post, we'll dive into the world of Corrugated Roofing Iron, exploring its history, uses, and pros and cons. By the end, you should have a better understanding of whether this material is right for your project. We have prepared this article to provide you with the relevant information in regard to what corrugated iron roof sheets can be used for, their durability, general availability & technical specifications. We have organized the information that we have collected through our extensive research into this bullet list.

Don't forget to check out our Buyers Guides where you can compare the different roof sheet profiles and more.

 


Corrugated Iron Roof Sheet Product Information

Corrugated Iron refers to a type of roofing material that features a wavy pattern, known as a corrugated profile. This design gives the sheets added strength and rigidity. It was first developed in the early 19th century, and since then, it has become a popular choice for roofing and cladding applications around the world. Corrugated iron roof sheets are classed as a “made-to-order product” by the manufactuers such as Stramit. They can be rolled and made from many different metals. This can make it hard for suppliers to keep these in stock as there are so many colours available and a large number of lengths, which when multiplied can exceed most hardware suppliers' storage capacities. They can be ordered in a variety of thicknesses, the most common being .42BMT (base metal thickness).

This image is of the Colorbond Colour Chart

They can be made from Colorbond (Australian-made steel with a composite layer of Aluminium & Zinc for protection, finished with a baked paint in a wide variety of colours), Zincalume, aluminum, stainless steel or galvanized.


Easy-to-use warranties for Colorbond do vary depending on your distance from the ocean. You can visit the warranty calculator supplied by BlueScope steel and use it to work out which material would be best suited for your situation.

Manufacturers purchase the flat coil rolls from BlueScope Steel & roll the flat coil into the corrugated shape. Each manufacturer's corrugated profile can vary so it is important to consider using a manufacturer with a large national network like “Stramit” to ensure if you need a replacement sheet down the track that it will be easy to obtain. Each manufacturer’s technical specs can also vary so it’s important to do your research in relation to the task you intend to use it for prior to purchase. Corrugated sheets can be





Corrugated Roof Sheets - What uses does it have?


This is an image of a new Colorbond roof that has been installed on a domestic property.

Corrugated Roof Sheets are versatile and have a wide range of applications, including:

  • Roofing: The primary use of corrugated sheets is for roofing applications, thanks to their durability and weather resistance.

  • Wall Cladding: Corrugated sheets can also be used as wall cladding for a unique, coastal look.

  • Garden Beds: Their durability makes them a popular choice for constructing raised garden beds.

  • Ceilings: Corrugated iron can be used as an unconventional ceiling material, adding texture and style to a room.

  • Fencing: The sheets can be used as an alternative fencing material, providing both privacy and an attractive aesthetic.

  • Box Gutter Support Boards: Corrugated sheets can be used to create strong, sturdy support for box gutters.

Using corrugated sheets comes with various benefits, such as being lightweight, easy to install, and suitable for various environments and building types.



What are the limitations of metal corrugated sheets?

Despite their versatility, Corrugated Roofing Sheets do have some limitations:

  • Installation challenges: The corrugated design can make the installation process more challenging, particularly when walking on newly installed roof sheets.

  • Maintenance requirements: Over time, Corrugated Roofing Sheets may require repainting or re-coating to maintain their appearance and protection against the elements.

  • Not suited for lower pitches: Corrugated iron is not recommended for roofs with pitches below 5 degrees, as water may not drain effectively and leaks may occur at the sheet laps.

  • Smaller spans between battens: The corrugated profile typically requires closer batten spacing compared to alternative roofing profiles, which can increase the overall cost of the roofing structure.

Corrugated roof sheets can be ordered not only in different materials but also in different BMTs (base metal thickness) and therefore we haven't included the full list of technical specs and minimum requirements in this document. It is always our recommendation that you hire the help of a licensed roofing professional when it comes to installing any roofing products. We have taken the time to compile a list of the top 5 roofers nearby who have been screened and verified through our Screening & Selection Criteria.


Pros and Cons of Corrugated Roofing Iron

Pros:

  • Lightweight, easy, and fast to install: The sheets are relatively light and easy to maneuver, making installation quicker and more manageable.

  • Aesthetic appeal: The corrugated profile offers a classic and visually appealing design.

  • Cost-effective: Compared to other roofing materials, corrugated sheets are generally more affordable.

  • Wide availability: Corrugated sheets are widely available from various manufacturers and suppliers.

  • Available in Colorbond.

Cons:

  • The smaller span between battens: The sheets typically require closer batten spacing, which can impact the overall cost of the roofing structure.

  • Limited to a minimum pitch of 5 degrees: Not suitable for roofs with pitches below 5 degrees.

  • Can dent easily when walked on: Care must be taken when walking on corrugated sheets, as they can be prone to denting.


Alternatives to corrugated sheets

While corrugated roofing sheets have their advantages, it's crucial to explore other options before making a final decision. Here are some popular alternatives to consider:

Each of these alternatives has its own set of advantages and disadvantages, and it's essential to weigh your priorities when choosing a roofing material. Consider factors such as aesthetics, durability, maintenance requirements, and cost to find the best option for your project. You can visit our comprehensive Buyers Guide where we provide easy-to-follow product comparisons, research, and links for different purchasing options and more.



Conclusion

Corrugated Roofing Iron has long been a popular choice for its versatility, cost-effectiveness, and visual appeal. However, it's crucial to understand its limitations and consider alternatives before committing to a particular roofing material. By carefully considering your project's needs and exploring various options, you'll be better equipped to make an informed decision.

For more information on Corrugated Roofing Iron and other roofing materials, be sure to visit our buyer's guide, where you can compare product options and find the best solution for your project. Remember, research is key to ensuring you choose the right roofing material for your needs, so take your time and explore all the possibilities.


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