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Writer's pictureLTM Engineering
Apr 24, 20235 min read

ArcelorMittal South Africa Chromadek: The Superior Roofing Solution

Updated: Jun 11, 2023


When it comes to choosing the right material for your roofing and cladding needs, it can be a daunting task to sift through the myriad of options available. Among those options is Chromadek, a high-quality product manufactured by ArcelorMittal South Africa. At its core, Chromadek is a Color Coated Material for roofing and cladding applications, which has been trusted by professionals for over 35 years.





ArcelorMittal Chromadek product brochure


Chromadek Facts


Chromadek® has a minimum zinc coating of Z200, while Chromadek Ultim® has a minimum zinc coating of Z275. The paint system used for the coating is designed to withstand the harsh African sun (UV environment). There are now four heat reflective colors available for Chromadek® and Chromadek Ultim®, thanks to ongoing paint development.


Why choose chromadek roof sheeting


The advantages of Chromadek® roof sheeting include better edge protection and reduced risk of formability cracking that could cause corrosion issues. All Chromadek® and Chromadek Ultim® sheets are labeled on the back. Only ArcelorMittal South Africa produces Chromadek®, which is a registered trademark. Choosing Chromadek® means the product has undergone thorough testing and comes with technical support.



Features and Benefits


Chromadek boasts a range of features that make it an attractive choice for architects, engineers and builders alike. At the forefront is its unparalleled resistance to corrosion and color fading, ensuring a long-lasting and aesthetically pleasing finish. In addition, its superior durability, strength and ease-of-installation make it a popular choice for commercial, industrial and domestic use.

From a sustainability perspective, Chromadek also offers a range of benefits. For instance, being a lightweight material means that it requires less energy to transport and install compared to heavier options. It is also made from recyclable materials and can be repurposed at the end of its life, reducing its overall environmental impact.




Chromadek Applications


Chromadek's versatility is apparent in its numerous applications across a range of industries. Its popularity stems from the fact that it can be used for roofing, cladding and even gutters. This flexibility makes it a go-to choice for projects that require uniformity in design, such as warehouses, agricultural structures, and low-cost housing.


Despite being a lightweight option, Chromadek is also an ideal solution for areas that experience high winds, as it has the ability to be easily installed on roofs with a low pitch. Additionally, its wide range of colors means it can be customized to suit any design aesthetic, enhancing the overall appeal of a project.


Considerations when using Chromadek


When choosing Chromadek as your preferred roofing and cladding solution, it is important to note that installation should be done by qualified professionals. This will ensure that the material is installed to the required specification, and that warranties and guarantees are in place.


It is also important to consider the overall cost and available contractors for installation. While Chromadek is a superior product, its initial cost may be higher than certain alternatives. Regardless, the long-term benefits of using Chromadek, such as its durability and resistance to environmental factors, make it a wise investment in the long run.



Cromadek handeling and protection



Taking care of your chromadek roof sheets


  • After you finish the roof, make sure to clean or get rid of any metal residue such as loose fasteners, pop-rivet mandrills, and metal drillings/objects. Failure to do so may heighten the risk of corrosion.


  • To avoid corrosion, it is important to prevent damage to the paint coating. Severe damage can increase the risk of corrosion, especially in areas where it is already present such as overlapping sheets and sheet ends. To prevent further corrosion, thoroughly clean any corroded edges and repaint them in a timely manner.


  • If you need to paint a Chromadek® roof, you can do so by using the right roof preparation method and paint system. You can consult Arcelor Mittal South Africa for advice and to get referred to roofing finishers who are approved and reputable.


  • When walking on roofs, it is better to use soft contact instead of abrasive contact.


  • Regular cleaning and washing of roofs are recommended as part of scheduled roof maintenance.

  • The appropriate type and class of fasteners must be utilized for a particular region and application.

  • For installing solar panels, it is advised to use galvanised fixtures. However, it is important to use the proper class of fastener and ensure metal compatibility.

  • To cut Chromadek® roof sheets, it is recommended to avoid using angle grinders to prevent swarf and sparks. Instead, suggested alternatives are using circular saws and nibblers for cutting.


  • To avoid damaging the roof sheets and coils, it is important to store them indoors in a covered and enclosed storage area. Do not leave them outside in wet conditions. Make sure the storage area has proper ventilation.


Make a Sustainable Choice with Chromadek® Steel Roofing


If you're looking for a green choice in roofing materials, Chromadek® steel roofing solution is your answer. What sets Chromadek® apart from other color-coated roofing systems is that they have eliminated the use of chrome in both the pre-treatment and primer applied in their product, Chromadek®. This innovative process helps to eliminate the production of chrome-containing effluent, making the entire manufacturing process more sustainable with controlled chrome emission.


By choosing Chromadek® or Chromadek Ultim®, you’re choosing to make a conscious effort towards a sustainable future. ArcelorMittal South Africa is committed to creating every coil of Chromadek® for roofing and cladding in a way that makes a sustainable difference in the environment.




Cromadek colours



Chromadek colour chart as on the ArcelorMittal South Africa website



Chromadek Data sheets


ArcelorMittal South Africa conducted tests on chromadek- here are the results


Visit ArcelorMittal South Africa website link -








Chromadek by ArcelorMittal South Africa is a superior roofing and cladding solution that combines durability, versatility and sustainability. With its resistance to corrosion and color fading, it ensures a long-lasting and aesthetically pleasing finish. As a lightweight option, it also offers energy efficiency and environmental benefits. Its ability to be customized makes it a go-to choice for architects and engineers across a range of industries.


If you want to learn more about Chromadek and other roofing solutions from ArcelorMittal South Africa, visit their website.



Where you can buy Chromadek roof sheeting











Newcastle Steel Works - (011) 760 8650 | nswismail@mweb.co.za






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