Steel Roofing Sheets : Choosing The Best Roof For Your Project

9 June 2023

Which Metal Roof Sheets are better- IBR or Corrugated?

IBR or Inverted Box Rib is considered a stronger roof profile than Corrugated Roof Sheets because of the flat angles of its square, fluted profile. Corrugated iron is a steel roofing sheet, and has a classic S-rib profile. IBR is currently the most popular corrugated roofing sheet, given its high strength-to-weight ratio, optimal loadspan and highly effective drainage.

Steel Roofing Sheets : Choosing The Best Option

Corrugated roof sheeting


Corrugated roof sheeting is the most commonly used S-rib roofing profile for roof sheets. This profile is ideal for a number of applications, giving you a strong and structurally sound steel roof sheet for your roofing needs.


Corrugated sheeting provides efficient water runoff, withstands different weather conditions, and can enhance the aesthetic appeal of buildings.

IBR roof sheeting


IBR stands for Inverted Box Rib. IBR roof sheeting is a square fluted roof profile, ideal for large construction projects including commercial, industrial, agricultural and residential applications.


IBR is known for its strength, low maintenance requirements, and aesthetic appeal, making it a popular choice for residential, commercial, and industrial roofing applications.

Widespan roof sheeting


Widespan roof sheeting is generally a more affordable and economical option, where the profile offers greater spans and lower roof slopes, for cheaper manufacturing.

Chromadek roof sheeting


Chromadek sheeting is a durable and visually appealing roofing material used in construction. It consists of a galvanized steel substrate coated with zinc, aluminium, and a paint system.


Chromadek sheeting is a popular choice for roofing and cladding applications, providing long-lasting protection and enhancing the visual appeal of buildings.

NJR Roof Sheets

NJR Steel branches stock a wide range of high-quality roofing products. Our steel roofing products are readily available and consist of corrugated, Widespan, and IBR steel roofing profiles with thicknesses ranging from 0,25-0,58 mm. 


We offer cranking and bullnosing services for IBR and Widespan to ensure profiles are manufactured to your specifications. NJR Steel-Roofing Products (Pty) Ltd have draftsmen available to calculate and supply a bill of quantities on CAD.


These products are supplied to multiple industries including builders, roofing contractors, merchants, low-cost housing developments and the DIY markets.


NJR’s steel roofing solutions are available in a galvanised finish or various Chromadek colours.


Find out more about our different roofing options:

The Evolving Role of Steel Merchants in South Africa’s Industrial Construction Sector

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Industrial construction in South Africa is undergoing a period of significant change, driven by tighter project timelines, evolving specifications and increasing pressure on procurement teams to deliver efficiently. As the SAISC notes, “industrial projects demand more than competitive pricing alone.” Today, reliability, responsiveness and supply certainty have become central to keeping projects on schedule and maintaining confidence across the value chain. This shift has placed new expectations on steel merchants, whose role now extends far beyond material supply.  The modern industrial customer requires partners who understand project pressures, anticipate procurement challenges and provide solutions that simplify coordination across multiple phases of construction.

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The Made of Steel Challenge Is Back for 2026 — Here's What's Changed

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A Bold New Chapter for South African Poultry Farming: NJR Steel’s Role in Tahila Broilers

12 May 2026
700,000 birds. 10 massive houses. One groundbreaking vision. 🚀🏗️ The South African poultry sector just took a massive leap forward with the launch of Tahila Broilers. This isn’t just another farm, it’s one of the most technologically advanced broiler operations in Africa, and NJR Steel Potchefstroom is proud to have been a part of it. From the structural steel to the specialized roofing, we helped turn Chris Travers’ "precision engineering" vision into a reality. 🇿🇦✨

NJR Steel: Your One-Stop Shop for More Than Just Steel

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NJR Steel Paint: The Finish That Seals, Protects, and Lasts

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Steel needs strength—but it also needs protection. That's where a proper finish makes all the difference. Whether you're painting fencing, roofing, trailers, or gates—NJR Steel has the paint to seal, protect, and finish the job right.  We stock a full paint range—from tough primers to vibrant, durable topcoats.

NJR Roofing Solutions: Versatile Profiles for Ultimate Protection

9 December 2025
Roofing a building requires more than just materials — it demands reliability, durability, and sheets cut to the right length you can trust.  That’s why NJR Steel offers a comprehensive range of quality roofing profiles—a system built to deliver protection without compromising on speed and service.

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3 November 2025
We recently wrapped up our NJR Made of Steel DIY Challenge, and we were absolutely blown away by the incredible creativity and craftsmanship that South Africans brought to the table. We asked you to show us what you could build, and you truly delivered. One thing, in particular, became crystal clear: South Africans love to braai. It’s no secret that the braai is a core part of our national identity. It’s where we gather, where we celebrate, and where we share stories.  This passion was the undeniable theme of our competition, with the vast majority of entries being some form of a custom-built, one-of-a-kind DIY braai. From complex smokers to portable wonders and everything in-between, the entries made the entire competition feel uniquely South African. We at NJR Steel were incredibly impressed by the ingenuity and passion that went into every single project.

NJR Defence in Action: The Steel Security System You Can Trust

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Security today requires more than just a barrier — it demands strength, visibility, and durability you can trust. That’s why NJR Steel developed the NJR Steel De-fence range — a modular fencing system that delivers high-performance protection without compromising on design.

Ride For A Purpose: The NJR Steel & Seeds of Africa Initiative

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This past October 26th, the streets of Joburg were alive with the familiar energy and excitement of the 94.7 Ride Joburg. For the NJR Steel team, however, this race represented something far greater than just kilometers and finish times. It was a "Ride For A Purpose," a powerful initiative dedicated to championing the incredible work of Seeds of Africa . This wasn't just about cycling; it was about community. It was about channeling the determination and endurance of a cycling race directly into the hands of those building a better future.