IBR ROOFING: BUILT FOR SOUTH AFRICAN CONDITIONS

Nick Laubscher
Aug 7
3 min read

When it comes to reliable, high-strength roofing in South Africa, few profiles are as trusted as IBR (Inverted Box Rib). With its distinctive trapezoidal flutes and stiff structural design, IBR remains a preferred profile across industrial, commercial, and residential sectors.

At Youngman Roofing & Insulation, we provide high-quality IBR sheeting that is manufactured to strict standards and available across South Africa. Our sheeting is carefully cut to size, ready for quick delivery, and supported by reliable service you can depend on.

WHAT IS IBR ROOFING AND WHY IS IT POPULAR?

IBR is a trapezoidal-profiled metal sheet with prominent ribs designed for increased strength, water runoff, and simple installation. Initially developed for industrial roofs, it has proven just as effective in commercial buildings, schools, and affordable housing.

Its fluted structure provides load-bearing capacity and efficient water drainage, even in regions with heavy rainfall and strong winds.

TECHNICAL SPECIFICATIONS: IBR ROOF SHEETING

Our IBR profile is available in a range of finishes and thicknesses, tailored to meet the specific needs of your project.

TYPICAL PROFILE DETAILS:

Cover Width: ±686 mm

Rib Height: ±36.5 mm

Rib Pitch: ±171 mm

Steel Thickness: 0.4 mm to 0.8 mm

Available Materials: Galvanised Steel, Zincalume®, Chromadek®

Applications: Roofing and cladding for industrial, commercial, agricultural, and residential projects

Formed to Length: Minimises waste and speeds up installation

Important Note: Although IBR sheeting cannot be curved due to its rigid trapezoidal profile, it can be bullnosed or cranked depending on structural design requirements. For applications that require a fully curved finish, corrugated sheeting is a better choice as it supports cranking, curving, and bullnosing with ease.

PERFORMANCE & ENERGY COMPLIANCE

When used in conjunction with reflective or bulk insulation, IBR sheeting enhances thermal performance and reduces energy consumption. This helps your project meet SANS 10400-XA energy efficiency standards, supporting compliant and eco-friendly construction.

Durable coatings, such as Chromadek®, ColorPlus®, and COLORBOND®, also enhance UV and corrosion resistance, particularly in coastal or industrial environments.

WHERE IS IBR USED?

Warehouses and factories
Agricultural sheds and workshops
School and community buildings
Low-cost and site housing
Vertical or horizontal cladding
Fencing, gates, and boundary walls

It’s a versatile profile trusted by contractors and architects for dependable, long-span performance.

FIXING METHOD, FASTENER COUNT & INSTALLATION TIPS

IBR sheets are fixed through the crest (rib) using washered fasteners for optimal weatherproofing, with a minimum roof pitch of 5°. For cladding applications, it can be installed vertically or horizontally.

KEY INSTALLATION TIPS:

Crest-fix fasteners required
Side lap: 1 flute recommended
End lap: Minimum 200 mm (depending on slope)
Purlin spacing: Project-specific – we can advise
Recommended Fastener Usage: 5 fasteners per square metre for secure installation and wind resistance

Youngman stocks CORROSHIELD® Hex Washer Flanged self-drilling fasteners. Bonded washers can be included for optimal waterproofing.

We also provide a full range of flashings, fasteners, closures, and insulation to complete your system professionally.

SANS COMPLIANCE: BUILDING WITH CONFIDENCE

All our IBR profiles are produced in accordance with South African building legislation. These standards guarantee that you meet performance, safety, and structural requirements on every project.

SANS 10400-L:2011 –Roofs: Sets the minimum design and construction requirements for roof systems, including weatherproofing, drainage, and loading.
SANS 10237 – Self-Supporting Metal Roof and Wall Cladding: Governs the performance, testing, and installation of profiled sheeting, such as IBR.
SANS 1273:2011 – Fasteners for Roof and Wall Coverings: Specifies strength, corrosion resistance, and sealing requirements for compliant fastening.
SANS 10400-XA:2011 – Energy Efficiency: Ensures that when insulation is added, the whole roofing system contributes to reduced energy use.

These standards are critical for project approvals and guarantee long-term performance in local conditions.

WHY CHOOSE YOUNGMAN IBR SHEETING?

Precision manufacturing from quality steel
Nationwide support and cut-to-length service
Backed by decades of industry experience
Fully compliant with national standards
Competitive turnaround times and pricing
Supplied with compatible insulation and accessories

IBR remains a benchmark for reliable, cost-effective roofing and cladding across South Africa. With proven performance in harsh conditions, compliance with national standards, and broad compatibility with insulation and finishes, it continues to support quality constructions from start to finish.

At Youngman Roofing & Insulation, we don’t just supply profiles; we help construct systems that endure.

Let us make your next project easier. Request a quote, speak to our technical team, or get the right advice to move forward quickly.

T: +27 (0) 21 511 8125 | E: info@youngman.co.za