It’s easy to marvel at the raw strength of steel in a building’s skeleton—those upright columns and beams that seem to declare permanence.
But strength is only half the story. In a fire, steel is vulnerable. At around 550°C, it begins to lose its load-bearing capacity. And in modern structures, that tipping point can arrive in minutes.
That’s why structural steel columns must be protected—and one of the most effective ways is through fire boarding, a critical aspect of Passive Fire Protection (PFP).
Let’s explore what fire boarding is, why it matters, how it’s best implemented on-site, and what the future holds for this under-appreciated hero of fire safety.
What is Fire Boarding?
Fire boarding is the method of enclosing structural elements—most commonly steel columns and beams—in fire-resistant board materials. These boards are manufactured to specific standards (such as BS EN 1363 or BS 476 in the UK) and are designed to insulate steel from the intense heat of a fire.
These boards are usually made from calcium silicate, gypsum, or mineral-based materials and are fitted in such a way as to create a tight, sealed encasement. The objective? Delay heat transfer to the steel, preserving its structural integrity long enough to allow evacuation, firefighting, or suppression to occur.
Why Fire Boarding Matters for Fire Safety
Fire boarding plays a pivotal role in compartmentation, helping to contain fire within a designated zone and prevent structural collapse.
Unprotected steel can buckle or fail in under 10 minutes during a fire. With correctly installed fire boarding, this resistance can be extended to 30, 60, 90 or even 120 minutes—depending on the fire resistance rating required by the building’s design.
Without it, the consequences are stark:
• Faster structural failure
• Increased risk to occupants and emergency responders
• Greater damage to property
• Potential prosecution for non-compliance
Fire boarding literally gives you time—time to escape, time to fight the fire, and time to prevent catastrophic collapse.
Best Practices for Fire Boarding in Modern Construction
Fire boarding is only as effective as its installation. Here’s what best practice looks like on site:
• Use tested and certified systems. Always specify fire boards that have been tested as part of a complete system, not just standalone boards.
• Follow manufacturer guidelines. Each board product will have a unique method of fixing and joint sealing—stick to it rigidly.
• Seal all joints and penetrations. Gaps, even small ones, are the Achilles’ heel of any fire protection system.
• Support the boards correctly. Boards must be supported on framing systems that won’t fail before the board itself.
• Inspection and QA checks. A robust quality assurance process ensures that what’s drawn is actually built—and performs as designed.
How to Ensure Compliance with UK Fire Regulations
In the UK, compliance with Approved Document B of the Building Regulations is essential, alongside BS EN standards for fire testing.
Key points include:
• Fire resistance periods must match the building’s risk profile.
• All passive fire protection systems must be third-party tested and ideally, installed by accredited contractors (e.g., FIRAS, BM TRADA, or similar).
• Document everything. Fire safety is moving toward a golden thread of information, meaning your installations must be logged, photographed, and traceable from design to occupation.
Working with specialists ensures you avoid the pitfalls of misinterpretation or substandard installation.
Common Mistakes to Avoid in Fire Boarding
Mistakes are costly—not just in pounds, but in lives. Here are the most common ones we see on-site:
• Cutting corners by using cheaper, uncertified board products.
• Improper fixing that doesn’t withstand thermal expansion during a fire.
• Poor jointing and inadequate sealing at the interfaces.
• Failing to coordinate with other trades, leading to boards being cut for M&E services post-installation.
• Lack of supervision or quality checks—a common issue on fast-track builds.
All of these can compromise the performance of the fire protection system, rendering it ineffective when it matters most.
Future Trends in Fire Boarding
As buildings become more complex and sustainability climbs the agenda, fire boarding is evolving. Expect to see:
• Pre-fabricated encasement systems designed off-site for rapid installation
• Eco-friendly board materials with lower embodied carbon
• Digital QA tools and 3D capture to create a verifiable record of installations
• Integration with BIM models, improving coordination with other disciplines
• AI-driven fire modelling, changing how we design fire resistance around steelwork
Passive fire protection is no longer just about ticking boxes—it’s becoming part of a building’s lifecycle strategy.
Conclusion
Structural steel gives us freedom to design bold, open, and efficient buildings. But with that freedom comes responsibility. Fire boarding ensures those vital steel columns stay standing long enough to protect lives and assets.
Done right, it’s invisible. But in an emergency, it’s the very thing that holds everything up—literally.
At JW Simpkin, we understand the importance of proper fire boarding. Our experienced team works across the UK, delivering certified, regulation-compliant solutions that don’t just meet expectations—they protect them.