What ‘primary test evidence’ do I need for a fire door?

When it comes to the safety and compliance of fire doors, there’s no room for shortcuts – or confusion. Yet, we’ve increasingly seen a misconception muddying the waters: the idea that a fire door must be burn tested in the exact configuration it will be installed to be considered compliant.

This belief, often tied to the term “primary testing,” can end up in costly, time-wasting, and ultimately unnecessary additional work.

This blog explores how third-party certified fire testing schemes are still the gold standard – and the concept of a ‘primary fire testing’ burn for every door is a total red herring.

The Myth of Primary Testing

Let’s start with the misconception: some developers or procurement professionals will insist that a fire door must undergo a bespoke burn test in its precise configuration – including finish, glazing, and dimensions – in order to be compliant. This insistence often stems from seeing the phrase “Primary Test Evidence required” in a Field of Application report – and the assumption that this phrase means only doors tested in that exact make-up are valid.

In reality, this isn’t what the phrase means at all.

What ‘Primary Test Evidence’ Really Means

In fire testing terminology, ‘primary test evidence’ refers to the base test data used to inform and support a Field of Application. Every fire door should be accompanied with its own Field of Application report which sets out the performance that can be achieved following successful fire testing.

It doesn’t mean every single variant of a door must be physically burned. Instead, it means that a core design has been successfully tested for fire resistance, and that test data can be used to extrapolate allowable variations – for example, different facing veneer or slight dimensional changes – which can be permitted under clearly defined and audited conditions, whilst maintaining the required level of fire performance.

This means manufacturers can safely avoid having to repeatedly test minor variants of the same design – an expensive and inefficient process.

The Power of Third-Party Certification

Rather than relying on burn testing every door, the industry gold standard is third-party certification. Reputable schemes like Certifire ensure that fire door manufacturers are working to tested and approved specifications, and that their processes are audited, documented, and controlled.

We work with Certifire for third-party accreditation, ensuring every product we supply meets or exceeds fire performance requirements, and continue to do so over time, keeping our customers safe.

A Certifire approved product has been tested, assessed, and inspected as part of an end-to-end quality system. These approvals often include a range of designs, materials, finishes, and sizes, based on proper testing and engineering.

Shifting the focus from one-off testing to consistent, proven performance data built over time actually represents a step up in fire safety – and peace of mind for developers, building control, and end-users alike.

The Cost of Redundant Testing

Insisting on bespoke primary testing for every door variant doesn’t enhance safety – it undermines it by introducing delays, spiralling costs, and logistical complexity.

• Cost: A full-scale fire test can cost between £15,000 and £20,000
• Time: Booking a slot and compiling results can delay a project by 6-8 months. There’s also no guarantee the door will pass the test on the first attempt, which can set things back even further.
• Value: The results are often redundant if the door already sits within the scope of an existing FoA report

In short, you pay more, wait longer, and gain nothing in terms of safety or compliance.

Focus on What Matters: Proven, Audited Compliance

At Stairways, we’re all about helping our clients understand what’s really required when it comes to fire door compliance – and giving them the tools to get it right without the hassle.

We only supply doors that are backed by trusted third-party certification schemes, with full traceability and documentation to match. That way, you know exactly what you’re getting – and that it’s fully compliant and up to the job.

So next time you’re specifying fire doors, remember, what matters is that the door has been tested, that there’s reliable evidence for its performance, and that its manufacture is tightly controlled under a recognised certification scheme. Requiring a new burn test for every spec isn’t just unnecessary—it’s a costly red herring.

Need help choosing the right fire door solution? Get in touch with our team here.