08 Jul 2026

Why Betting on BBA Alone Is Now an Industry Risk

In the latest RADIX Opinion Piece, Managing Director Callum Milne examines why reliance on BBA Agrément certification as the sole measure of compliance has become an industry risk. In light of recent developments affecting the BBA, he explores why engineering-led validation, independent testing, and project-specific verification provide a more resilient and technically robust approach to foundation specification and Building Control acceptance.

For several years, RADIX has been raising a straightforward question with Building Control bodies across the UK: why is BBA Agrément certification treated as the only acceptable route to compliance for screw pile and ground screw foundation systems?

We have consistently argued that this position is not supported by established UK engineering practice, that it excludes systems with equivalent or superior technical validation, and that it introduces unnecessary risk into the procurement and specification process. A certification-only model is not more rigorous, it is simply more convenient for those who prefer a single checkbox over genuine engineering assessment.

Recent events have sharpened that argument considerably.

The BBA Is Currently Operating Without UKAS Accreditation

On 26 February 2026, UKAS notified the British Board of Agrément that its accreditation had been temporarily suspended. The suspension affects all activity carried out to the four principal accreditation standards – BS EN ISO/IEC 17020, 17021, 17025, and 17065 – which together cover inspection, management system certification, testing, and product certification. In plain terms, this means the BBA is currently unable to deliver accredited testing, inspection, or certification activities.

The BBA has confirmed on its website that this situation arose from a corporate restructure that took place on 1 July 2025, and that no concerns have been raised regarding the organisation’s technical competence. The BBA is appealing the decision and is working with UKAS toward resolution. Both parties have stated publicly that they are engaged in the process.

The BBA has also confirmed that all previously published certificates remain valid and will continue to be maintained.

We are not suggesting otherwise. This article is not an attack on the BBA, whose long-standing role in UK construction certification is well understood. But the situation raises a question that every contractor, engineer, and specifier who relies on BBA certification as their sole compliance pathway should be asking right now.

The Three-Year Review Problem

BBA Agrément certificates are not issued indefinitely. They carry periodic review requirements, typically every three years, to confirm that the certified product, its manufacturing processes, and its installation conditions continue to meet the standards against which the original certificate was granted. These reviews are not administrative formalities; they are the mechanism by which a certificate maintains its integrity as a live assurance document rather than a historical snapshot.

The implications of the current accreditation suspension for certificates approaching or due for their three-year review are unclear. Any review activity carried out by the BBA while operating outside UKAS accreditation would not be conducted under accredited conditions, a material distinction for anyone relying on that certificate to satisfy a Building Control requirement predicated on independent, accredited certification.

Certificate holders and those specifying on the basis of BBA certification should be seeking clarity directly from the BBA on how reviews scheduled during this period will be handled, and whether the resulting certificates will carry the same standing as those reviewed under full accreditation. This is not a question that can be deferred to post-project.

This Is What a Single-Pathway Dependency Looks Like

The BBA suspension has not, to our knowledge, caused any certificates to lapse or products to become non-compliant overnight. But it has exposed precisely the structural vulnerability that a certification-only acceptance model creates: a dependency on a single external body whose status can change, for reasons entirely outside the contractor’s or specifier’s control, leaving those who have built their compliance strategy around that body with limited alternatives.

This is not a hypothetical risk. It is the situation the industry is navigating right now.

The same vulnerability existed before 26 February 2026. It existed when a particular product category had limited or no BBA-certified options. It existed when a project’s ground conditions required site-specific engineering that no generic certificate could address. The BBA suspension has simply made it visible to a wider audience.

In those circumstances, Building Control bodies that have treated BBA certification as the only acceptable pathway have not been applying a more robust standard. They have been applying a narrower one, and in doing so, they have been excluding engineered systems that in many cases offer a more project-specific, verifiable, and technically defensible basis for acceptance than a certificate alone ever could.

What Genuine Engineering Assurance Looks Like

Let me be direct about what RADIX considers adequate technical assurance for a screw pile installation, not because it is our approach, but because it reflects established UK geotechnical and structural engineering practice applied consistently to foundation systems of this type.

Structural design must be carried out to Eurocode standards, with appropriate analysis of the load cases relevant to the specific project: compression, tension, lateral, and torsional loads. That design must be underpinned by independent testing – mechanical, metallurgical, and coating performance – conducted by UKAS-accredited laboratories.

Installation must be controlled through defined procedures, with trained and certified operatives and calibrated equipment. And critically, installed performance must be verified on site through static load testing and torque monitoring, with correlation between installation torque and load-bearing capacity established and documented for each project.

These are not supplementary requirements. They are the components of a technically robust compliance pathway that accounts for the one thing a certificate can never provide: evidence of actual performance in the ground conditions of this specific project.

This approach aligns with the ICE Specification for Piling, ISO load testing standards, and Eurocode design principles. It is the same framework applied to driven piles, CFA piles, and other geotechnical systems. There is no technical basis for treating screw pile systems differently.

What We Are Asking of Building Control

We are not asking Building Control bodies to abandon quality standards. We are asking them to apply the same engineering judgement to screw pile systems that they apply to every other foundation type, and to recognise that project-specific engineered validation is not a lesser alternative to certification; in many respects, it is a more rigorous one.

In practical terms, this means defining clear technical acceptance criteria for screw pile systems that do not rest on certification as a prerequisite. It means evaluating engineered systems against those criteria on a project-by-project basis. And it means acknowledging that where a system can demonstrate Eurocode-compliant design, independent laboratory testing, and site-verified installed performance, that demonstration constitutes a robust basis for approval.

The BBA’s accreditation situation has created an immediate and practical incentive to examine these questions. But they were the right questions to be asking before February 2026, and they will remain the right questions to be asking once accreditation is restored.

The Broader Context

Ground screw and screw pile systems are a key enabler of Modern Methods of Construction, off-site fabrication, and rapid deployment. They eliminate or significantly reduce concrete usage, lower embodied carbon, and support the reversible construction models that sustainability-focused developers are increasingly requiring.

Restricting their use through certification gatekeeping, in a period when the primary certification body is itself operating outside its normal accreditation framework does not serve safety. It does not serve quality. It serves neither contractors nor clients. It simply maintains an administrative status quo that has never been grounded in sound technical reasoning.

The industry needs consistent, technically robust assessment criteria for these systems. The current situation provides an opportunity to build them.

Note: The BBA’s UKAS accreditation suspension was announced on 26 February 2026 and was current at the time of publication. Readers are advised to check the current accreditation status of the BBA at bbacerts.co.uk and to seek direct clarification from the BBA regarding any certificates or scheduled reviews relevant to their projects.

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