What's New

The British fire door testing standard that has underpinned the UK construction industry for decades is being progressively replaced in regulatory practice by a European regime that demands far more stringent proof that every component of a fire door — including every lock, hinge, closer and handle — actually works together under fire conditions.

The transition away from BS 476-22 and towards the European standard EN 1634-1 represents one of the most consequential shifts in the UK fire door hardware sector since the Building Safety Act was passed in 2022. It marks the culmination of reforms set in motion by the Grenfell Tower Inquiry, which raised broader concerns about the adequacy of the UK's historic fire testing and certification framework. The government has accepted all 58 recommendations from the Phase 2 inquiry report, and the Building Safety Regulator — whose role and powers are expected to be strengthened as part of the post-Grenfell reforms — is now charged with enforcing the new framework. Certain offences under the Building Safety Act may carry unlimited fines and custodial sentences of up to two years.

Under BS 476-22, fire door testing had long permitted a degree of flexibility that manufacturers and specifiers grew comfortable with: components could be tested in relative isolation and assessments could, in some cases, rely on expert opinion rather than empirical data. EN 1634-1 substantially reduces that flexibility. The European standard requires the entire doorset — the leaf, the frame, the intumescent seals, the glazing, and critically, every item of hardware — to be tested together as a complete assembly. An FD30 or FD60 rating earned under the old British test may not necessarily translate directly under the European one, because EN 1634-1 uses shielded thermocouples that are less responsive to heat and adopts different pressure conditions within the furnace, creating a more demanding test environment. It also positions the neutral pressure plane lower in the door, increasing the positive pressure at the top of the assembly and making it harder to contain hot gases and flames on the unexposed side.

Existing installations tested to BS 476-22 will not automatically become non-compliant overnight: the government has established transitional arrangements, and EN-based classifications are expected to become the primary route for demonstrating compliance in future revisions to Approved Document B for new and replacement work. But for hardware manufacturers, the practical urgency is already here. Any company that wants its products specified in new-build higher-risk buildings — or in the retrofit programmes now sweeping through the social housing sector — must demonstrate EN 1634-1 compliance well before any eventual cut-off.

The hardware problem: why a lock can no longer be just a lock

For the door hardware industry — the makers of locks, latches, hinges, door closers, panic exit devices, and the dozens of smaller ironmongery items that turn a slab of timber or steel into a functioning fire door — the implications of EN 1634-1 are profound and, in some corners, alarming.

Under the old BS 476-22 regime, a lock or a closer could be fire-tested and certified largely as a standalone item. Under EN 1634-1, that is no longer enough. The standard demands that the lock, the hinge, the closer, and every other hardware component be tested as part of the specific doorset assembly in which it will be installed. If a fabricator changes the hinge supplier, or a specifier swaps one intumescent lock jacket for another without re-testing, or if a maintenance contractor replaces a closer with a model that looks identical but was not part of the original fire test, the original fire test evidence may no longer remain valid.

Daniel May of Consort Architectural Hardware, writing in April 2026, warned that the wholesale move to EN 1634-1 could create a significant product re-testing bottleneck, with UK testing bodies struggling to handle the volume of new certification work. He noted particular difficulties for heritage buildings with bespoke door assemblies — where every door may be dimensionally unique — and for composite doors, where extended application pathways remain relatively limited compared with some other product categories.

The cost implications for manufacturers are substantial. A single EN 1634-1 fire resistance test can run to several thousand pounds, and because the standard frequently requires testing from both orientations of the door, the total cost per doorset configuration is materially higher than under BS 476-22. For a mid-sized hardware manufacturer with a catalogue of several hundred lockset variants, the full re-certification exercise could run into the hundreds of thousands of pounds. Industry bodies, including the Door and Hardware Federation, have been lobbying the government for support — but as of July 2026, no dedicated transition fund has been announced.

A handful of manufacturers have moved early. Codelocks announced that it had achieved CE marking for its mortice locks and tubular latches under EN 1634-1, with 30- and 60-minute fire ratings confirmed through testing at UL Solutions. Winkhaus has partnered with fabricators to offer EN 1634-compliant multi-point locks with integrated electronic access control. These early movers are expected to gain a significant competitive advantage as specifiers begin to filter tender lists by EN 1634-1 compliance status.

The Golden Thread and the new inspection regime

The hardware testing overhaul does not exist in isolation. It sits inside a wider enforcement architecture that makes the post-Grenfell period one of the most heavily regulated eras in the history of UK fire door safety.

The Building Safety Regulator, operating within the Health and Safety Executive framework, has entered its first full phase of active implementation. For multi-occupied residential buildings over 11 metres in height, the Responsible Person — typically the building owner, freeholder or managing agent — is now legally required to carry out quarterly inspections of all communal fire doors and annual "best endeavours" checks on every flat entrance door. For commercial buildings, BS 9999 recommends professional inspections every six months. Non-compliance may carry significant regulatory consequences, including substantial fines and, in certain circumstances, criminal sanctions.

Crucially, the BSR is not simply checking whether inspections are happening. It is increasingly emphasising the need for a fully searchable and version-controlled digital "Golden Thread" of evidence linking every fire door, every hardware component, and every maintenance decision back to its original fire test certification. Responsible Persons in higher-risk buildings are increasingly expected to be able to provide supporting documentation when requested by regulators. Industry surveys and early compliance exercises have highlighted continuing gaps in the availability of complete digital evidence records. The regulator has also indicated that mismatches between design records and physical installations may trigger enforcement action — and that missing evidence relating to a door component could represent a significant compliance concern.

The Golden Thread requirement effectively means that the burden of EN 1634-1 compliance cascades beyond manufacturers and specifiers to the entire supply chain. A facilities manager replacing a worn-out fire door hinge in 2028 must be able to demonstrate that the replacement hinge is compatible with the relevant tested doorset assembly. If that evidence does not exist — because the hardware manufacturer has not yet completed its re-certification programme — the building owner may face difficulties in demonstrating compliance.

Updated guidance and codes of practice increasingly reinforce this connection by emphasising traceability and the maintenance of evidence linking products back to tested configurations. Every maintenance decision must link back to evidence; every product must link back to its tested performance.

What comes next: four years to close the gap

The transition period may sound distant, but the sheer volume of re-testing required — across tens of thousands of hardware configurations, door types, and installation scenarios — means that the effective window for manufacturers to begin their EN 1634-1 transition programmes is now, not later.

Industry observers expect a bifurcation in the hardware market. Manufacturers that invest early in full EN 1634-1 certification will consolidate their position in the specification chain, particularly for higher-risk buildings and public-sector contracts where compliance is non-negotiable. Those that delay risk being crowded out of parts of the specification market and becoming increasingly reliant on legacy replacement demand.

There is also a broader geopolitical dimension. Post-Brexit Britain's adoption of a European testing standard is pragmatic rather than political: EN 1634-1 is widely regarded within the industry as a more demanding testing methodology than BS 476-22, and the Grenfell legacy has made scientific defensibility the overriding priority in fire safety regulation. The UK's post-Brexit construction products framework remains closely aligned with many European technical standards, although conformity assessment requirements differ between the UK and EU markets. Hardware manufacturers that achieve EN 1634-1 certification may therefore be better positioned to access both markets, subject to the relevant CE and UKCA requirements, while those that continue to rely solely on legacy British testing routes may face a progressively narrower specification base.

For architects, specifiers, and building owners, the message from regulators and industry bodies is increasingly clear: fire doors are not assemblies of individually certified parts — they are complete systems that stand or fall together. The hardware industry, after years of incremental change, is being asked to prove that proposition with data. The clock has already started ticking.