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United Kingdom Testing & Certification, a SOCOTEC company, celebrated the official opening of their new fire resistance laboratory on the 9th of July. The day was marked with a ceremony that seen over 100 colleagues and guests from across the industry attend to witness a live fire test and a keynote speech delivered by Dame Judith Hackitt. The new combination furnace, one of the only commercially available in the UK, was unveiled with a curtain drop to start the day off with Ellen Johnson, UKTC’s Compliance Officer and longest standing employee given the privilege of pressing the big red button to drop the curtain and launch the confetti. Ellen shared, “It’s an honour to be asked to take part in today’s event alongside individuals that are at the forefront of the industry. Although I was the person that pressed the button, I was representing every one of my past and current colleagues that have contributed to the growth of UKTC over the last 6 years.” Following the grand reveal, guests took to their seats situated in the new laboratory and listened intently as Andrew Hutchison, UKTC Operations Director, introduced Dame Judith Hackitt. Dame Judith’s presentation covered the progress made so far in the construction and testing industry in the wake of regulatory reform as well as the need for culture change, competence levels and the journey the industry is on to make the built environment safer for everyone. On why test laboratories matter now more than ever, Dame Judith commented, “This is why facilities like this are going to be so much in demand because everything is being looked at again in terms of the efficacy and the reliability of the way that we test and assure products in this sector." Lunch came street food style, with Pizza and Taco food trucks fuelling the networking hour. There were prizes up for grabs too, from discounted fire tests to Tunnock’s Teacakes. Guests made the most of the Scottish sunshine, swapping notes with construction industry peers before heading back into the laboratory to watch a 5m fire resistance test led by UKTC’s Head of Testing, Daniel Fitzsimmons. The day wrapped up with an expert panel Q&A where the audience had the opportunity to have their burning questions answered by the panel. Dame Judith Hackitt, Stephen Garvin, Head of Building Standards at the Scottish Government, Dr. Andrew Taylor of the ASFP, and Beth Dean of Maze Consulting made up the panel of experts. Topics including CE marking, BS EN 13501 classifications and further regulatory reform made for great debate and insight from the panel. Andrew Hutchison, UKTC Operations Director, said, “It’s been great to share this milestone moment for the UK’s fire safety industry with so many dedicated professionals. This investment will directly contribute to a safer built environment by significantly increasing the testing capacity within the UK for manufacturers.” Matthew Marriott, CEO of SOCOTEC UK & Ireland, added: “This investment represents our commitment to providing the most advanced fire testing capabilities available, we can now provide a massively expanded service to key clients across the construction, infrastructure and manufacturing sectors – helping them achieve their critical fire safety compliance needs. “With building safety regulations continuing the evolve, it is important to continue our investment into cutting-edge technology that helps us stand out from our competitors. This second firehall is a statement from us, that UKTC and the wider SOCOTEC business will continue to remain at the forefront of development and service offering.”

Minimum test dimensions meet the standard. They don’t always meet the real world. Most fire resistance testing in the UK is conducted in a 3x3m furnace. Perfectly valid, but it can leave a gap between laboratory evidence and the way wall systems, facades, and insulated panel constructions actually behave in a building. Testing at 5 meters starts to close that gap. In an industry where architects and specifiers are building upwards with complex and innovative designs, relying on assessments from old testing may not be deemed acceptable. Testing at a height of 5m allows specifiers and manufacturers to prove concepts work safely whilst achieving the necessary test evidence. What a 5m Test Can Reveal Fire and heat rise. As a result, it creates pressure differentials, drives hot gases into cavities and subjects joints and fixings to cumulative stress far beyond what a 3m test could replicate. At 5m, a fire resistance test can reveal: Flame spread and cavity barrier performance over realistic heights. Bowing, joint opening and fixing failures under sustained thermal attack. Chimney effects within cavities. Panel joint behaviour across multiple courses of construction. Structural movement that only develops at scale. These behaviours are conditions that wall systems and facades face in commercial and industrial buildings every day. It is crucial that manufacturers can prove their systems work, and that can only be done through testing. Stronger Evidence for Extended Field of Application (EXAP) Testing at 5m also supports Extended Field of Application reports. Broader evidence results in less uncertainty when applying test data to configurations and heights beyond those directly tested. In a regulatory environment shaped by increasing scrutiny of fire performance claims, test evidence that more closely reflects real installation conditions is not a bonus. It is increasingly expected. What fire tests can be done at 5m tall? UKTC’s combination furnace allows tests to be carried out at 5m tall to the following standards: BS EN 1364-1:2015 (Non-Loadbearing Walls & Partitions) BS EN 1634-2:2008 (Door, Shutter and Openable Window Assemblies and Hardware) By using UKTC, tests to the above standards will be accompanied with UKAS accredited reports; crucial for proving performance to the marketplace. A Laboratory Built for Manufacturers For manufacturers of wall systems, sandwich panel, cladding, and facades, large-scale test evidence supports: Product differentiation Insurer and client confidence Broader application of results UKTC’s 5m fire resistance test capability is available now. If you’re developing or validating a system that needs to perform at height, or you want to extend your scope, contact our team for a confidential chat.

The revised BS 8214:2026 tightens the rules on smoke leakage measurement for fire and smoke control doors including a critical change that removes a long-standing loophole at the threshold. Let’s take a look at what’s changed. Smoke kills more people in building fires than heat or flame. It is for precisely this reason that smoke leakage performance is not an optional feature of a fire door, it is a life-safety requirement, and one that the updated BS 8214:2026 treats with renewed rigour. Whether you are a specifier, installer, building owner or fire risk assessor, understanding how smoke leakage is tested, classified, and maintained is now more important than ever. This blog unpacks the key requirements of BS 8214:2026 as they relate to smoke leakage testing: what the tests measure, what performance levels are required, and what has materially changed from previous practice. What Smoke Leakage Testing Actually Measures Smoke is not just a visibility problem. It is the transfer of airborne particles from the products through gaps in a fire door assembly; around the perimeter, at the threshold, between meeting stiles on double-leaf doors, and at any aperture in the leaf. Even a well-constructed door with proven and tested fire performance can allow lethal quantities of smoke to pass through if its gaps are not adequately sealed. Both test methods referenced in BS 8214:2026 approach this by measuring air leakage under a controlled pressure differential in a laboratory chamber. The tests are similar in principle and produce comparable results, but they sit within different classification frameworks. The Two Test Routes BS 8214:2026 recognises two valid test standards for demonstrating smoke leakage performance: BS 476-31.1 is the established British Standard method, measuring smoke penetration through doorsets and shutter assemblies under ambient temperature conditions. BS EN 1634-3 is the equivalent European test standard for smoke control performance of door and shutter assemblies, used when seeking a European classification. The test evidence, no matter what test is completed, must form part of the supporting documentation for the fire door and be referenced in the manufacturer's specification. Performance cannot be assumed, inferred, or carried over from a different assembly without appropriate assessment or extended field of application (EXAP). The Required Performance Level for Smoke Testing The standards are precise about the leakage rate a smoke control door must achieve. BRITISH STANDARD ROUTE ≤ 3 m³/h/m at 25 Pa, tested to BS 476-31.1, measured across the whole door assembly. EUROPEAN STANDARD ROUTE Sa4 Class classified to BS EN 13501-2, tested to BS EN 1634-3, with threshold sealing included. Both thresholds are equivalent in stringency. The 3 m³/h per metre figure represents the maximum acceptable air leakage per metre run of the gap between the door leaf and the frame. This is measured at a pressure of 25 Pascals across the whole assembly, including the threshold. The Major Change: Threshold Sealing Is Now Mandatory This is arguably the most significant practical change introduced by the 2026 edition, and one that will affect many existing and future installations. In previous practice, it was considered acceptable to measure smoke leakage performance at the head and jambs of a door only, leaving the threshold gap unsealed during testing. That approach is now explicitly rejected by BS 8214:2026. KEY CHANGE IN THE 2026 EDITION The smoke leakage performance of a door must now be measured across the whole specimen including the threshold and, where applicable, the meeting stiles. The former practice of measuring head and jambs only is no longer deemed acceptable. In practical terms, this means that any door intended for smoke control duty must incorporate an effective bottom-of-door sealing system. The standard's preferred solution is a drop seal, a mechanism that is automatically forced downward by spring pressure when the door is in the closed position, creating a continuous seal at the threshold without impeding the opening and closing action. The standard is careful to note that drop seals introduce their own design considerations. They should not be used in isolation from the wider smoke control strategy. Pressurisation systems, for instance, can prevent doors from closing fully, while sloping or uneven floors may compromise seal effectiveness. These factors must be identified and addressed during specification, not left to the installer to resolve on site. The System Is Greater Than the Sum of Its Parts Perhaps the most important principle running through BS 8214:2026 is that smoke leakage performance cannot be attributed to any single element of a fire door assembly. It belongs to the entire system: the seals, the frame, the threshold detail, any glazing, the hardware, the quality of the frame-to-wall seal, and the competence of the installation. This means that everyone in the supply and installation chain, from the manufacturer who establishes the tested specification, to the installer who achieves the required gaps and seal continuity on site, to the building owner who ensures the door is not subsequently modified, carries a share of responsibility for maintaining that performance throughout the door's working life. The 2026 guidance update to close the threshold loophole is not a bureaucratic refinement. It reflects a recognition that real smoke does not stop at a convenient height above the floor. A door that performs at its head and jambs but leaks freely at the base provides a false sense of security, and in a fire, false security costs lives. Smoke Leakage Testing United Kingdom Testing & Certification provide UKAS accredited Smoke Leakage Testing to both BS EN 1634-3 and BS 476-31.1. Manufacturers can test for both smoke leakage and fire with one specimen at a single location. If you would like to learn more about smoke leakage testing, including how much a smoke leakage test costs, click here.

Meet the United Kingdom Testing & Certification team behind the industry-leading fire resistance and reaction to fire test experiences. Our Team Meet the individuals dedicated to ensuring life safety through compliance and service. Abby Gray Technical Officer Read Bio Alice Brown Business Development Associate Read Bio Andrew McGhee Marketing Manager Read Bio Charlie Dobson Technical Surveyor Read Bio Eddie Wilson Technical Surveyor Read Bio Jago Steven Sales Executive Read Bio Matthew Dale Reaction to Fire Manager Read Bio Rob Grant Technical Officer Read Bio Adam Campbell Technical Officer Read Bio Andrew Hutchison Operations Director Read Bio Barry Steven Laboratory Manager Read Bio Dan Fitzsimmons Head of Testing Read Bio Ellen Johnson Compliance Officer Read Bio Mark Garfield National Sales Director Read Bio Murray Ker Business Development Read Bio Tom Smith Technical Services Officer Read Bio Aditi Bapte Associate Technical Services Officer Read Bio Andrew Jeffrey Brand & Marketing Officer Read Bio Cameron Leckie Technical Surveyor Read Bio David Brown Business Unit Director Read Bio Ian Laithwaite Certification Manager Read Bio Mark Shaw Reaction to Fire Technical Officer Read Bio Nathan Small Senior Development & Implementation Lead Read Bio Join our team If you're interested in a career at United Kingdom Testing & Certification, click below to learn more. UKTC Careers

Learn more about the team behind delivering fire resistance and reaction to fire testing for passive fire protection product manufacturers. Our Team Abby Gray Technical Officer Abby joined UKTC in November 2023 following completion of an HNC in Computer Aided Design. Now in her role as a Technical Surveyor, Abby uses her expertise to conduct fire resistance test specimen surveys and create the associated technical drawings. Meet the team Learn more about the team dedicated to delivering leading fire testing and certification services. Our Team

Learn more about the team behind delivering fire resistance and reaction to fire testing for passive fire protection product manufacturers. Our Team Ellen Johnson Compliance Officer Ellen is a quality assurance and compliance professional with over 20 years’ experience in the private sector implementing various quality standards. Ellen joined UKTC from its inception in 2020 and has successfully delivered the business systems required to achieve the key laboratory testing standard ISO/IEC17025 and the product certification standard ISO/IEC17065. Meet the team Learn more about the team dedicated to delivering leading fire testing and certification services. Our Team