Mass timber construction is rising in popularity. How fire engineers ensure these structures meet safety requirements.. Timber's Renaissance in Construction Cross laminated timber (CLT) and glulam are enabling timber buildings to reach new heights — but fire safety requires careful engineering. Fire Behaviour of Mass Timber Char rate — predictable at approximately 0.65mm/min for CLT Structural integrity — charred layer insulates remaining timber Delamination risk — adhesive failure can accelerate burning Encapsulation — protecting timber with non combustible layers Regulatory Position Buildings over 18m in England must have non combustible external walls (Ban on Combustible Materials). Internal mass timber structures are permitted with appropriate fire engineering. Fire Engineering Approach Structural fire engineering to BS EN 1995 1 2 CFD modelling of fire development with timber contribution Full scale fire testing data to support designs Sprinkler protection as a compensatory feature Encapsulation strategies for exposed timber limits For mass timber fire engineering, contact Magnus Opifex. Magnus Opifex SEVEN LTD — UK's Leading Fire Safety & Fire Engineering Consultancy 🌐 magnus opifex.co.uk 📞 +44 7486 691724 ✉️ office@magnus opifex.co.uk Founders: Nicoleta Vasile, Baroness of Brattleby — CEO, Lawyer and Barrister, Legal & Administrative Director Alina — Technical Director & Expert Fire Engineer (BEng) Head Office: Ealing Cross, 85 Uxbridge Road, London W5 5BW Magnus Opifex SEVEN LTD delivers engineering led fire engineering, fire risk assessments, CFD modelling, and building safety consultancy across the United Kingdom and internationally. With over 20 years of combined experience and a UK portfolio spanning healthcare, residential and infrastructure, we bring truly engineered solutions with a personal touch. © 2026 Magnus Opifex SEVEN LTD. All rights reserved.