Off-site modular construction is booming but brings unique fire safety considerations. We examine the risks and solutions.. The Modular Revolution Modern Methods of Construction (MMC) are transforming UK housebuilding. But prefabricated modules present distinct fire safety challenges. Key Challenges 1. Cavity barriers — ensuring continuity at module interfaces 2. Service penetrations — maintaining fire stopping between modules 3. Structural fire performance — light steel vs timber frame behaviour 4. Site storage fires — protecting completed modules before installation 5. Insurance — limited fire test data for novel systems Best Practice Factory fire testing of complete module assemblies Third party inspection at manufacture and installation Detailed fire strategy specific to the modular system used Fire rated module to module connections designed and tested Construction phase fire safety plan For modular construction fire engineering, contact us.