A cavity barrier is a fire-resistant component installed within concealed spaces in buildings – such as wall cavities, floor voids, and roof spaces – to prevent the spread of fire and smoke. These voids, often created for ventilation or insulation, can act like chimneys during a fire, allowing flames and smoke to spread rapidly. Cavity barriers block these hidden routes, helping to maintain fire compartmentation and slow fire progression.
They are typically made from stone wool and intumescent materials that expand when exposed to heat, sealing gaps and joints. Cavity barriers are essential for meeting building regulations and ensuring occupant safety. Without them, fire can bypass fire-resistant walls and floors, compromising the building’s integrity. Tenmat’s cavity barriers are rigorously tested and designed to perform reliably in real-world fire scenarios.