Curtain walling and cladding

6.9.14Cavity barriers and firestops

Materials used for cavity barriers and firestops shall be capable of producing adequate resistance to fire and smoke.

Materials are acceptable where they are:

  • specified in building regulations
  • assessed in accordance with Technical Requirement R3.

Systems incorporating proprietary intumescent materials should follow the guidance provided by:

  • the Intumescent Fire Seals Association (IFSA)
  • the Association for Specialist Fire Protection (ASFP).