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Cavity Stop Sock (Fire Barrier)

Item No.

Pack Size 20

ARC Cavity Stop Socks

  • Up to 4 hours fire integrity
  • Horizontal and vertical options
  • Specified in terraced, semi-detached, apartments and major projects
  • Meets requirements of Robust Detail Part E and Approved Document B
  • Maximum cavity width available: 300mm
  • Easily installed with compression fit; no mechanical fix is required
  • Third-party certificated by Certifire


ARC Cavity Stop Sock restricts the spread of smoke and flames within the cavity of external masonry walls. It is ideally suited for providing a cavity barrier within the external wall cavity, in line with a separating wall or floor as specified in Approved Document B, and for closing the cavity at eaves level.

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