ARC Cavity Stop Sock – 200mm Cavity

The 200mm ARC cavity stop sock is a passive fire protection product designed to restrict the spread of fire and smoke within cavity wall constructions, in accordance with the functional requirements of Approved Document B. It is intended to support fire compartmentation by limiting concealed fire spread within external and separating walls.

This ARC cavity fire sock is suitable for installation within 200mm cavities in masonry and timber frame wall systems. When correctly installed, the sock compresses within the cavity to form a continuous cavity barrier, helping to restrict airflow and reduce the potential for fire and smoke spread through concealed voids, as required under cavity barrier provisions.

The product may be used in external cavity walls, party walls, and internal compartment walls where cavity barriers are required to subdivide cavities or prevent fire spread beyond the compartment of origin. ARC fire socks are commonly specified as part of a compliant passive fire protection strategy in residential and commercial buildings.

Each unit is supplied in a 1200mm length and sold individually, allowing accurate quantity specification. Quantity discounts are available for full pack purchases, supporting efficient installation on larger projects.

Correct selection and installation are essential to ensure effective compression and fire performance. The 200mm ARC cavity stop sock provides a reliable solution for cavity wall fire stopping in line with Approved Document B requirements.

Building Control Notes

Intended for use as a cavity barrier within cavity wall constructions
Supports the functional requirements of Approved Document B
Suitable for masonry and timber frame walls with 200mm cavities
To be installed in accordance with manufacturer instructions
Correct sizing and placement are critical to performance

Cavity Closers & Cavity Wall Insulation

ARC Cavity Stop Sock 150mm

ARC Cavity Stop Sock 200mm

ARC Cavity Stop Sock 125mm

ARC Cavity Stop Sock 100mm