NBS Source
List your products

Smoke and fire cavity barriers

Uniclass category Pr_25_80_80

Sort by:

Showing 1-11 of 11

551-552 Cavity Barriers

551-552 Cavity Barriers


Manufactured using polythene enclosed non combustible rockfibre in bespoke sizes designed to be compressed by 15 mm within the cavity - this 'made to measure' cavity barrier design provides a minimum of 1 hour fire resistance and is crucial in sound applications where 'flanking transmission' can be the weak link of an otherwise robust construction. Meets the requirements of:

  • 2000 Building Regulations (E&W) Approved Document B (Fire Safety).
  • 2003 Building Regulations (E&W) Approved Document E (Sound Resistance).
  • Robust Details Part E.
  • NHBC Standards 2005.

Tested by Warrington Fire Research to provide one hour fire resistance – double the minimum requirement. Meets Parts B and E (including Robust Details) of the Building Regulations (E&W) 2000. Mayplas Deluxe and Party Wall Ranges have been assessed to provide two hours fire resistance.

ROCKWOOL® TCB Cavity Barrier

ROCKWOOL® TCB Cavity Barrier


Preventing fire spreading through concealed voids is essential for improving safety and property protection. One of the best ways to achieve this is to correctly specify and install cavity barriers.

ROCKWOOL Cavity Barriers have been specifically developed to exceed minimum building regulation requirements for fire resistance in concealed wall cavities. They have been tested and assessed for up to 60 minutes fire resistance (Integrity and insulation).

Rockwool insulation products do not contain blowing agents with an ozone depletion potential (ODP) or global warming potential (GWP), are CFC-HCFC-HFC free and 97% recyclable. Compatible with most materials with which it is likely to come into contact in normal building and industrial applications. Will not react with metal components or cause loss of plasticiser from PVC cables and pipes.


  • Easy to install.
  • Durable products withstand on-site handling.
  • Once installed, performance is not affected by movement in the building, shrinkage or thermal change.
  • Can be used vertically or horizontally.
  • Non-combustible.

Showing 1-11 of 11