Rockwool TCB Cavity Barrier

All Rockwool Building products
  • Rockwool building accessories
  • Rockwool Cavity Barrier
  • Rockwool Firepro
  • Rockwool Roll
  • Rockwool slab insulation
  • Rockwool Granulates
  • Rockwool Party Wall Cavity Barrier
  • Rockwool Thermal Cavity Barrier
  • Rockwool Beamclad System
  • Rockwool Fire Barrier System
  • Rockwool SP FireStop System
  • Rockwool Roll
  • Rockwool Batt
  • Rockwool Flexi
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  • Rockwool RW
  • Rockwool RWA
  • Rockwool Soffit
  • Rockwool Steel Frame
Downloads

SDS

SDS-rockwool-insulation.pdf

Installation manual

tcb--pwcb-cavity-barriers-installation-guide_uk.pdf

Certificates

certifire-cf5861-rockwool-tcb-march-2025.pdf

PDS

PDS_tcb-cavity-barriers---nbs-specification.pdf

TDS

TDS_tcb--pwcb-datasheet.pdf
Manufacturer
Rockwool Building

Rockwool TCB Cavity Barriers improve a building’s safety by preventing the spread of fire within concealed voids. Byinstalling the TCB Cavity Barrier, it provides essential protection whilst also helping to minimise air leakage and heat loss between the external cavity and the separating party wall. 
Rockwool TCB Cavity Barriers are manufactured from non-combustible stone wool, encapsulated within a resilient polythene sleeve which eliminates the need for weather protection during installation.

  • Passive fire protection

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  • High temperature insulation

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  • Thermal insulation

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  • Acoustic insulation

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  • Accessories

Sector
Construction
Properties
Building Insulation
Board / sheets
Stone Wool
Product code Product description Insulation Thickness Finishing Width Length (mm)
View variation FPRWTCB09009020 RW TCB CAVITY BARRIER 90x90 (20) 90 mm 90 mm 1200 mm
View variation FPRWTCB11011014 RW TCB CAVITY BARRIER 110x110 (14) 110 mm 110 mm 1200 mm
View variation FPRWTCB120120 RW TCB CAVITY BARRIER 120x120 (15) 120 mm 120 mm 1200 mm
View variation FPRWTCB130130 RW TCB CAVITY BARRIER 130x130 (12) 130 mm 130 mm 1200 mm
View variation FPRWTCB140140N RW TCB CAVITY BARRIER 140x140 (10) 140 mm 140 mm 1200 mm
View variation FPRWTCB15015009 RW TCB CAVITY BARRIER 150x150 (9) 150 mm 150 mm 1200 mm
View variation FPRWTCB160160 RW TCB CAVITY BARRIER 160x160 (7) 160 mm 160 mm 1200 mm
View variation FPRWTCB160160N RW TCB CAVITY BARRIER 160x160 (8) 160 mm 160 mm 1200 mm
View variation FPRWTCB180150 RW TCB CAVITY BARRIER 180x150 (6) 180 mm 150 mm 1200 mm
View variation FPRWTCB6565 RW TCB CAVITY BARRIER 65x65 (45) 65 mm 65 mm 1200 mm
View variation FPRWTCB656531 RW TCB CAVITY BARRIER 65x65 (31) 65 mm 65 mm 1200 mm
Extra information
  • Easy to install
  • Fire resistance up to 60 minutes (EI)
  • Reduce acoustic flanking transmission
  • Improves air leakage & heat loss
  • Unaffected by building movement
  • Suitable for vertical and horizontal applications
  • Site durable & weather protected
Installation guidelines

Rockwool TCB Cavity Barriers can be used in both vertical and horizontal applications, providing an effective fire, acoustic and thermal barrier within external wall cavities and separating party walls.
All Rockwool Cavity barriers are 1200mm long and are designed to be compression fitted within the cavity (min 10mm-15mm compression). The barriers do not rely on the polythene flanges to hold them in place in the event of a fire. It is essential that the correct cavity barrier size is specified to suit the as-built cavity width. TCB Cavity Barriers are available in a range of thicknesses to suit cavity widths.