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Rockwool TCB Cavity Barrier

Rockwool TCB Cavity Barrier

Rockwool TCB Cavity Barrier is a polyethylene sleeved Rockwool strip engineered to provide fire safety for timber frames, metal frames and traditional masonry cavities. Standard TCB Cavity Barrier comprises a strip of Rockwool inserted into a translucent red polyethylene sleeve incorporating two flanges designed for fixing.

Rockwool TCB has been fire tested to 1 hour integrity and 30 minutes insulation and is used to provide a half hour cavity barrier as defined in table A1 of appendix A to Approved Document B of the Building Regulations 1991 (2000 Edition.)


  • Reduced installation time
  • Meets Building Regulations requirements
  • Simple to install and fix
  • Water repellent
  • Maintenance free
  • Backed by Fire Test information


Fixing of the TCB Cavity Barrier to the inner leaf is carried out only at the flanges using non-corrosive staples or clout nails. These fixings should be located at maximum 150mm centres in both horizontal and vertical applications. Joints between TCB’s must be closely butted. At door and window jambs, the horizontal barrier should overlap the vertical barrier to ensure a close butted joint is maintained between both barriers.

Used in

  • Fire solutions
  • Intermediate Flooring
  • Internal and separating walls
  • Separating Floors

Order Information

  • This product is not available for delivery in mainland UK
  • Rockwool Cavity Barrier 65 x 65 x 1200 (54m per Bag)
Order Rockwool Cavity Barrier - Minimum Order Qty: 1
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