TCB Cavity Barrier

Product As part of the comprehensive FirePro range of fire protection products, standard TCB Cavity Barrier comprises a strip of Rockwool inserted into a translucent red polyethylene sleeve incorporating two flanges designed for fixing. The sleeve eliminates the need for weather protection during installation and is overprinted with fixing instructions for ease of use. (Non-standard sizes have a single flange only.) Rockwool TCB is used to provide a ½ hour cavity barrier as defined in table A1 of appendix A to Approved Document B of the Building Regulations 1991 (2000 Edition.)

A polyethylene-sleeved Rockwool strip providing fire safety for cavities

Advantages

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

Nominal dimensions

Standard TCBs are supplied to suit cavity widths between 50 and 110mm, and are normally available from stock. The TCBs are manufactured in lengths of 1200mm. TCBs can also be supplied to suit cavity widths greater than 110mm up to a maximum width of 140mm. (These are referred to as non-standard TCBs, encapsulated in a translucent red polyethylene sleeve, with a single fixing flange). Please quote cavity size when ordering.

Design considerations

In timber framed dwellings, cavity barriers and firestops are requiredto prevent the spread of fire through walls, floors and cavities.To meet the minimum Standards and Regulations, two-storeydwellings and above require cavities to be closed by cavity barriers atspecified intervals to meet the specific building purpose group.

The combined use of TCB and Rockwool Fire Barrier (Timber Frame) willmeet the requirements of the Building Regulation for compartmentwalls between dwellings. See Flexi product data sheet.

Size selection

The use of the correct size of TCB Cavity Barrier is essential. In the eventof fire breaking into the cavity, TCB Cavity Barrier does not rely on theplastic flanges to hold it in place, but on its compression between theinner leaf and external brickwork or blockwork. TCB Cavity Barrier isdesigned to compress to a tight fit in cavities. It is essential to specifythe TCB by reference to the actual cavity width constructed.