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Size: 50mm Cavity - Yellow - 75 x 150 x 1200mm (pack 24)
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£69.60
£83.52 inc VAT

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ARC TCB (Timber Cavity Barrier) restricts the spread of smoke and flames within timber frame cavity walls, as well as minimising the effect of flanking noise pollution at wall junctions.

This is the Timber to Timber barrier.

  • Timber fire rating - Up to 1 hour
  • Cavity widths - 50 - 150mm
  • Horizontal and vertical options
  • Specified in semi-detached, apartments and major projects
  • Complies to Robust Detail Part E and Building Regulations
  • Supplied with flanges for fixing back to timber frame
  • Can be manufactured to suit cavity widths up to 150mm
  • Options for timber to brickwork and timber to timber applications
  • Easy to install

They are manufactured from low resin, non-combustible rockfibre mineral wool insulation and are sleeved in polythene for on-site protection.

 Technical

Length supplied 1.2m
Third-party certification Certifire CF5403
Insulation Non-combustible rockfibre mineral wool
Thermal conductivity 0.037W/mK
Fire rating Up to 60 minutes
Insulation performance 15 minutes
Test standard BS 476 Part 20
Construction type Timber frame
Orientation Vertical or horizontal
Robust Detail compliance E-WT 1-4, E-FT 1-6

    Please click on the links below:

    ARC TCB Datasheet


    ARC TCB is designed to be compression fitted within a timber frame cavity. In vertical applications, both flanges are fixed, in horizontal applications only the top flange should be fixed. 

    The flanges are fixed to the frame using clout nails at 150mm centres. The polythene encapsulation offers on-site weather protection, but can be cut away without affecting the barrier’s performance.

    Care should be taken butt joints are tighly fitted with no gaps remaining. The barrier must fully fill the cavity from brick to timber, with any cavity insulation cut back.
    At door and window openings it is recommended the horizontal barrier should overlap the vertical barrier to ensure a close butted fit can be achieved.


    ARC’s wealth of technical experience ensures that the best solution can be identified from their comprehensive range of products. All fire barriers and cavity closers are manufactured to NHBC requirements and hold LABC accreditation. Operating within an ISO 9001 Quality Management System and ISO 14001 Environmental Management System, all products are manufactured to the highest standards.


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