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A symmetrical fire-rated cavity barrier designed to provide compartmentation of larger concealed spaces (extensive cavities) within a building. By offering 30 minutes' integrity and 30 minutes' insulation (to BS 476-20 and BS 476-22), VALBARR® 30:30 exceeds the minimum requirements relating to cavity barriers as detailed in the Building Regulations (E&W) Approved Document B. It is manufactured using specially woven/ treated glass fibre fabrics and a patented laminated insulation layer. The barrier contains no respirable fibres, is lightweight, easy to fit and requires no specialist tools or fittings.

Features and benefits:

  • Non-toxic.
  • User-friendly.
  • Flexible.
  • Durable.
  • Easy to manipulate and cut to shape.


- Warrington Exova:

  • Horizontal Assessment No. 363523.
  • Movement Joints Assessment No. 363521.
  • Pipe Protection Assessment No. 363520.
  • Timber Protection Assessment No. 363519.
  • BS 476 part 6:1989 Class 0 (Fire Propagation).
  • BS 476 part 7:1987 Class 1 (Surface Spread of Flame).
  • ISO 1182 1990 (E): Non Combustibility.
  • IMO Resolution MSC.61 (67) Part 1. Non Combustibility.

Standard product features

Roll size (w x l):

1.3 x 6 m.

Thickness (minimum):

7 mm.

Fire rating (to BS 476-20 and BS 476-22):

30 minutes' integrity and 30 minutes' insulation.

Weight (minimum):

1900 g/m².




VALBARR® proprietary food safe non-corrosive chemical treatment with added benefit in helping prevent fibre migration.



Fibre diameter:

>6 micron (non-respirable).

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-70/445 Coated woven glass fibre cloth flexible cavity barriers

Product specification

An important note about specifying





+44 (0)161 3085510

Product reference

VALBARR® 30:30



Manufacturer details

Westbury ,
Dorset, DT9 3RB
Tel +44 (0)161 3085510
NBS Plus
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