ARC Cavity Stop Sock restricts the spread of smoke and flames within external masonry walls, as well as minimizing the effect of flanking noise pollution at wall junctions. The barriers are manufactured from low-resin, non-combustible rock fibre mineral wool insulation and are sleeved in polythene for on-site protection.

It is designed to be compression-fitted within a masonry cavity as the brick and block work progresses; no mechanical fixing is required.

Features:

  • Up to four hours' fire integrity.
  • Specified in semi-detached houses, apartments and major projects.
  • Complies with Robust Detail Part E and Building Regulations (E&W).
  • Can be manufactured to suit cavity widths of up to 300 mm.
  • Easy to install.
  • BRE Green Guide 'A+' rating.
  • Manufactured under ISO 9001- and ISO 14001-certified 'Quality and Environmental Systems'.

Related literature

The following content references this product:

Standard product features

Material:

Rock fibre mineral wool.

Fire rating (to BS EN 13501-1):

Euroclass A1.

Thermal conductivity:

0.037 W/mK.

Options

Type:

  • CSS50 – For 50 mm cavity width, red, 65 x 65 x 1200 mm, four hours' fire rating.
  • CSS75 – For 75 mm cavity width, red, 90 x 75 x 1200 mm, four hours' fire rating.
  • CSS80 – For 80 mm cavity width, green, 100 x 100 x 1200 mm, four hours' fire rating.
  • CSS85 – For 85 mm cavity width, green, 105 x 100 x 1200 mm, four hours' fire rating.
  • CSS90 – For 90 mm cavity width, green, 110 x 100 x 1200 mm, four hours' fire rating.
  • CSS95 – For 95 mm cavity width, green, 115 x 100 x 1200 mm, four hours fire rating.
  • CSS100 – For 100 mm cavity width, green, 120 x 100 x 1200 mm, four hours' fire rating.
  • CSS105 – For 105 mm cavity width, green, 120 x 120 x 1200 mm, four hours' fire rating.
  • CSS110 – For 110 mm cavity width, green, 120 x 120 x 1200 mm, four hours' fire rating.
  • CSS115 – For 115 mm cavity width, light blue, 130 x 120 x 1200 mm, four hours' fire rating.
  • CSS120 – For 120 mm cavity width, light blue, 135 x 120 x 1200 mm, four hours' fire rating.
  • CSS125 – For 125 mm cavity width, light blue, 135 x 120 x 1200 mm, four hours' fire rating.
  • CSS130 – For 130 mm cavity width, light blue, 140 x 120 x 1200 mm, four hours' fire rating.
  • CSS135 – For 135 mm cavity width, light blue, 145 x 120 x 1200 mm, four hours' fire rating.
  • CSS140 – For 140 mm cavity width, light blue, 150 x 120 x 1200 mm, four hours' fire rating.
  • CSS145 – For 145 mm cavity width, light blue, 155 x 120 x 1200 mm, four hours' fire rating.
  • CSS150 – For 150 mm cavity width, light blue, 160 x 120 x 1200 mm, four hours' fire rating.
  • CSS155 – For 155 mm cavity width, light blue, 165 x 150 x 1200 mm, two hours' fire rating.
  • CSS160 – For 160 mm cavity width, light blue, 170 x 150 x 1200 mm, two hours' fire rating.
  • CSS165 – For 165 mm cavity width, light blue, 175 x 150 x 1200 mm, two hours' fire rating.
  • CSS170 – For 170 mm cavity width, light blue, 180 x 150 x 1200 mm, two hours' fire rating.
  • CSS175 – For 175 mm cavity width, light blue, 185 x 150 x 1200 mm, two hours' fire rating.
  • CSS180 – For 180 mm cavity width, light blue, 190 x 150 x 1200 mm, two hours' fire rating.
  • CSS185 – For 185 mm cavity width, red, 195 x 150 x 1200 mm, two hours' fire rating.
  • CSS190 – For 190 mm cavity width, red, 200 x 150 x 1200 mm, two hours' fire rating.
  • CSS195 – For 195 mm cavity width, red, 205 x 150 x 1200 mm, two hours' fire rating.
  • CSS200 – For 200 mm cavity width, red, 210 x 150 x 1200 mm, two hours' fire rating.
  • CSS225 – For 225 mm cavity width, black, 235 x 200 x 1200 mm, two hours' fire rating.
  • CSS250 – For 250 mm cavity width, black, 260 x 200 x 1200 mm, two hours' fire rating.
  • CSS275 – For 275 mm cavity width, black, 285 x 200 x 1200 mm, two hours' fire rating.
  • CSS300 – For 300 mm cavity width, black, 310 x 200 x 1200 mm, two hours' fire rating.
  • PWCSS50 – Party wall cavity fire barrier, for 50 mm cavity width, red, 55 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS75 – Party wall cavity fire barrier, for 75 mm cavity width, red, 80 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS100 – Party wall cavity fire barrier, for 100 mm cavity width, red, 105 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS125 – Party wall cavity fire barrier, for 125 mm cavity width, red, 130 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS150 – Party wall cavity fire barrier, for 150 mm cavity width, red, 155 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS175 – Party wall cavity fire barrier, for 175 mm cavity width, red, 180 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS200 – Party wall cavity fire barrier, for 200 mm cavity width, red, 205 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS225 – Party wall cavity fire barrier, for 225 mm cavity width, black, 230 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS250 – Party wall cavity fire barrier, for 250 mm cavity width, black, 255 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS275 – Party wall cavity fire barrier, for 275 mm cavity width, black, 280 x 250 x 1200 mm, four hours' fire rating.
  • PWCSS300 – Party wall cavity fire barrier, for 300 mm cavity width, black, 305 x 250 x 1200 mm, four hours' fire rating.

Cavity Stop Sock can be manufactured to suit any cavity width between 50–150 mm including intermediary sizes; contact manufacturer for information.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-70/427 Mineral wool fire stopping

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying

Manufacturer

Name:

ARC Building Solutions Limited

Tel:

+44 (0)113 2529428

Product reference

Cavity Stop Sock

Type

[ ______ ]

Manufacturer details

Units H1/H2 Gildersome Spur ,
Leeds, LS27 7JZ
Tel +44 (0)113 2529428
Fax
NBS Plus
NBS National BIM Library