Horizontal Fire Closers

Designed to provide at least one hour resistance to the spread of fire past the party wall of adjoining buildings. It also significantly reduces flanking sound transmission within masonry wall cavities.


  • Rockwool stone wool: 1200 x 260 mm, available in five thicknesses.
  • Damp proof course polythene: 1300 x 600 mm, 300 mm top lap, 40 mm bottom lap and 100 mm end lap. Conforms to BS 6515:1984.
  • The closer complies with the National House Building Council (NHBC) Requirements.

Fire performance to BS 476-20:

Two hours, assessed by Warrington Fire Reach Centre.

Surface spread of flame to BS 476-7:

Class 1 rated.


Can be used to prevent the passage of flanking sound within masonry cavities and complies with Building Regulations (E&W) Approved Document E 2003 and the requirements of Robust Details.


Ozone depletion potential of zero. No CFCs or HCFCs used in manufacture.

General information

Uniclass 2015

Pr_35_90_50_64 Plastics cavity closersPrimary


F30/18 Cavity closers

F30/180 Cavity closers

Specification data - Plastics cavity closers

Product Reference

Horizontal Fire Closers


50 mm

65 mm

75 mm

90 mm

100 mm

120 mm

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