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An insulated cavity closer designed to reduce flanking sound transmission and fire spread through masonry cavities at separating wall junctions and separating floors.

Acoustic Party Wall DPC consists of a strip of glass tissue faced, semi-rigid, Rockwool insulation bonded to a black polyethylene DPC.

General information
Specification data - Plastics cavity closers
Product Reference

Rockwool Acoustic Party Wall DPC


50 mm

75 mm

100 mm

Standard product features


  • Rockwool insulation: 1200 x 260 mm in four standard thicknesses.
  • DPC: 1300 mm long, with 100 mm end lap and 40 mm side lap.

Fire resistance:

60 minutes integrity and insulation in both vertical and horizontal applications.

Sound transmission:

Meets the requirements of Building Regulations, Approved document E (E&W) for minimizing flanking sound transmission.

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