Home > Companies > Hush Acoustics > HD1056 Block Cavity Block Wall

A high performing block cavity wall system.


  • Can be used in new build, conversion and refurbishment developments.
  • Provides a one-hour fire resistance.
  • Building Regulations Approved Document E (E&W), Technical Handbook Section 5 (Scotland) and Technical Handbook G (Northern Ireland) compliant.
  • A tried and tested method of creating a dense block cavity block masonry wall.
  • Excellent acoustic performance due to the mass of the blocks and the clear 100 mm cavity.


  • Block cavity wall (1900 kg/m³) - supplied by others.
  • 15 mm thick Gyproc Soundbloc plasterboard on both sides - supplied by others.
  • Hush Acoustic Sealant - to seal perimeters.

Related literature

The following content references this product:

Standard product features


- Hush Acoustic Sealant:

  • Description: Fire rated acoustic sealant/ adhesive.
  • Material: Intumescent acrylic.

Acoustic performance:

  • Airborne (Dntw): 58 dB.
  • Airborne (Dntw +Ctr): 48 dB.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
25-85-45/140 Gypsum board wall lining system

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Hush Acoustics


+44 (0)151 933 2026

Product reference

HD1056 Block Cavity Block Wall

Manufacturer details

44 Canal Street,
Merseyside, L20 8QU
Tel +44 (0)151 933 2026
Fax +44 (0)151 944 1146
NBS Plus