Overscreed Sound Reduction System: HD1043 Hush System

The HD1043 system from Hush Acoustics is designed to help reduce sound transmission in separating floors which feature screeds such as concrete. This fully developed and tested solution provides an economical sound insulation system for any kind of refurbishment, conversion or new build project where a concrete/screed structure exists.

Performance is assured through a combination of high quality sound insulation materials, including Hush Overscreed Acoustic Membrane. This consists of a fine granulate of recycled rubber with a cork and PU elastomer bonding agent, providing a resilient layer suitable for use under most floor finishes. It also utilises the Hush MF system to create a service void whilst allowing for the installation of a high performance sound absorber layer - Hush Slab 100.

HD1043 complies with UK Building Regulations concerning acoustic insulation for separating floors - Approved Document E (England & Wales), Part G (Northern Ireland) and Section 5 (Scotland). 

It is created as follows:

• The Hush Overscreed Acoustic Membrane is bonded to the screed using the Hush Contact Adhesive. This acoustic membrane needs to cover the entire screeded floor and only suitable floor finishes are to be applied over it.
• The Hush MF Ceiling system is installed to the underside of the concrete structure and a clear 150mm void is created.
• The Hush Slab 100 Sound Absorber is to be installed within the MF Ceiling System, leaving a clear 50mm void.
• Two layers of 12.5mm Soundbloc are then fitted to the underside of the Hush MF Ceiling System. The boards are to be skim finished.

Acoustic Performance *

Impact (L’nT,w) - 48 dB

Airborne (DnT,w) - 64 dB

Airborne (DnT,w + Ctr) - 53 dB

* Results based on the full Hush System HD1043 to be installed as described with all flanking noise paths treated if needed.